Matthew, Don't pull off the batteries! The boards are populated differently for battery/non-battery uses. Your external battery will not be connected to the onboard RAM.
That being said, not using batteries might be a good solution. First, the old lithiums currently on the receivers are probably on their last legs anyway. Secondly, as you mentioned, pulling power is a good easy way to reset the GT+ receiver to binary with all messages disabled. This is the way timing receivers are normally used because TTFF is not usually a concern, and it eliminates the headache of replacing batteries out in the field. Can you imagine every TDMA cell-site needing new batteries every 5-10 years? One last item - Even without a battery a VP will save its setup information through power cycles because the older Moto receivers such as the VP save this information in EEPROM. To default these receivers you need to explicitly send the binary default command. Randy Warner -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Smith Sent: Wednesday, April 02, 2008 7:10 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Connecting my Oncores Quoth randy warner at 2008-04-03 11:09... <snip> > The battery can indeed cause some problems if you don't have the software > necessary to reset the receiver to a known state. The simplest thing to do > is get a copy of Rick Hambly's TAC32 at cnssys.com. TAC32 will light up just > about any Moto receiver ever made no matter what state it is in. </snip> Thanks Randy; I just downloaded TAC32 and it's got one of my catatonic GT+s talking to me now. I'll leave it to its devices for a while longer and then try the other one. I'm going to be mounting all the modules with interface and power supply boards and will be feeding backup power from an AA-size lithium battery. So, those on-board batteries will be coming OFF! If anything goes wrong then, I can just power down, pop out the backup battery (or unplug the module) and hopefully get back to a default state. Now I discover that I don't have a good sky view so think that I'll have to wait until the builder finally turns up (already 6 months late) and can get my antennas up on the ridge cap. Cheers M -- Matthew Smith Smiffytech - Technology Consulting & Web Application Development Business: http://www.smiffytech.com/ Personal: http://www.smiffysplace.com/ LinkedIn: http://www.linkedin.com/in/smiffy _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
