- ==== RF Calibration
-
- The radios in every Altus Metrum device are calibrated
- at the factory to ensure that they transmit and
- receive on the specified frequency. If you need to
- you can adjust the calibration by changing this value.
- Do not do this without understanding what the value
- means, read the appendix on calibration and/or the
- source code for more information. To change a
- TeleDongle's calibration, you must reprogram the unit
- completely.
-
- ==== Telemetry/RDF/APRS Enable
-
- Enables the radio for transmission during
- flight. When disabled, the radio will not
- transmit anything during flight at all.
-
- ==== Telemetry baud rate
-
- This sets the modulation bit rate for data
- transmission for both telemetry and packet
- link mode. Lower bit rates will increase range
- while reducing the amount of data that can be
- sent and increasing battery consumption. All
- telemetry is done using a rate 1/2 constraint
- 4 convolution code, so the actual data
- transmission rate is 1/2 of the modulation bit
- rate specified here.
-
- ==== APRS Interval
-
- How often to transmit GPS information via APRS
- (in seconds). When set to zero, APRS
- transmission is disabled. This option is
- available on TeleMetrum v2 and TeleMega
- boards. TeleMetrum v1 boards cannot transmit
- APRS packets. Note that a single APRS packet
- takes nearly a full second to transmit, so
- enabling this option will prevent sending any
- other telemetry during that time.
-
- ==== APRS SSID
-
- Which SSID to report in APRS packets. By
- default, this is set to the last digit of the
- serial number, but can be configured to any
- value from 0 to 9.
-
- ==== Callsign
-
- This sets the call sign included in each
- telemetry packet. Set this as needed to
- conform to your local radio regulations.
-
- ==== Maximum Flight Log Size
-
- This sets the space (in kilobytes) allocated
- for each flight log. The available space will
- be divided into chunks of this size. A smaller
- value will allow more flights to be stored, a
- larger value will record data from longer
- flights.
-
- ==== Ignitor Firing Mode
-
- This configuration parameter allows the two standard ignitor
- channels (Apogee and Main) to be used in different
- configurations.
-
- Dual Deploy::
- This is the usual mode of operation; the
- 'apogee' channel is fired at apogee and the
- 'main' channel at the height above ground
- specified by the 'Main Deploy Altitude' during
- descent.
-
- Redundant Apogee::
- This fires both channels at apogee, the
- 'apogee' channel first followed after a two
- second delay by the 'main' channel.
-
- Redundant Main::
- This fires both channels at the height above
- ground specified by the Main Deploy Altitude
- setting during descent. The 'apogee' channel
- is fired first, followed after a two second
- delay by the 'main' channel.
-
- ==== Pad Orientation
-
- Because they include accelerometers,
- TeleMetrum, TeleMega and EasyMega are
- sensitive to the orientation of the board. By
- default, they expect the antenna end to point
- forward. This parameter allows that default to
- be changed, permitting the board to be mounted
- with the antenna pointing aft instead.
-
- Antenna Up::
- In this mode, the antenna end of the flight
- computer must point forward, in line with the
- expected flight path.
-
- Antenna Down::
- In this mode, the antenna end of the flight
- computer must point aft, in line with the
- expected flight path.
-
- ==== Beeper Frequency
-
- The beeper on all Altus Metrum flight
- computers works best at 4000Hz, however if you
- have more than one flight computer in a single
- airframe, having all of them sound at the same
- frequency can be confusing. This parameter
- lets you adjust the base beeper frequency
- value.
-
- ==== Configure Pyro Channels
-
- image::configure-pyro.png[width="5.5in"]
-
- This opens a separate window to configure the
- additional pyro channels available on TeleMega
- and EasyMega. One column is presented for
- each channel. Each row represents a single
- parameter, if enabled the parameter must meet
- the specified test for the pyro channel to be
- fired.
-
- Select conditions and set the related value;
- the pyro channel will be activated when *all*
- of the conditions are met. Each pyro channel
- has a separate set of configuration values, so
- you can use different values for the same
- condition with different channels.
-
- At the bottom of the window, the 'Pyro Firing
- Time' configuration sets the length of time
- (in seconds) which each of these pyro channels
- will fire for.
-
- Once you have selected the appropriate
- configuration for all of the necessary pyro
- channels, you can save the pyro configuration
- along with the rest of the flight computer
- configuration by pressing the 'Save' button in
- the main Configure Flight Computer window.
-
- include::pyro-channels.raw[]