[time-nuts] is there a cheap and simple way to measure OCXOs?

Hi, I recently bought some Oscilloquartz 8663 from ebay and am now wondering how to check whether they are working correctly or whether they are out of specs. Unfortunately, although i have a reasonable park of measurement instruments, none of them are in the precision range that i'd need to

Re: [time-nuts] is there a cheap and simple way to measure OCXOs?

On 5/30/12 6:11 AM, Attila Kinali wrote: Hi, I recently bought some Oscilloquartz 8663 from ebay and am now wondering how to check whether they are working correctly or whether they are out of specs. Unfortunately, although i have a reasonable park of measurement instruments, none of them are

[time-nuts] Ofcom Update: UK GPS Jamming Notice

I have received the following notice: __ NOTIFICATION OF GPS JAMMING EXERCISES RAF SPADEADAM, CUMBRIA, SEPTEMBER 2012 Dates: Between the 10th of Sept to the 14th of Sept 2012 inclusive. Times: 0700 -2000 GMT. Location of MULTIPLE jammers: Land

Re: [time-nuts] is there a cheap and simple way to measure OCXOs?

On Wed, 30 May 2012 07:18:12 -0700 Jim Lux jim...@earthlink.net wrote: Got a mixer around, so you can beat them against each other (or against your 5680)? Not yet. I'm currently thinking about geting an mixer from minicircuits for the ZX05-1L[1] and a low pass filter BLP-1.9[2]. But what

Re: [time-nuts] is there a cheap and simple way to measure OCXOs?

Unfortunately, although i have a reasonable park of measurement instruments, none of them are in the precision range that i'd need to characterize the 8663's. I have three oscilloscopes (analog 20MHz, digital 200MHz and 1GHz), a cheap handheld frequency counter and a couple of multimeters

Re: [time-nuts] is there a cheap and simple way to measure OCXOs?

On Wed, May 30, 2012 at 7:59 AM, Attila Kinali att...@kinali.ch wrote: On Wed, 30 May 2012 07:18:12 -0700 Jim Lux jim...@earthlink.net wrote: But what then? The frequency offset is low enough that it is still problematic to measure with standard measurements instruments. And the phase

Re: [time-nuts] [armyradios] Re: MY ADDRESS BOOK HAS BEEN STOLEN ! DO NOT CLICK ON LINK !!!

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Re: [time-nuts] is there a cheap and simple way to measure OCXOs?

Hi For phase noise of this class OCXO, the easy way is to hook up an RPD-1 running into an OP-37. Set up the op amp for about 20 db gain in a non-inverting configuration. RF isolation amps should not be needed in this case. Run a second op amp with variable gain, and a pot for offset off of the

Re: [time-nuts] is there a cheap and simple way to measure OCXOs?

If you can offset one enough to have the output from the dbm in the audio band, you could use a sound card based spectrum analyzer to evaluate phase noise. Some sound cards may work down to 10 Hz, but their performance there is usually not specified. Bruce Griffiths has information on some high

Re: [time-nuts] is there a cheap and simple way to measure OCXOs?

HI In the on the cheap category, you are probably better to simply ignore the 2 to 10 Hz region and skip to one of Bert's DMTD's for the close in stuff. Bob On May 30, 2012, at 4:39 PM, shali...@gmail.com wrote: If you can offset one enough to have the output from the dbm in the audio