Re: [time-nuts] AD9912 DDS frequency resolution measurement (and OT LTC6957)

Am 19.02.19 um 12:29 schrieb Bo Hansen: Hi I have experience with the AD9912 in this H/W and S/W implementation: But I must admit that I personally haven't measured the minimum frequency step size. Poul-Henning Kamp, among others, is using one of the

Re: [time-nuts] Help needed with Tracor 308A Rubidium Frequency Standard

Hi With any Rb, the first question is if the ovens are running and cutting back properly. There *should* be some sort of oven monitor settings on the switch. It’s a reasonable bet that < 1 hr is needed to get them to cut back. The gotcha is that if they don’t cut back you start to fry

Re: [time-nuts] AD9912 DDS frequency resolution measurement?

> A friend of mine has a x96 multiplier from 108 MHz to 10 GHz but we don't > have access to any counters capable if measuring the difference. For sanity-checking an extremely small frequency discrepancy, perhaps you could set up the DDS to output a signal very close to a plesiochronous reference

[time-nuts] Help needed with Tracor 308A Rubidium Frequency Standard

Hello to the group, out of an estate I got a Tracor 308A and plugged it in. As I already expected UNLOCK is lit. Well without any documentation I am lost. I hear a relay click every couple seconds and the uA meter starts at zero but current slowly increases and pegs the left stop (>50uA)

[time-nuts] Venus timing receiver PPS output

I recently add the ability to Lady Heather to monitor a PPS output and apply sawtooth correction sto the measured PPS and log the results. The Venus timing receivers tout a PPS output with +/- 6 nsec PPS jitter and sawtooth corrections. Alas, the PPS output does not appear to meet this claim.

Re: [time-nuts] AD9912 DDS frequency resolution measurement?

Hi I have experience with the AD9912 in this H/W and S/W implementation: But I must admit that I personally haven't measured the minimum frequency step size. Poul-Henning Kamp, among others, is using one of the AD9912 DDS units and observed a similar