Magnus, The oscillator should not be moving too much as the M12M has a TCXO instead of the crystals used on the earlier models. The TCXO is actually much more stable under temperature changes, but it will react a little to a step change such as putting your finger on it. It should drift off a little and then come right back. We all wish that Motorola had seen fit to enclose the RF components and TCXO under a shield can like most everyone else does..... That's why we sell a lot of our industrial customers shield cans. Another trick is to put a little chunk of foam backed tape over either the crystal or TCXO.
The temp sensor on the M12M is non-functional as there is no sensor in the new RF front end. Temp should always read 00.0. Randy ________________________________________________________________________ _____________________________ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Magnus Danielson Sent: Sunday, December 17, 2006 5:20 PM To: time-nuts@febo.com Subject: [time-nuts] iLotus M12M Timing receiver Hi! On friday my iLotus M12M Timing GPS receiver. The Synergy GPS development pack suited my needs very well and it didn't take long to have it up and running, just what I needed after a hard day of work. I have been running the WinOncore12 software and have noticed that the Oscillator Offset is clearly temperature dependent. By just laying the palm of my hand over the board, the frequency steadilly ticks up and as I pull it away it goes the other way around, down. There is a temperature reading there which sits quite at 00.0 degrees C. Is the temperature sensor not mounted or what? What model would it be and where should I put it then? Since I yeat have to do some N-MMCX cabeling exercises I use the small patch- antenna that came with it rather than the antenna on the roof. Therefore I have not been able to track all visible satelites since, well, the skyview has been quite limited. It has done a pretty good job never the less. What I do like with the development board is that I get clean RS-232 as well as a separate PPS on SMA. Getting started and hooking it up to other things is pretty straight forward and thus highly recommended. While the WinOncore12 is a nice tool to get started with, I won't be using that on a continous basis. I may use it for post-processing purposes thought. Once I've relocated it and hooked it up to the big antenna and started some comparative measurements I'll report back. I need to do some rearrangements in the lab regardless. Cheers, Magnus _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts