From: "Randy Warner" <[EMAIL PROTECTED]> Subject: Re: [time-nuts] iLotus M12M Timing receiver Date: Mon, 18 Dec 2006 08:53:48 -0800 Message-ID: <[EMAIL PROTECTED]>
> Magnus, Randy, > 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. It moved several 10s of Hz according to the readout by my "healing palm" action. Maybe I just didn't hold it long enought to fall back. > 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. Well, I assumed that there was no sensor located there, but I thought that maybe there still is a place to mount it so I just have to solder one in. In that case I would like to get the coordinates so I could log it. In the end I will make sure it sits in a more stable environment than on the top of my desk. BTW. Do you know if the time offset between the old M12+ and the new M12M as reported has been compensated out or not? I don't have the golden M12+ reference unit in my hands, so... Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
