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