Re: [time-nuts] Tboltmon Serial Port Selection...??

I followed up a hunch after browsing through the sample code they supply for TBCHAT. John Miles wrote: Thanks! How'd you find that option? -- john, KE5FX -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Stephen Tompsett Sent: Friday, March 28,

[time-nuts] Another Trimble Tbolt question....

Hello, All-- Thanks to the collective savvy of this list and the patient assistance of Ken Winterling wa2lbi I was finally able to get my Tbolt to stop requiring me to configure the COM-4 channel every time I ran the monitoring software. So-- I had such good luck with that question, I'm going to

Re: [time-nuts] Another Trimble Tbolt question....

Mike, A quick answer to this - two reasons why... 1) Your Thunderbolt is using WGS84 coordinate system and not USGS, and.. 2) The altitude fix is usually the most inaccurate parameter, as it is very unlikely that you have a GPS bird directly overhead. Think of your position fix as you sitting

Re: [time-nuts] Racal-Dana 1992 switches

This topic has been addressed earlier; though with some debate. I have proposed a simple heterodyne scheme for beating 2 stable sources against each other observing a 1KHz difference frequency to resolve 1uHz deltas. This is NOT a state-of-the-art scheme, but it will provide better than 1E-12

Re: [time-nuts] Racal-Dana 1992 switches

How do you pick the optimal difference frequency? I see that 1kHz has a nice numerical property where you can read the frequency directly off the counter, you just need to mentally prepend the first 4 digits. With computers it's not that important, the difference can easily be a strange

[time-nuts] FS Trimble Ace-III Gps Receiver.

I have for sale Two Trimble Ace-III Gps receivers. Asking $30.00 each to include shipping to lower 48. Further information is available at: http://trl.trimble.com/docushare/dsweb/Get/Document-1883/ace%20iii.pdf If interested contact me off list at: [EMAIL PROTECTED] Bruce W1GBS

Re: [time-nuts] Racal-Dana 1992 switches

Bill, I guess my reason for wanting to see beyond 0.001 Hz is the usual, I have reached a limit and wonder if the equipment I have is capable of more, if I just understood the more esoteric functions I seldom use. The Racal seems like my scientific calculator.. lots of shift functions that might

[time-nuts] FS Trimble ACE-III GPS Receiver

I have for sale Two Trimble Ace-III Gps receivers. Asking $30.00 each to include shipping to lower 48. Further information is available at: http://trl.trimble.com/docushare/dsweb/Get/Document-1883/ace%20iii.pdf If interested contact me off list at: [EMAIL PROTECTED] Bruce W1GBS

Re: [time-nuts] Racal-Dana 1992 switches

Jeff, There's nothing magic about 1KHz as the heterodyne frequency. I picked it to avoid power line pickup permit a tuned circuit to limit the noise bandwidth. But, any tuned circuit in the signal path will have temperature driven phase variations possibly signal level phase variations, as

Re: [time-nuts] Racal-Dana 1992 switches

Jeff Mock wrote: How do you pick the optimal difference frequency? I see that 1kHz has a nice numerical property where you can read the frequency directly off the counter, you just need to mentally prepend the first 4 digits. With computers it's not that important, the difference can