I had an interesting problem this weekend when launching. I would turn on the TeleMetrum on the pad, open up the software on the computer, and get a good signal and have no problem reading the telemetry from the board. However, after a few minutes (5-10?) the computer appeared to quit receiving data (the age would start to climb). I would try to restart the software, but when I went to monitor flight, it would show N0CALL in the callsign window. I went out to the pad, and the TeleMetrum was still beeping as it should, so I turned off the avionics, took down the rocket, opened up the avbay, checked everything through the USB port (all seemed OK), put it back on the pad, turned it on, started up the software, and regained telemetry. However, after 5--10 min I again lost telemetry and couldn't get it back. I went ahead and launched the rocket as I was flying with a Raven 2 and using TeleMetrum deployment as backup, and I didn't expect the flight to go OOS. It flew very well, data file downloaded post flight showed that all events occurred as planned (all charges went off), and it had an accurate GPS track as well. So aside from telemetry, all appeared to be just fine. Unfortunately, I didn't have another computer/dongle to see if that would receive signals from the rocket.
I have flown this rocket several times now, always with a Raven/TeleMetrum combo, and it has worked splendidly everytime (except for the flight before it was known to need the battery mod- all my batteries have the protection circuit removed now). Never had any trouble receiving before. I haven't had a chance to test it at home yet. It was hot on Saturday, but no hotter than the launchesd in June and July, both of which were perfect. Any thoughts on what is happening? I will update once I am able to do some further tests at home (and get accurate time to loss-of-signal, if I can duplicate the problem. Regards, David
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