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   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2004,2005,2007 Free Software Foundation, Inc.
   4 #
   5 # This file is part of GNU Radio
   6 #
   7 # GNU Radio is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3, or (at your option)
  10 # any later version.
  11 #
  12 # GNU Radio is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with GNU Radio; see the file COPYING.  If not, write to
  19 # the Free Software Foundation, Inc., 51 Franklin Street,
  20 # Boston, MA 02110-1301, USA.
  21 #
  22
  23 from gnuradio import gr, gru
  24 from gnuradio import usrp
  25 from usrpm import usrp_dbid
  26 from gnuradio import eng_notation
  27 from gnuradio.eng_option import eng_option
  28 from gnuradio.wxgui import stdgui2, ra_fftsink, ra_stripchartsink, ra_waterfallsink, form, slider
  29 from optparse import OptionParser
  30 import wx
  31 import sys
  32 import Numeric
  33 import time
  34 import numpy.fft
  35 import ephem
  36
  37 class app_flow_graph(stdgui2.std_top_block):
  38         def __init__(self, frame, panel, vbox, argv):
  39                 stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv)
  40
  41                 self.frame = frame
  42                 self.panel = panel
  43
  44                 parser = OptionParser(option_class=eng_option)
  45                 parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
  46                         help="select USRP Rx side A or B (default=A)")
  47                 parser.add_option("-d", "--decim", type="int", default=16,
  48                         help="set fgpa decimation rate to DECIM [default=%default]")
  49                 parser.add_option("-f", "--freq", type="eng_float", default=None,
  50                         help="set frequency to FREQ", metavar="FREQ")
  51                 parser.add_option("-a", "--avg", type="eng_float", default=1.0,
  52                         help="set spectral averaging alpha")
  53                 parser.add_option("-i", "--integ", type="eng_float", default=1.0,
  54                         help="set integration time")
  55                 parser.add_option("-g", "--gain", type="eng_float", default=None,
  56                         help="set gain in dB (default is midpoint)")
  57                 parser.add_option("-l", "--reflevel", type="eng_float", default=30.0,
  58                         help="Set Total power reference level")
  59                 parser.add_option("-y", "--division", type="eng_float", default=0.5,
  60                         help="Set Total power Y division size")
  61                 parser.add_option("-e", "--longitude", type="eng_float", default=-76.02,help="Set Observer Longitude")
  62                 parser.add_option("-c", "--latitude", type="eng_float", default=44.85,help="Set Observer Latitude")
  63                 parser.add_option("-o", "--observing", type="eng_float", default=0.0,
  64                         help="Set observing frequency")
  65                 parser.add_option("-x", "--ylabel", default="dB", help="Y axis label")
  66                 parser.add_option("-z", "--divbase", type="eng_float", default=0.025, help="Y Division increment base")
  67                 parser.add_option("-v", "--stripsize", type="eng_float", default=2400, help="Size of stripchart, in 2Hz samples")
  68                 parser.add_option("-F", "--fft_size", type="eng_float", default=1024, help="Size of FFT")
  69                 parser.add_option("-N", "--decln", type="eng_float", default=999.99, help="Observing declination")
  70                 parser.add_option("-X", "--prefix", default="./")
  71                 parser.add_option("-M", "--fft_rate", type="eng_float", default=8.0, help="FFT Rate")
  72                 parser.add_option("-A", "--calib_coeff", type="eng_float", default=1.0, help="Calibration coefficient")
  73                 parser.add_option("-B", "--calib_offset", type="eng_float", default=0.0, help="Calibration coefficient")
  74                 parser.add_option("-W", "--waterfall", action="store_true", default=False, help="Use Waterfall FFT display")
  75                 parser.add_option("-S", "--setimode", action="store_true", default=False, help="Enable SETI processing of spectral data")
  76                 parser.add_option("-K", "--setik", type="eng_float", default=1.5, help="K value for SETI analysis")
  77                 parser.add_option("-T", "--setibandwidth", type="eng_float", default=12500, help="Instantaneous SETI observing bandwidth--must be divisor of 250Khz")
  78                 parser.add_option("-Q", "--seti_range", type="eng_float", default=1.0e6, help="Total scan width, in Hz for SETI scans")
  79                 parser.add_option("-Z", "--dual_mode", action="store_true",
  80                         default=False, help="Dual-polarization mode")
  81                 parser.add_option("-I", "--interferometer", action="store_true", default=False, help="Interferometer mode")
  82                 parser.add_option("-D", "--switch_mode", action="store_true", default=False, help="Dicke Switching mode")
  83                 parser.add_option("-P", "--reference_divisor", type="eng_float", default=1.0, help="Reference Divisor")
  84                 parser.add_option("-U", "--ref_fifo", default="@@@@")
  85                 parser.add_option("-h", "--notch_taps", type="int", default=64, help="Number of notch taps")
  86                 parser.add_option("-n", "--notches", action="store_true",
  87                     default=False, help="Notch frequencies after all other args")
  88                 (options, args) = parser.parse_args()
  89
  90                 self.setimode = options.setimode
  91                 self.dual_mode = options.dual_mode
  92                 self.interferometer = options.interferometer
  93                 self.normal_mode = False
  94                 self.switch_mode = options.switch_mode
  95                 self.switch_state = 0
  96                 self.reference_divisor = options.reference_divisor
  97                 self.ref_fifo = options.ref_fifo
  98
  99                 self.NOTCH_TAPS = options.notch_taps
 100                 self.notches = Numeric.zeros(self.NOTCH_TAPS,Numeric.Float64)
 101                 # Get notch locations
 102                 j = 0
 103                 for i in args:
 104                         self.notches[j] = float(i)
 105                         j = j + 1
 106
 107                 self.use_notches = options.notches
 108
 109                 if (self.ref_fifo != "@@@@"):
 110                         self.ref_fifo_file = open (self.ref_fifo, "w")
 111
 112                 modecount = 0
 113                 for modes in (self.dual_mode, self.interferometer):
 114                         if (modes == True):
 115                                 modecount = modecount + 1
 116
 117                 if (modecount > 1):
 118                         print "must select only 1 of --dual_mode, or --interferometer"
 119                         sys.exit(1)
 120
 121                 self.chartneeded = True
 122
 123                 if (self.setimode == True):
 124                         self.chartneeded = False
 125
 126                 if (self.setimode == True and self.interferometer == True):
 127                         print "can't pick both --setimode and --interferometer"
 128                         sys.exit(1)
 129
 130                 if (self.setimode == True and self.switch_mode == True):
 131                         print "can't pick both --setimode and --switch_mode"
 132                         sys.exit(1)
 133
 134                 if (self.interferometer == True and self.switch_mode == True):
 135                         print "can't pick both --interferometer and --switch_mode"
 136                         sys.exit(1)
 137
 138                 if (modecount == 0):
 139                         self.normal_mode = True
 140
 141                 self.show_debug_info = True
 142
 143                 # Pick up waterfall option
 144                 self.waterfall = options.waterfall
 145
 146                 # SETI mode stuff
 147                 self.setimode = options.setimode
 148                 self.seticounter = 0
 149                 self.setik = options.setik
 150                 self.seti_fft_bandwidth = int(options.setibandwidth)
 151
 152                 # Calculate binwidth
 153                 binwidth = self.seti_fft_bandwidth / options.fft_size
 154
 155                 # Use binwidth, and knowledge of likely chirp rates to set reasonable
 156                 #  values for SETI analysis code.       We assume that SETI signals will
 157                 #  chirp at somewhere between 0.10Hz/sec and 0.25Hz/sec.
 158                 #
 159                 # upper_limit is the "worst case"--that is, the case for which we have
 160                 #  to wait the longest to actually see any drift, due to the quantizing
 161                 #  on FFT bins.
 162                 upper_limit = binwidth / 0.10
 163                 self.setitimer = int(upper_limit * 2.00)
 164                 self.scanning = True
 165
 166                 # Calculate the CHIRP values based on Hz/sec
 167                 self.CHIRP_LOWER = 0.10 * self.setitimer
 168                 self.CHIRP_UPPER = 0.25 * self.setitimer
 169
 170                 # Reset hit counters to 0
 171                 self.hitcounter = 0
 172                 self.s1hitcounter = 0
 173                 self.s2hitcounter = 0
 174                 self.avgdelta = 0
 175                 # We scan through 2Mhz of bandwidth around the chosen center freq
 176                 self.seti_freq_range = options.seti_range
 177                 # Calculate lower edge
 178                 self.setifreq_lower = options.freq - (self.seti_freq_range/2)
 179                 self.setifreq_current = options.freq
 180                 # Calculate upper edge
 181                 self.setifreq_upper = options.freq + (self.seti_freq_range/2)
 182
 183                 # Maximum "hits" in a line
 184                 self.nhits = 20
 185
 186                 # Number of lines for analysis
 187                 self.nhitlines = 4
 188
 189                 # We change center frequencies based on nhitlines and setitimer
 190                 self.setifreq_timer = self.setitimer * (self.nhitlines * 5)
 191
 192                 # Create actual timer
 193                 self.seti_then = time.time()
 194
 195                 # The hits recording array
 196                 self.hits_array = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
 197                 self.hit_intensities = Numeric.zeros((self.nhits,self.nhitlines), Numeric.Float64)
 198                 # Calibration coefficient and offset
 199                 self.calib_coeff = options.calib_coeff
 200                 self.calib_offset = options.calib_offset
 201                 if self.calib_offset < -750:
 202                         self.calib_offset = -750
 203                 if self.calib_offset > 750:
 204                         self.calib_offset = 750
 205
 206                 if self.calib_coeff < 1:
 207                         self.calib_coeff = 1
 208                 if self.calib_coeff > 100:
 209                         self.calib_coeff = 100
 210
 211                 self.integ = options.integ
 212                 self.avg_alpha = options.avg
 213                 self.gain = options.gain
 214                 self.decln = options.decln
 215
 216                 # Set initial values for datalogging timed-output
 217                 self.continuum_then = time.time()
 218                 self.spectral_then = time.time()
 219
 220
 221                 # build the graph
 222
 223                 self.subdev = [(0, 0), (0,0)]
 224
 225                 #
 226                 # If SETI mode, we always run at maximum USRP decimation
 227                 #
 228                 if (self.setimode):
 229                         options.decim = 256
 230
 231                 if (self.dual_mode == False and self.interferometer == False):
 232                         self.u = usrp.source_c(decim_rate=options.decim,fusb_block_size=8192)
 233                         self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
 234                         # determine the daughterboard subdevice we're using
 235                         self.subdev[0] = usrp.selected_subdev(self.u, options.rx_subdev_spec)
 236                         self.subdev[1] = self.subdev[0]
 237                         self.cardtype = self.subdev[0].dbid()
 238                 else:
 239                         self.u=usrp.source_c(decim_rate=options.decim, nchan=2,fusb_block_size=8192)
 240                         self.subdev[0] = usrp.selected_subdev(self.u, (0, 0))
 241                         self.subdev[1] = usrp.selected_subdev(self.u, (1, 0))
 242                         self.cardtype = self.subdev[0].dbid()
 243                         self.u.set_mux(0x32103210)
 244                         c1 = self.subdev[0].name()
 245                         c2 = self.subdev[1].name()
 246                         if (c1 != c2):
 247                                 print "Must have identical cardtypes for --dual_mode or --interferometer"
 248                                 sys.exit(1)
 249                 #
 250                 # Set 8-bit mode
 251                 #
 252                 width = 8
 253                 shift = 8
 254                 format = self.u.make_format(width, shift)
 255                 r = self.u.set_format(format)
 256
 257                 # Set initial declination
 258                 self.decln = options.decln
 259
 260                 input_rate = self.u.adc_freq() / self.u.decim_rate()
 261                 self.bw = input_rate
 262                 #
 263                 # Set prefix for data files
 264                 #
 265                 self.prefix = options.prefix
 266
 267                 #
 268                 # The lower this number, the fewer sample frames are dropped
 269                 #  in computing the FFT.  A sampled approach is taken to
 270                 #  computing the FFT of the incoming data, which reduces
 271                 #  sensitivity.  Increasing sensitivity inreases CPU loading.
 272                 #
 273                 self.fft_rate = options.fft_rate
 274
 275                 self.fft_size = int(options.fft_size)
 276
 277                 # This buffer is used to remember the most-recent FFT display
 278                 #       values.  Used later by self.write_spectral_data() to write
 279                 #       spectral data to datalogging files, and by the SETI analysis
 280                 #       function.
 281                 #
 282                 self.fft_outbuf = Numeric.zeros(self.fft_size, Numeric.Float64)
 283
 284                 #
 285                 # If SETI mode, only look at seti_fft_bandwidth
 286                 #       at a time.
 287                 #
 288                 if (self.setimode):
 289                         self.fft_input_rate = self.seti_fft_bandwidth
 290
 291                         #
 292                         # Build a decimating bandpass filter
 293                         #
 294                         self.fft_input_taps = gr.firdes.complex_band_pass (1.0,
 295                            input_rate,
 296                            -(int(self.fft_input_rate/2)), int(self.fft_input_rate/2), 200,
 297                            gr.firdes.WIN_HAMMING, 0)
 298
 299                         #
 300                         # Compute required decimation factor
 301                         #
 302                         decimation = int(input_rate/self.fft_input_rate)
 303                         self.fft_bandpass = gr.fir_filter_ccc (decimation,
 304                                 self.fft_input_taps)
 305                 else:
 306                         self.fft_input_rate = input_rate
 307
 308                 # Set up FFT display
 309                 if self.waterfall == False:
 310                    self.scope = ra_fftsink.ra_fft_sink_c (panel,
 311                            fft_size=int(self.fft_size), sample_rate=self.fft_input_rate,
 312                            fft_rate=int(self.fft_rate), title="Spectral",
 313                            ofunc=self.fft_outfunc, xydfunc=self.xydfunc)
 314                 else:
 315                         self.scope = ra_waterfallsink.waterfall_sink_c (panel,
 316                                 fft_size=int(self.fft_size), sample_rate=self.fft_input_rate,
 317                                 fft_rate=int(self.fft_rate), title="Spectral", ofunc=self.fft_outfunc, size=(1100, 600), xydfunc=self.xydfunc, ref_level=0, span=10)
 318
 319                 # Set up ephemeris data
 320                 self.locality = ephem.Observer()
 321                 self.locality.long = str(options.longitude)
 322                 self.locality.lat = str(options.latitude)
 323
 324                 # We make notes about Sunset/Sunrise in Continuum log files
 325                 self.sun = ephem.Sun()
 326                 self.sunstate = "??"
 327
 328                 # Set up stripchart display
 329                 tit = "Continuum"
 330                 if (self.dual_mode != False):
 331                         tit = "H+V Continuum"
 332                 if (self.interferometer != False):
 333                         tit = "East x West Correlation"
 334                 self.stripsize = int(options.stripsize)
 335                 if self.chartneeded == True:
 336                         self.chart = ra_stripchartsink.stripchart_sink_f (panel,
 337                                 stripsize=self.stripsize,
 338                                 title=tit,
 339                                 xlabel="LMST Offset (Seconds)",
 340                                 scaling=1.0, ylabel=options.ylabel,
 341                                 divbase=options.divbase)
 342
 343                 # Set center frequency
 344                 self.centerfreq = options.freq
 345
 346                 # Set observing frequency (might be different from actual programmed
 347                 #        RF frequency)
 348                 if options.observing == 0.0:
 349                         self.observing = options.freq
 350                 else:
 351                         self.observing = options.observing
 352
 353                 # Remember our input bandwidth
 354                 self.bw = input_rate
 355
 356                 #
 357                 #
 358                 # The strip chart is fed at a constant 1Hz rate
 359                 #
 360
 361                 #
 362                 # Call constructors for receive chains
 363                 #
 364
 365                 if (self.dual_mode == True):
 366                         self.setup_dual (self.setimode)
 367
 368                 if (self.interferometer == True):
 369                         self.setup_interferometer(self.setimode)
 370
 371                 if (self.normal_mode == True):
 372                         self.setup_normal(self.setimode)
 373
 374                 if (self.setimode == True):
 375                         self.setup_seti()
 376
 377                 self._build_gui(vbox)
 378
 379                 # Make GUI agree with command-line
 380                 self.integ = options.integ
 381                 if self.setimode == False:
 382                         self.myform['integration'].set_value(int(options.integ))
 383                         self.myform['offset'].set_value(self.calib_offset)
 384                         self.myform['dcgain'].set_value(self.calib_coeff)
 385                 self.myform['average'].set_value(int(options.avg))
 386
 387
 388                 if self.setimode == False:
 389                         # Make integrator agree with command line
 390                         self.set_integration(int(options.integ))
 391
 392                 self.avg_alpha = options.avg
 393
 394                 # Make spectral averager agree with command line
 395                 if options.avg != 1.0:
 396                         self.scope.set_avg_alpha(float(1.0/options.avg))
 397                         self.scope.set_average(True)
 398
 399                 if self.setimode == False:
 400                         # Set division size
 401                         self.chart.set_y_per_div(options.division)
 402                         # Set reference(MAX) level
 403                         self.chart.set_ref_level(options.reflevel)
 404
 405                 # set initial values
 406
 407                 if options.gain is None:
 408                         # if no gain was specified, use the mid-point in dB
 409                         g = self.subdev[0].gain_range()
 410                         options.gain = float(g[0]+g[1])/2
 411
 412                 if options.freq is None:
 413                         # if no freq was specified, use the mid-point
 414                         r = self.subdev[0].freq_range()
 415                         options.freq = float(r[0]+r[1])/2
 416
 417                 # Set the initial gain control
 418                 self.set_gain(options.gain)
 419
 420                 if not(self.set_freq(options.freq)):
 421                         self._set_status_msg("Failed to set initial frequency")
 422
 423                 # Set declination
 424                 self.set_decln (self.decln)
 425
 426
 427                 # RF hardware information
 428                 self.myform['decim'].set_value(self.u.decim_rate())
 429                 self.myform['USB BW'].set_value(self.u.adc_freq() / self.u.decim_rate())
 430                 if (self.dual_mode == True):
 431                         self.myform['dbname'].set_value(self.subdev[0].name()+'/'+self.subdev[1].name())
 432                 else:
 433                         self.myform['dbname'].set_value(self.subdev[0].name())
 434
 435                 # Set analog baseband filtering, if DBS_RX
 436                 if self.cardtype in (usrp_dbid.DBS_RX, usrp_dbid.DBS_RX_REV_2_1):
 437                         lbw = (self.u.adc_freq() / self.u.decim_rate()) / 2
 438                         if lbw < 1.0e6:
 439                                 lbw = 1.0e6
 440                         self.subdev[0].set_bw(lbw)
 441                         self.subdev[1].set_bw(lbw)
 442
 443                 # Start the timer for the LMST display and datalogging
 444                 self.lmst_timer.Start(1000)
 445                 if (self.switch_mode == True):
 446                         self.other_timer.Start(330)
 447
 448
 449         def _set_status_msg(self, msg):
 450                 self.frame.GetStatusBar().SetStatusText(msg, 0)
 451
 452         def _build_gui(self, vbox):
 453
 454                 def _form_set_freq(kv):
 455                         # Adjust current SETI frequency, and limits
 456                         self.setifreq_lower = kv['freq'] - (self.seti_freq_range/2)
 457                         self.setifreq_current = kv['freq']
 458                         self.setifreq_upper = kv['freq'] + (self.seti_freq_range/2)
 459
 460                         # Reset SETI analysis timer
 461                         self.seti_then = time.time()
 462                         # Zero-out hits array when changing frequency
 463                         self.hits_array[:,:] = 0.0
 464                         self.hit_intensities[:,:] = -60.0
 465
 466                         return self.set_freq(kv['freq'])
 467
 468                 def _form_set_decln(kv):
 469                         return self.set_decln(kv['decln'])
 470
 471                 # Position the FFT display
 472                 vbox.Add(self.scope.win, 15, wx.EXPAND)
 473
 474                 if self.setimode == False:
 475                         # Position the Total-power stripchart
 476                         vbox.Add(self.chart.win, 15, wx.EXPAND)
 477
 478                 # add control area at the bottom
 479                 self.myform = myform = form.form()
 480                 hbox = wx.BoxSizer(wx.HORIZONTAL)
 481                 hbox.Add((7,0), 0, wx.EXPAND)
 482                 vbox1 = wx.BoxSizer(wx.VERTICAL)
 483                 myform['freq'] = form.float_field(
 484                         parent=self.panel, sizer=vbox1, label="Center freq", weight=1,
 485                         callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
 486
 487                 vbox1.Add((4,0), 0, 0)
 488
 489                 myform['lmst_high'] = form.static_text_field(
 490                         parent=self.panel, sizer=vbox1, label="Current LMST", weight=1)
 491                 vbox1.Add((4,0), 0, 0)
 492
 493                 if self.setimode == False:
 494                         myform['spec_data'] = form.static_text_field(
 495                                 parent=self.panel, sizer=vbox1, label="Spectral Cursor", weight=1)
 496                         vbox1.Add((4,0), 0, 0)
 497
 498                 vbox2 = wx.BoxSizer(wx.VERTICAL)
 499                 if self.setimode == False:
 500                         vbox3 = wx.BoxSizer(wx.VERTICAL)
 501                 g = self.subdev[0].gain_range()
 502                 myform['gain'] = form.slider_field(parent=self.panel, sizer=vbox2, label="RF Gain",
 503                                                                                    weight=1,
 504                                                                                    min=int(g[0]), max=int(g[1]),
 505                                                                                    callback=self.set_gain)
 506
 507                 vbox2.Add((4,0), 0, 0)
 508                 if self.setimode == True:
 509                         max_savg = 100
 510                 else:
 511                         max_savg = 3000
 512                 myform['average'] = form.slider_field(parent=self.panel, sizer=vbox2,
 513                                         label="Spectral Averaging (FFT frames)", weight=1, min=1, max=max_savg, callback=self.set_averaging)
 514
 515                 # Set up scan control button when in SETI mode
 516                 if (self.setimode == True):
 517                         # SETI scanning control
 518                         buttonbox = wx.BoxSizer(wx.HORIZONTAL)
 519                         self.scan_control = form.button_with_callback(self.panel,
 520                                   label="Scan: On ",
 521                                   callback=self.toggle_scanning)
 522
 523                         buttonbox.Add(self.scan_control, 0, wx.CENTER)
 524                         vbox2.Add(buttonbox, 0, wx.CENTER)
 525
 526                 vbox2.Add((4,0), 0, 0)
 527
 528                 if self.setimode == False:
 529                         myform['integration'] = form.slider_field(parent=self.panel, sizer=vbox2,
 530                                    label="Continuum Integration Time (sec)", weight=1, min=1, max=180, callback=self.set_integration)
 531
 532                         vbox2.Add((4,0), 0, 0)
 533
 534                 myform['decln'] = form.float_field(
 535                         parent=self.panel, sizer=vbox2, label="Current Declination", weight=1,
 536                         callback=myform.check_input_and_call(_form_set_decln))
 537                 vbox2.Add((4,0), 0, 0)
 538
 539                 if self.setimode == False:
 540                         myform['offset'] = form.slider_field(parent=self.panel, sizer=vbox3,
 541                                 label="Post-Detector Offset", weight=1, min=-750, max=750,
 542                                 callback=self.set_pd_offset)
 543                         vbox3.Add((2,0), 0, 0)
 544                         myform['dcgain'] = form.slider_field(parent=self.panel, sizer=vbox3,
 545                                 label="Post-Detector Gain", weight=1, min=1, max=100,
 546                                 callback=self.set_pd_gain)
 547                         vbox3.Add((2,0), 0, 0)
 548                 hbox.Add(vbox1, 0, 0)
 549                 hbox.Add(vbox2, wx.ALIGN_RIGHT, 0)
 550
 551                 if self.setimode == False:
 552                         hbox.Add(vbox3, wx.ALIGN_RIGHT, 0)
 553
 554                 vbox.Add(hbox, 0, wx.EXPAND)
 555
 556                 self._build_subpanel(vbox)
 557
 558                 self.lmst_timer = wx.PyTimer(self.lmst_timeout)
 559                 self.other_timer = wx.PyTimer(self.other_timeout)
 560
 561
 562         def _build_subpanel(self, vbox_arg):
 563                 # build a secondary information panel (sometimes hidden)
 564
 565                 # FIXME figure out how to have this be a subpanel that is always
 566                 # created, but has its visibility controlled by foo.Show(True/False)
 567
 568                 if not(self.show_debug_info):
 569                         return
 570
 571                 panel = self.panel
 572                 vbox = vbox_arg
 573                 myform = self.myform
 574
 575                 #panel = wx.Panel(self.panel, -1)
 576                 #vbox = wx.BoxSizer(wx.VERTICAL)
 577
 578                 hbox = wx.BoxSizer(wx.HORIZONTAL)
 579                 hbox.Add((5,0), 0)
 580                 myform['decim'] = form.static_float_field(
 581                         parent=panel, sizer=hbox, label="Decim")
 582
 583                 hbox.Add((5,0), 1)
 584                 myform['USB BW'] = form.static_float_field(
 585                         parent=panel, sizer=hbox, label="USB BW")
 586
 587                 hbox.Add((5,0), 1)
 588                 myform['dbname'] = form.static_text_field(
 589                         parent=panel, sizer=hbox)
 590
 591                 hbox.Add((5,0), 1)
 592                 myform['baseband'] = form.static_float_field(
 593                         parent=panel, sizer=hbox, label="Analog BB")
 594
 595                 hbox.Add((5,0), 1)
 596                 myform['ddc'] = form.static_float_field(
 597                         parent=panel, sizer=hbox, label="DDC")
 598
 599                 hbox.Add((5,0), 0)
 600                 vbox.Add(hbox, 0, wx.EXPAND)
 601
 602
 603
 604         def set_freq(self, target_freq):
 605                 """
 606                 Set the center frequency we're interested in.
 607
 608                 @param target_freq: frequency in Hz
 609                 @rypte: bool
 610
 611                 Tuning is a two step process.  First we ask the front-end to
 612                 tune as close to the desired frequency as it can.  Then we use
 613                 the result of that operation and our target_frequency to
 614                 determine the value for the digital down converter.
 615                 """
 616                 #
 617                 # Everything except BASIC_RX should support usrp.tune()
 618                 #
 619                 if not (self.cardtype == usrp_dbid.BASIC_RX):
 620                         r = usrp.tune(self.u, self.subdev[0].which(), self.subdev[0], target_freq)
 621                         r = usrp.tune(self.u, self.subdev[1].which(), self.subdev[1], target_freq)
 622                 else:
 623                         r = self.u.set_rx_freq(0, target_freq)
 624                         f = self.u.rx_freq(0)
 625                         if abs(f-target_freq) > 2.0e3:
 626                                 r = 0
 627                 if r:
 628                         self.myform['freq'].set_value(target_freq)         # update displayed value
 629                         #
 630                         # Make sure calibrator knows our target freq
 631                         #
 632
 633                         # Remember centerfreq---used for doppler calcs
 634                         delta = self.centerfreq - target_freq
 635                         self.centerfreq = target_freq
 636                         self.observing -= delta
 637                         self.scope.set_baseband_freq (self.observing)
 638
 639                         self.myform['baseband'].set_value(r.baseband_freq)
 640                         self.myform['ddc'].set_value(r.dxc_freq)
 641
 642                         if (self.use_notches):
 643                                 self.compute_notch_taps(self.notches)
 644                                 if self.dual_mode == False and self.interferometer == False:
 645                                         self.notch_filt.set_taps(self.notch_taps)
 646                                 else:
 647                                         self.notch_filt1.set_taps(self.notch_taps)
 648                                         self.notch_filt2.set_taps(self.notch_taps)
 649
 650                         return True
 651
 652                 return False
 653
 654         def set_decln(self, dec):
 655                 self.decln = dec
 656                 self.myform['decln'].set_value(dec)             # update displayed value
 657
 658         def set_gain(self, gain):
 659                 self.myform['gain'].set_value(gain)             # update displayed value
 660                 self.subdev[0].set_gain(gain)
 661                 self.subdev[1].set_gain(gain)
 662                 self.gain = gain
 663
 664         def set_averaging(self, avval):
 665                 self.myform['average'].set_value(avval)
 666                 self.scope.set_avg_alpha(1.0/(avval))
 667                 self.scope.set_average(True)
 668                 self.avg_alpha = avval
 669
 670         def set_integration(self, integval):
 671                 if self.setimode == False:
 672                         self.integrator.set_taps(1.0/((integval)*(self.bw/2)))
 673                 self.myform['integration'].set_value(integval)
 674                 self.integ = integval
 675
 676         #
 677         # Timeout function
 678         # Used to update LMST display, as well as current
 679         #  continuum value
 680         #
 681         # We also write external data-logging files here
 682         #
 683         def lmst_timeout(self):
 684                 self.locality.date = ephem.now()
 685                 if self.setimode == False:
 686                  x = self.probe.level()
 687                 sidtime = self.locality.sidereal_time()
 688                 # LMST
 689                 s = str(ephem.hours(sidtime)) + " " + self.sunstate
 690                 # Continuum detector value
 691                 if self.setimode == False:
 692                  sx = "%7.4f" % x
 693                  s = s + "\nDet: " + str(sx)
 694                 else:
 695                  sx = "%2d" % self.hitcounter
 696                  s1 = "%2d" % self.s1hitcounter
 697                  s2 = "%2d" % self.s2hitcounter
 698                  sa = "%4.2f" % self.avgdelta
 699                  sy = "%3.1f-%3.1f" % (self.CHIRP_LOWER, self.CHIRP_UPPER)
 700                  s = s + "\nHits: " + str(sx) + "\nS1:" + str(s1) + " S2:" + str(s2)
 701                  s = s + "\nAv D: " + str(sa) + "\nCh lim: " + str(sy)
 702
 703                 self.myform['lmst_high'].set_value(s)
 704
 705                 #
 706                 # Write data out to recording files
 707                 #
 708                 if self.setimode == False:
 709                  self.write_continuum_data(x,sidtime)
 710                  self.write_spectral_data(self.fft_outbuf,sidtime)
 711
 712                 else:
 713                  self.seti_analysis(self.fft_outbuf,sidtime)
 714                  now = time.time()
 715                  if ((self.scanning == True) and ((now - self.seti_then) > self.setifreq_timer)):
 716                          self.seti_then = now
 717                          self.setifreq_current = self.setifreq_current + self.fft_input_rate
 718                          if (self.setifreq_current > self.setifreq_upper):
 719                                  self.setifreq_current = self.setifreq_lower
 720                          self.set_freq(self.setifreq_current)
 721                          # Make sure we zero-out the hits array when changing
 722                          #       frequency.
 723                          self.hits_array[:,:] = 0.0
 724                          self.hit_intensities[:,:] = 0.0
 725
 726         def other_timeout(self):
 727                 if (self.switch_state == 0):
 728                         self.switch_state = 1
 729
 730                 elif (self.switch_state == 1):
 731                         self.switch_state = 0
 732
 733                 if (self.switch_state == 0):
 734                         self.mute.set_n(1)
 735                         self.cmute.set_n(int(1.0e9))
 736
 737                 elif (self.switch_state == 1):
 738                         self.mute.set_n(int(1.0e9))
 739                         self.cmute.set_n(1)
 740
 741                 if (self.ref_fifo != "@@@@"):
 742                         self.ref_fifo_file.write(str(self.switch_state)+"\n")
 743                         self.ref_fifo_file.flush()
 744
 745                 self.avg_reference_value = self.cprobe.level()
 746
 747                 #
 748                 # Set reference value
 749                 #
 750                 self.reference_level.set_k(-1.0 * (self.avg_reference_value/self.reference_divisor))
 751
 752         def fft_outfunc(self,data,l):
 753                 self.fft_outbuf=data
 754
 755         def write_continuum_data(self,data,sidtime):
 756
 757                 # Create localtime structure for producing filename
 758                 foo = time.localtime()
 759                 pfx = self.prefix
 760                 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
 761                    foo.tm_mon, foo.tm_mday, foo.tm_hour)
 762
 763                 # Open the data file, appending
 764                 continuum_file = open (filenamestr+".tpdat","a")
 765
 766                 flt = "%6.3f" % data
 767                 inter = self.decln
 768                 integ = self.integ
 769                 fc = self.observing
 770                 fc = fc / 1000000
 771                 bw = self.bw
 772                 bw = bw / 1000000
 773                 ga = self.gain
 774
 775                 now = time.time()
 776
 777                 #
 778                 # If time to write full header info (saves storage this way)
 779                 #
 780                 if (now - self.continuum_then > 20):
 781                         self.sun.compute(self.locality)
 782                         enow = ephem.now()
 783                         sunset = self.locality.next_setting(self.sun)
 784                         sunrise = self.locality.next_rising(self.sun)
 785                         sun_insky = "Down"
 786                         self.sunstate = "Dn"
 787                         if ((sunrise < enow) and (enow < sunset)):
 788                            sun_insky = "Up"
 789                            self.sunstate = "Up"
 790                         self.continuum_then = now
 791
 792                         continuum_file.write(str(ephem.hours(sidtime))+" "+flt+" Dn="+str(inter)+",")
 793                         continuum_file.write("Ti="+str(integ)+",Fc="+str(fc)+",Bw="+str(bw))
 794                         continuum_file.write(",Ga="+str(ga)+",Sun="+str(sun_insky)+"\n")
 795                 else:
 796                         continuum_file.write(str(ephem.hours(sidtime))+" "+flt+"\n")
 797
 798                 continuum_file.close()
 799                 return(data)
 800
 801         def write_spectral_data(self,data,sidtime):
 802
 803                 now = time.time()
 804                 delta = 10
 805
 806                 # If time to write out spectral data
 807                 # We don't write this out every time, in order to
 808                 #       save disk space.  Since the spectral data are
 809                 #       typically heavily averaged, writing this data
 810                 #       "once in a while" is OK.
 811                 #
 812                 if (now - self.spectral_then >= delta):
 813                         self.spectral_then = now
 814
 815                         # Get localtime structure to make filename from
 816                         foo = time.localtime()
 817
 818                         pfx = self.prefix
 819                         filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
 820                            foo.tm_mon, foo.tm_mday, foo.tm_hour)
 821
 822                         # Open the file
 823                         spectral_file = open (filenamestr+".sdat","a")
 824
 825                         # Setup data fields to be written
 826                         r = data
 827                         inter = self.decln
 828                         fc = self.observing
 829                         fc = fc / 1000000
 830                         bw = self.bw
 831                         bw = bw / 1000000
 832                         av = self.avg_alpha
 833
 834                         # Write those fields
 835                         spectral_file.write("data:"+str(ephem.hours(sidtime))+" Dn="+str(inter)+",Fc="+str(fc)+",Bw="+str(bw)+",Av="+str(av))
 836                         spectral_file.write (" [ ")
 837                         for r in data:
 838                                 spectral_file.write(" "+str(r))
 839
 840                         spectral_file.write(" ]\n")
 841                         spectral_file.close()
 842                         return(data)
 843
 844                 return(data)
 845
 846         def seti_analysis(self,fftbuf,sidtime):
 847                 l = len(fftbuf)
 848                 x = 0
 849                 hits = []
 850                 hit_intensities = []
 851                 if self.seticounter < self.setitimer:
 852                         self.seticounter = self.seticounter + 1
 853                         return
 854                 else:
 855                         self.seticounter = 0
 856
 857                 # Run through FFT output buffer, computing standard deviation (Sigma)
 858                 avg = 0
 859                 # First compute average
 860                 for i in range(0,l):
 861                         avg = avg + fftbuf[i]
 862                 avg = avg / l
 863
 864                 sigma = 0.0
 865                 # Then compute standard deviation (Sigma)
 866                 for i in range(0,l):
 867                         d = fftbuf[i] - avg
 868                         sigma = sigma + (d*d)
 869
 870                 sigma = Numeric.sqrt(sigma/l)
 871
 872                 #
 873                 # Snarfle through the FFT output buffer again, looking for
 874                 #        outlying data points
 875
 876                 start_f = self.observing - (self.fft_input_rate/2)
 877                 current_f = start_f
 878                 l = len(fftbuf)
 879                 f_incr = self.fft_input_rate / l
 880                 hit = -1
 881
 882                 # -nyquist to DC
 883                 for i in range(l/2,l):
 884                         #
 885                         # If current FFT buffer has an item that exceeds the specified
 886                         #  sigma
 887                         #
 888                         if ((fftbuf[i] - avg) > (self.setik * sigma)):
 889                                 hits.append(current_f)
 890                                 hit_intensities.append(fftbuf[i])
 891                         current_f = current_f + f_incr
 892
 893                 # DC to nyquist
 894                 for i in range(0,l/2):
 895                         #
 896                         # If current FFT buffer has an item that exceeds the specified
 897                         #  sigma
 898                         #
 899                         if ((fftbuf[i] - avg) > (self.setik * sigma)):
 900                                 hits.append(current_f)
 901                                 hit_intensities.append(fftbuf[i])
 902                         current_f = current_f + f_incr
 903
 904                 # No hits
 905                 if (len(hits) <= 0):
 906                         return
 907
 908
 909                 #
 910                 # OK, so we have some hits in the FFT buffer
 911                 #       They'll have a rather substantial gauntlet to run before
 912                 #       being declared a real "hit"
 913                 #
 914
 915                 # Update stats
 916                 self.s1hitcounter = self.s1hitcounter + len(hits)
 917
 918                 # Weed out buffers with an excessive number of
 919                 #       signals above Sigma
 920                 if (len(hits) > self.nhits):
 921                         return
 922
 923
 924                 # Weed out FFT buffers with apparent multiple narrowband signals
 925                 #       separated significantly in frequency.  This means that a
 926                 #       single signal spanning multiple bins is OK, but a buffer that
 927                 #       has multiple, apparently-separate, signals isn't OK.
 928                 #
 929                 last = hits[0]
 930                 ns2 = 1
 931                 for i in range(1,len(hits)):
 932                         if ((hits[i] - last) > (f_incr*3.0)):
 933                                 return
 934                         last = hits[i]
 935                         ns2 = ns2 + 1
 936
 937                 self.s2hitcounter = self.s2hitcounter + ns2
 938
 939                 #
 940                 # Run through all available hit buffers, computing difference between
 941                 #       frequencies found there, if they're all within the chirp limits
 942                 #       declare a good hit
 943                 #
 944                 good_hit = False
 945                 f_ds = Numeric.zeros(self.nhitlines, Numeric.Float64)
 946                 avg_delta = 0
 947                 k = 0
 948                 for i in range(0,min(len(hits),len(self.hits_array[:,0]))):
 949                         f_ds[0] = abs(self.hits_array[i,0] - hits[i])
 950                         for j in range(1,len(f_ds)):
 951                            f_ds[j] = abs(self.hits_array[i,j] - self.hits_array[i,0])
 952                            avg_delta = avg_delta + f_ds[j]
 953                            k = k + 1
 954
 955                         if (self.seti_isahit (f_ds)):
 956                                 good_hit = True
 957                                 self.hitcounter = self.hitcounter + 1
 958                                 break
 959
 960                 if (avg_delta/k < (self.seti_fft_bandwidth/2)):
 961                         self.avgdelta = avg_delta / k
 962
 963                 # Save 'n shuffle hits
 964                 #  Old hit buffers percolate through the hit buffers
 965                 #  (there are self.nhitlines of these buffers)
 966                 #  and then drop off the end
 967                 #  A consequence is that while the nhitlines buffers are filling,
 968                 #  you can get some absurd values for self.avgdelta, because some
 969                 #  of the buffers are full of zeros
 970                 for i in range(self.nhitlines,1):
 971                         self.hits_array[:,i] = self.hits_array[:,i-1]
 972                         self.hit_intensities[:,i] = self.hit_intensities[:,i-1]
 973
 974                 for i in range(0,len(hits)):
 975                         self.hits_array[i,0] = hits[i]
 976                         self.hit_intensities[i,0] = hit_intensities[i]
 977
 978                 # Finally, write the hits/intensities buffer
 979                 if (good_hit):
 980                         self.write_hits(sidtime)
 981
 982                 return
 983
 984         def seti_isahit(self,fdiffs):
 985                 truecount = 0
 986
 987                 for i in range(0,len(fdiffs)):
 988                         if (fdiffs[i] >= self.CHIRP_LOWER and fdiffs[i] <= self.CHIRP_UPPER):
 989                                 truecount = truecount + 1
 990
 991                 if truecount == len(fdiffs):
 992                         return (True)
 993                 else:
 994                         return (False)
 995
 996         def write_hits(self,sidtime):
 997                 # Create localtime structure for producing filename
 998                 foo = time.localtime()
 999                 pfx = self.prefix
1000                 filenamestr = "%s/%04d%02d%02d%02d" % (pfx, foo.tm_year,
1001                    foo.tm_mon, foo.tm_mday, foo.tm_hour)
1002
1003                 # Open the data file, appending
1004                 hits_file = open (filenamestr+".seti","a")
1005
1006                 # Write sidtime first
1007                 hits_file.write(str(ephem.hours(sidtime))+" "+str(self.decln)+" ")
1008
1009                 #
1010                 # Then write the hits/hit intensities buffers with enough
1011                 #       "syntax" to allow parsing by external (not yet written!)
1012                 #       "stuff".
1013                 #
1014                 for i in range(0,self.nhitlines):
1015                         hits_file.write(" ")
1016                         for j in range(0,self.nhits):
1017                                 hits_file.write(str(self.hits_array[j,i])+":")
1018                                 hits_file.write(str(self.hit_intensities[j,i])+",")
1019                 hits_file.write("\n")
1020                 hits_file.close()
1021                 return
1022
1023         def xydfunc(self,func,xyv):
1024                 if self.setimode == True:
1025                         return
1026                 magn = int(Numeric.log10(self.observing))
1027                 if (magn == 6 or magn == 7 or magn == 8):
1028                         magn = 6
1029                 dfreq = xyv[0] * pow(10.0,magn)
1030                 if func == 0:
1031                         ratio = self.observing / dfreq
1032                         vs = 1.0 - ratio
1033                         vs *= 299792.0
1034                         if magn >= 9:
1035                            xhz = "Ghz"
1036                         elif magn >= 6:
1037                            xhz = "Mhz"
1038                         elif magn <= 5:
1039                            xhz =  "Khz"
1040                         s = "%.6f%s\n%.3fdB" % (xyv[0], xhz, xyv[1])
1041                         s2 = "\n%.3fkm/s" % vs
1042                         self.myform['spec_data'].set_value(s+s2)
1043                 else:
1044                         tmpnotches = Numeric.zeros(self.NOTCH_TAPS,Numeric.Float64)
1045                         delfreq = -1
1046                         if self.use_notches == True:
1047                                 for i in range(0,len(self.notches)):
1048                                         if self.notches[i] != 0 and abs(self.notches[i] - dfreq) < ((self.bw/self.NOTCH_TAPS)/2.0):
1049                                                 delfreq = i
1050                                                 break
1051                                 j = 0
1052                                 for i in range(0,len(self.notches)):
1053                                         if (i != delfreq):
1054                                                 tmpnotches[j] = self.notches[i]
1055                                                 j = j + 1
1056                                 if (delfreq == -1):
1057                                         for i in range(0,len(tmpnotches)):
1058                                                 if (int(tmpnotches[i]) == 0):
1059                                                         tmpnotches[i] = dfreq
1060                                                         break
1061                                 self.notches = tmpnotches
1062                                 self.compute_notch_taps(self.notches)
1063                                 if self.dual_mode == False and self.interferometer == False:
1064                                         self.notch_filt.set_taps(self.notch_taps)
1065                                 else:
1066                                         self.notch_filt1.set_taps(self.notch_taps)
1067                                         self.notch_filt2.set_taps(self.notch_taps)
1068
1069         def xydfunc_waterfall(self,pos):
1070                 lower = self.observing - (self.seti_fft_bandwidth / 2)
1071                 upper = self.observing + (self.seti_fft_bandwidth / 2)
1072                 binwidth = self.seti_fft_bandwidth / 1024
1073                 s = "%.6fMHz" % ((lower + (pos.x*binwidth)) / 1.0e6)
1074                 self.myform['spec_data'].set_value(s)
1075
1076         def toggle_cal(self):
1077                 if (self.calstate == True):
1078                   self.calstate = False
1079                   self.u.write_io(0,0,(1<<15))
1080                   self.calibrator.SetLabel("Calibration Source: Off")
1081                 else:
1082                   self.calstate = True
1083                   self.u.write_io(0,(1<<15),(1<<15))
1084                   self.calibrator.SetLabel("Calibration Source: On")
1085
1086         def toggle_annotation(self):
1087                 if (self.annotate_state == True):
1088                   self.annotate_state = False
1089                   self.annotation.SetLabel("Annotation: Off")
1090                 else:
1091                   self.annotate_state = True
1092                   self.annotation.SetLabel("Annotation: On")
1093         #
1094         # Turn scanning on/off
1095         # Called-back by "Recording" button
1096         #
1097         def toggle_scanning(self):
1098                 # Current scanning?      Flip state
1099                 if (self.scanning == True):
1100                   self.scanning = False
1101                   self.scan_control.SetLabel("Scan: Off")
1102                 # Not scanning
1103                 else:
1104                   self.scanning = True
1105                   self.scan_control.SetLabel("Scan: On ")
1106
1107         def set_pd_offset(self,offs):
1108                  self.myform['offset'].set_value(offs)
1109                  self.calib_offset=offs
1110                  x = self.calib_coeff / 100.0
1111                  self.cal_offs.set_k(offs*(x*8000))
1112
1113         def set_pd_gain(self,gain):
1114                  self.myform['dcgain'].set_value(gain)
1115                  self.cal_mult.set_k(gain*0.01)
1116                  self.calib_coeff = gain
1117                  x = gain/100.0
1118                  self.cal_offs.set_k(self.calib_offset*(x*8000))
1119
1120         def compute_notch_taps(self,notchlist):
1121                  tmptaps = Numeric.zeros(self.NOTCH_TAPS,Numeric.Complex64)
1122                  binwidth = self.bw / self.NOTCH_TAPS
1123
1124                  for i in range(0,self.NOTCH_TAPS):
1125                          tmptaps[i] = complex(1.0,0.0)
1126
1127                  for i in notchlist:
1128                          diff = i - self.observing
1129                          if int(i) == 0:
1130                                  break
1131                          if ((i < (self.observing - self.bw/2)) or (i > (self.observing + self.bw/2))):
1132                                  continue
1133                          if (diff > 0):
1134                                  idx = diff / binwidth
1135                                  idx = round(idx)
1136                                  idx = int(idx)
1137                                  if (idx < 0 or idx > (self.NOTCH_TAPS/2)):
1138                                          break
1139                                  tmptaps[idx] = complex(0.0, 0.0)
1140
1141                          if (diff < 0):
1142                                  idx = -diff / binwidth
1143                                  idx = round(idx)
1144                                  idx = (self.NOTCH_TAPS/2) - idx
1145                                  idx = int(idx+(self.NOTCH_TAPS/2))
1146                                  if (idx < 0 or idx >= (self.NOTCH_TAPS)):
1147                                          break
1148                                  tmptaps[idx] = complex(0.0, 0.0)
1149
1150                  self.notch_taps = numpy.fft.ifft(tmptaps)
1151
1152         #
1153         # Setup common pieces of radiometer mode
1154         #
1155         def setup_radiometer_common(self,n):
1156                 # The IIR integration filter for post-detection
1157                 self.integrator = gr.single_pole_iir_filter_ff(1.0)
1158                 self.integrator.set_taps (1.0/self.bw)
1159
1160                 if (self.use_notches == True):
1161                         self.compute_notch_taps(self.notches)
1162                         if (n == 2):
1163                                 self.notch_filt1 = gr.fft_filter_ccc(1, self.notch_taps)
1164                                 self.notch_filt2 = gr.fft_filter_ccc(1, self.notch_taps)
1165                         else:
1166                                 self.notch_filt = gr.fft_filter_ccc(1, self.notch_taps)
1167
1168
1169                 # Signal probe
1170                 self.probe = gr.probe_signal_f()
1171
1172                 #
1173                 # Continuum calibration stuff
1174                 #
1175                 x = self.calib_coeff/100.0
1176                 self.cal_mult = gr.multiply_const_ff(self.calib_coeff/100.0)
1177                 self.cal_offs = gr.add_const_ff(self.calib_offset*(x*8000))
1178
1179                 #
1180                 # Mega decimator after IIR filter
1181                 #
1182                 if (self.switch_mode == False):
1183                         self.keepn = gr.keep_one_in_n(gr.sizeof_float, self.bw)
1184                 else:
1185                         self.keepn = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/2))
1186
1187                 #
1188                 # For the Dicke-switching scheme
1189                 #
1190                 #self.switch = gr.multiply_const_ff(1.0)
1191
1192                 #
1193                 if (self.switch_mode == True):
1194                         self.vector = gr.vector_sink_f()
1195                         self.swkeep = gr.keep_one_in_n(gr.sizeof_float, int(self.bw/3))
1196                         self.mute = gr.keep_one_in_n(gr.sizeof_float, 1)
1197                         self.cmute = gr.keep_one_in_n(gr.sizeof_float, int(1.0e9))
1198                         self.cintegrator = gr.single_pole_iir_filter_ff(1.0/(self.bw/2))
1199                         self.cprobe = gr.probe_signal_f()
1200                 else:
1201                         self.mute = gr.multiply_const_ff(1.0)
1202
1203
1204                 self.avg_reference_value = 0.0
1205                 self.reference_level = gr.add_const_ff(0.0)
1206
1207         #
1208         # Setup ordinary single-channel radiometer mode
1209         #
1210         def setup_normal(self, setimode):
1211
1212                 self.setup_radiometer_common(1)
1213
1214                 self.head = self.u
1215                 if (self.use_notches == True):
1216                         self.shead = self.notch_filt
1217                 else:
1218                         self.shead = self.u
1219
1220                 if setimode == False:
1221
1222                         self.detector = gr.complex_to_mag_squared()
1223                         self.connect(self.shead, self.scope)
1224
1225                         if (self.use_notches == False):
1226                                 self.connect(self.head, self.detector, self.mute, self.reference_level,
1227                                         self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1228                         else:
1229                                 self.connect(self.head, self.notch_filt, self.detector, self.mute, self.reference_level,
1230                                         self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1231
1232                         self.connect(self.cal_offs, self.probe)
1233
1234                         #
1235                         # Add a side-chain detector chain, with a different integrator, for sampling
1236                         #   The reference channel data
1237                         # This is used to derive the offset value for self.reference_level, used above
1238                         #
1239                         if (self.switch_mode == True):
1240                                 self.connect(self.detector, self.cmute, self.cintegrator, self.swkeep, self.cprobe)
1241
1242                 return
1243
1244         #
1245         # Setup dual-channel (two antenna, usual orthogonal polarity probes in the same waveguide)
1246         #
1247         def setup_dual(self, setimode):
1248
1249                 self.setup_radiometer_common(2)
1250
1251                 self.di = gr.deinterleave(gr.sizeof_gr_complex)
1252                 self.addchans = gr.add_cc ()
1253                 self.detector = gr.add_ff ()
1254                 self.h_power = gr.complex_to_mag_squared()
1255                 self.v_power = gr.complex_to_mag_squared()
1256                 self.connect (self.u, self.di)
1257
1258                 if (self.use_notches == True):
1259                         self.connect((self.di, 0), self.notch_filt1, (self.addchans, 0))
1260                         self.connect((self.di, 1), self.notch_filt2, (self.addchans, 1))
1261                 else:
1262                         #
1263                         # For spectral, adding the two channels works, assuming no gross
1264                         #       phase or amplitude error
1265                         self.connect ((self.di, 0), (self.addchans, 0))
1266                         self.connect ((self.di, 1), (self.addchans, 1))
1267
1268                 #
1269                 # Connect heads of spectral and total-power chains
1270                 #
1271                 if (self.use_notches == False):
1272                         self.head = self.di
1273                 else:
1274                         self.head = (self.notch_filt1, self.notch_filt2)
1275
1276                 self.shead = self.addchans
1277
1278                 if (setimode == False):
1279                         #
1280                         # For dual-polarization mode, we compute the sum of the
1281                         #       powers on each channel, after they've been detected
1282                         #
1283                         self.detector = gr.add_ff()
1284
1285                         #
1286                         # In dual-polarization mode, we compute things a little differently
1287                         # In effect, we have two radiometer chains, terminating in an adder
1288                         #
1289                         if self.use_notches == True:
1290                                 self.connect(self.notch_filt1, self.h_power)
1291                                 self.connect(self.notch_filt2, self.v_power)
1292                         else:
1293                                 self.connect((self.head, 0), self.h_power)
1294                                 self.connect((self.head, 1), self.v_power)
1295                         self.connect(self.h_power, (self.detector, 0))
1296                         self.connect(self.v_power, (self.detector, 1))
1297                         self.connect(self.detector, self.mute, self.reference_level,
1298                                 self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1299                         self.connect(self.cal_offs, self.probe)
1300                         self.connect(self.shead, self.scope)
1301
1302                         #
1303                         # Add a side-chain detector chain, with a different integrator, for sampling
1304                         #   The reference channel data
1305                         # This is used to derive the offset value for self.reference_level, used above
1306                         #
1307                         if (self.switch_mode == True):
1308                                 self.connect(self.detector, self.cmute, self.cintegrator, self.swkeep, self.cprobe)
1309                 return
1310
1311         #
1312         # Setup correlating interferometer mode
1313         #
1314         def setup_interferometer(self, setimode):
1315                 self.setup_radiometer_common(2)
1316
1317                 self.di = gr.deinterleave(gr.sizeof_gr_complex)
1318                 self.connect (self.u, self.di)
1319                 self.corr = gr.multiply_cc()
1320                 self.c2f = gr.complex_to_float()
1321
1322                 self.shead = (self.di, 0)
1323
1324                 # Channel 0 to multiply port 0
1325                 # Channel 1 to multiply port 1
1326                 if (self.use_notches == False):
1327                         self.connect((self.di, 0), (self.corr, 0))
1328                         self.connect((self.di, 1), (self.corr, 1))
1329                 else:
1330                         self.connect((self.di, 0), self.notch_filt1, (self.corr, 0))
1331                         self.connect((self.di, 1), self.notch_filt2, (self.corr, 0))
1332
1333                 #
1334                 # Multiplier (correlator) to complex-to-float, followed by integrator, etc
1335                 #
1336                 self.connect(self.corr, self.c2f, self.integrator, self.keepn, self.cal_mult, self.cal_offs, self.chart)
1337
1338                 #
1339                 # FFT scope gets only 1 channel
1340                 #  FIX THIS, by cross-correlating the *outputs* of two different FFTs, then display
1341                 #  Funky!
1342                 #
1343                 self.connect(self.shead, self.scope)
1344
1345                 #
1346                 # Output of correlator/integrator chain to probe
1347                 #
1348                 self.connect(self.cal_offs, self.probe)
1349
1350                 return
1351
1352         #
1353         # Setup SETI mode
1354         #
1355         def setup_seti(self):
1356                 self.connect (self.shead, self.fft_bandpass, self.scope)
1357                 return
1358
1359
1360
1361 def main ():
1362         app = stdgui2.stdapp(app_flow_graph, "RADIO ASTRONOMY SPECTRAL/CONTINUUM RECEIVER: $Revision$", nstatus=1)
1363         app.MainLoop()
1364
1365 if __name__ == '__main__':
1366         main ()