Plugger Lockett <[email protected]> writes: > Hi Keith, > > Apologies for spamming the mailing list but I've had some time today to > look into a few things and that's brought up a couple questions. > > Above you mentioned that it's possible to have both APRS and the telemetry > digital protocol running concurrently on some systems. After consulting the > manual it appears the option is available only on TeleMetrum v2 and > TeleMega boards. To confirm, the TeleGPS (v1 or v2) aren't capable of APRS? > I'd have a look at my TeleGPS v1.0 board but I'm in the office at the > moment.
TeleGPS, both v1 and v2, can also send APRS. The only devices which could not are TeleMetrum v1 boards which used a radio part incapable of the long transmission times necessary for APRS. > In the Altusmetrum manual you mention "a single APRS packet takes nearly a > full second to transmit, so enabling this option will prevent sending any > other telemetry during that time." Given that do you have any > recommendations regarding transmission frequency? I'd expect once every 5 > seconds would suffice and still leave a decent chuck of transmission for in > flight telemetry. But any advice would be appreciated. That's what I use. Note that APRS is sent during ascent, unlike the RDF beacons which are suppressed during that portion of the flight. > Finally, I expect to use my Yaesu VX-8GR for ground station/APRS TNC > duties. I use it for Big Red Bee comms and it works fine. Given the > documentation comments on APRS Format I expect to need to enable the > compressed format as you highlight it as a requirement for comms with the > newer Yaesu FT1D. But the TeleMega screenshot in the manual doesn't show a > line for "APRS Format". Just confirming that if I do have a device that's > APRS capable the configuration for the "APRS Format" field would indeed > reside in the "Configure Altimeter" window. Yes, you should see APRS Interval, APRS SSID and APRS format fields in the 'Configure Altimeter' window. Let me know if there's something wrong with the UI in your case; I've just checked with TeleGPS v1.0 and AltosUI running 1.8.6. -- -keith
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