In a message dated 4/22/2007 12:55:08 Pacific Daylight Time, [EMAIL PROTECTED] writes:
>John, >The PRS10 has a phase noise spec of -130dBc at 10Hz distance. The >only way for me to measure this is with a Wavecrest 2075 and the >PRS10 was not a expected. It was not better than my R&S SMX. Trying >to find out why I found the spurious which also are seen by the >Wavecrest. I will filter the spurious out of coarse and re-measure >but are at least surprised to find this frequency spectrum. >I know that there are more PRS10 owners with the time-nuts, I expect >them to be phase-noise-nuts as well. Henk Hi Henk, great to hear that you got a Wavecrest DTS-2075!! That machine can detect spurs that phase noise measurements are oblivious too. Spurs cause nasty deterministic jitter of course. That must have been the unit for sale on Ebay for $900? Attached is a PRS-10 phase noise plot I measured here with a TSC-5120A unit. You can see pretty low spurs, but only a 100KHz measurement range. One would think to have a perfect oscillator until plugging in the PRS-10 into the Wavecrest... BTW: do you have Visi for windows by any chance? I have two DTS units, one with about 2.7ps jitter on the 100MHz output another with about 3ps. I wonder if replacing the internal Vectron 100MHz OCXO (which really is very low tech - I opened one and it actually uses a CA3130 as the oven controller :( ) would improve the unit's performance?? thanks, bye, Said ************************************** See what's free at http://www.aol.com.
PRS10_phase_noise.pdf
Description: Adobe PDF document
_______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
