Re: Win11 ??
"David McClain (as dbm at refined-audiometrics dot com)" <[email protected]>
| Newsgroups | gmane.lisp.lispworks.general |
|---|---|
| Message-ID | <[email protected]> |
Interesting calculation… are you suspecting that my SRS FS740 GPS-OCXO is using a 32-bit counter at 1 MHz to derive its drift corrections? Maybe… I know that they used Z80 technology in my standalone SRS PRS-10 Rb Reference Oscillator. I was impressed at how much they could get out of ancient technology. Maybe they did the same with the FS-740? I have their older model FS-740, not the most recent, which can also work with GLONASS and GPS, and several others. So mine might just have a Z80 inside. I would think that the update rate really depends on the drift rate of the OCXO. And that has to vary with age. - DM > On Sep 3, 2025, at 13:14, Yuri Davidovsky <[email protected]> wrote: > > > >> On 3 Sep 2025, at 21:58, David McClain <[email protected]> wrote: >> >> In terms of DDS word-size, I would expect that the Agilent and Siglent are using 48+ bits of precision. The Icom RX is probably using a 32-bit counter. >> >> … >> >> … and I just saw my first glitch with Agilent after waiting about 50 minutes. We’ll see if it happens again in 76 minutes… > > Ok, I just did some napkin calculations and it appears that > > <image0.jpeg> > > = 71.5, which is 71.5 minutes for a cycle counter that counts cycles at 1MHz when the counter size is 32 bits.