With response to the previous question regarding clock source: Dan, do you find a difference in feeding of the clock source, be it a sine wave -or- a square wave ? For example, do you see any increase in S/N or sensitivity when fed by a square wave as opposed to a sine, and when clocking is fed by sine, do you see an increase in jitter ?
On Tue, Dec 1, 2020 at 1:22 PM luis javier Ulloa <[email protected]> wrote: > Hi Dan > I appreciate your recommendation, now I understand better, I think very > expensive equipment is not necessary. > Well, I would like to have my portable system and I didn't know which > generator to use as a clock signal. > Cheers > Javier Ulloa > > El mar, 1 dic 2020 a las 13:52, Dan Werthimer (<[email protected]>) > escribió: > >> >> >> hi javier, >> >> most casper ADC boards want a 0dBm sine wave. square wave is fine too. >> with frequency at the adc sample rate, or perhaps 1/2 sample rate if the >> ADC is interleaved. >> >> i like the small ~$500 synthesizers from DS instruments: >> >> https://www.dsinstruments.com/store/products/category/rf-signal-generators/ >> >> for a less expensive synth, i like this $100 synth: >> https://www.aliexpress.com/item/32723868163.html >> >> for a synth that always powers up to a frequency stored in it's flash, >> (eg: for an instrument, not lab bench use) many casper people use valon >> technologies synths. >> eg: https://www.valonrf.com/frequency-synthesizer-6ghz.html >> >> >> best wishes, >> >> dan >> >> >> >> >> Dan Werthimer >> Marilyn and Watson Alberts Chair >> Astronomy Dept and Space Sciences Lab >> University of California, Berkeley >> >> >> On Tue, Dec 1, 2020 at 11:36 AM luis javier Ulloa < >> [email protected]> wrote: >> >>> Hello everyone, I hope you are well. >>> I am working with a ROACH2 and I had a question, what clock signal do >>> you use for your ADC, and I would like to know if you know of any signal >>> generator that is portable? >>> best regards >>> Javier Ulloa >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "[email protected]" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/5b03334e-61d8-4333-bd20-fa53fc3cffc6n%40lists.berkeley.edu >>> <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/5b03334e-61d8-4333-bd20-fa53fc3cffc6n%40lists.berkeley.edu?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "[email protected]" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGHS_vFxx%3DGsfVo-ZGG1CydRKdpXw2Xh2_8TwHoXWG479Z--Cg%40mail.gmail.com >> <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGHS_vFxx%3DGsfVo-ZGG1CydRKdpXw2Xh2_8TwHoXWG479Z--Cg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CALo%3DeSJmvO4kXXb4ZVq2zPFnBdpHrzEC-yFJ5qaLSLRYTkaNhQ%40mail.gmail.com > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CALo%3DeSJmvO4kXXb4ZVq2zPFnBdpHrzEC-yFJ5qaLSLRYTkaNhQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- -Daniel Blakley -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAJa6%3DL1zuaghCE6AP-MBOyjPPbienHJHagSNGTUTDKNb2Lj%3Ddw%40mail.gmail.com.
