Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-18 Thread SAIDJACK
Hi Bob, thanks for the specs!! For some reason this unit is slightly different though in it's specs: It only uses +24V, no negative input provided by the Wavecrest PS. If you are right, the -5.2V is only applied to the output to bias it, which is not needed. The -5.2V pin is left floating

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Rick Karlquist
Stephan Sandenbergh wrote: >> charts, it is my guess that the loop bandwidth will be in the order of > 1kHz. > Thus, if I can't modulate the 100MHz OCXO at this rate, I will have to > think > of another plan. > First of all. realize that the modulation bandwidth of the VCO has to be at least 10 ti

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread SAIDJACK
Hi Stephan, I have a surplus 100MHz Vectron OCXO from a Wavecrest DTS-2070 jitter-measurement system that was de-comissioned due to CPU memory failure. The oscillator works great, and it was the main timebase in the $90K+ jitter instrument, so I suspect it's the "best" OCXO they could buy

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Robert Crawford
Poul-Henning, Since the cost of the SC-10 gets pretty high if you go for all the best options, I only specified one "A" grade parameter: 2 x 10E-12 Allan variation combined with lowest phase noise. Otherwise the operating temp is 0-50 C, total temperature stability is 2 x 10E-9 over 0-50 C,

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Stephan Sandenbergh
time and frequency measurement > Subject: Re: [time-nuts] Typical EFC frequency response (bandwidth) of a > OCXO > > In message <[EMAIL PROTECTED]>, Robert Crawford writes: > > >I bought a Stanford Research SC-10 directly from the factory about 6 > >months ag

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, Robert Crawford writes: >I bought a Stanford Research SC-10 directly from the factory about 6 >months ago, but now I know I don't have the equipment to really test the >stability of this oscillator. > >Has anyone had a good look at the SC-10 (tvb?). It depends a

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, Magnus Danielson writes: >Stephan, > >If you can't find it explicitly I strongly recommend you to measure it. What >Poul-Henning suggested is about right, however you would like to have a FM >detector (not AM or PM) of sufficient bandwidth. I used my Sony AIR 7 rece

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Magnus Danielson
Stephan, If you can't find it explicitly I strongly recommend you to measure it. What Poul-Henning suggested is about right, however you would like to have a FM detector (not AM or PM) of sufficient bandwidth. A frequency sweep through that should work well and display the amplitude responce vs fr

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Robert Crawford
Stephan, I'm still new at this subject and I'm not an expert, but here's what I've found. The SC-10 oscillator from Stanford Research has this paragraph in the manual: "The EFC input exhibits a single-pole RC type response with a -3dB point of about 3kHz when driven by a voltage source with a

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Poul-Henning Kamp
In message <[EMAIL PROTECTED]>, "Stephan Sandenbergh" writes: >The modulation bandwidth isn't given in the typical OCXO datasheet. Is there >a reason for this? Has anyone got experience with this? Or does number vary >wildly from OCXO to OCXO. I played with it a bit once, hooking a function gener

Re: [time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Jason Rabel
If not in the public data sheets (the few OCXO's that I have state that info in their sheets), you should be able to contact the manufacturer and they can tell you. If they are no longer in business or it is a no longer supported model, then you would have to manually test the OCXO to find the band

[time-nuts] Typical EFC frequency response (bandwidth) of a OCXO

2006-12-16 Thread Stephan Sandenbergh
Hi, Many thanks to all the time-nuts that has answered my questions, which I posted during the past year so, with such eloquence. My question I have today is regarding the modulation bandwidth of the typical OCXO. Previously, I was concerned with locking a 1PPS GPS output to a 10MHz OCXO. T