The telemetrum seems to take a very long time to acquire enough satellites to get a position lock, perhaps 15 minutes or so. The telemega installed in the same rocket instead takes only a minute or two at most. I think they use different GPS receivers, so it's not just RFI that makes the telemetrum take an age to get GPS lock.
Once locked, the performance of the telemetrum is very good. Someone mentioned that the telemetrum connector screws are very small - they are, but Wera Tools make very good quality screwdrivers that fit the screws perfectly. I did try grinding down an oversize screwdriver but failed to heat treat it correctly and the blade was too brittle - just buy a good quality screwdriver instead. Kieran > On 13 Jul 2015, at 06:54, Max McHatton <[email protected]> wrote: > > I like your design. But if you are having RFI problems; you may have to put > the electronics in separate and shielded bays. I did that with my last > rocket. I put my BeeLine in a nosecone bay, to keep it away from the > TeleMetrum. > > > From: altusmetrum [mailto:[email protected]] On Behalf Of > Chris Attebery > Sent: July 12, 2015 11:43 > To: Altus Metrum > Subject: [altusmetrum] How long does it normally take to get GPS lock? > > Hey guys, > > I finished my altimeter bay integration last night. I fired up the Telemetrum > 2.0 by itself and it took 5-10 minutes for it to get GPS lock. I turned it > off and then turned on my camera and Missile Works RRC2+ before turning on > the Telemetrum on this time I let it sit for 6 minutes and it never found any > satellites and never got a lock. > > I have the camera board shielded but the camera module is unshielded and near > the Telemetrum. I've been told that writing to the SD card on the camera > produces a lot of noise and can interfere with GPS signals. Any suggestions? > > > > _______________________________________________ > altusmetrum mailing list > [email protected] > http://lists.gag.com/mailman/listinfo/altusmetrum
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