[time-nuts] Measurement of frequency of HP 8720D option 1D5oscillator after switch on

Magnus Danielson magnus at rubidium.dyndns.org
Sun Oct 5 03:22:24 EDT 2014


If I was not traveling today I would have made 5370/SR620/CNT90/DTS2070 comparison measurements. I have done some before, but I am not sure that I still have the traces.

There are two measurements to be made, one on sine trigger and one on square trigger. I use a modified TADD-2 to square up.


<div>-------- Originalmeddelande --------</div><div>Från: "Dr. David Kirkby (Kirkby Microwave Ltd)" <drkirkby at kirkbymicrowave.co.uk> </div><div>Datum:05-10-2014  08:33  (GMT+01:00) </div><div>Till: Discussion of precise time and frequency measurement <time-nuts at febo.com>,Tom Van Baak <tvb at leapsecond.com> </div><div>Rubrik: Re: [time-nuts] Measurement of frequency of HP 8720D option
  1D5oscillator after switch on </div><div>
</div>On 5 Oct 2014 03:26, "Tom Van Baak" <tvb at leapsecond.com> wrote:

> Again, either one is fine for time nut use. One of these days I should do
a detailed performance comparison among a large set of both counters.
> /tvb

I was actually going to suggest that it would be really nice to see a
comparison of the various time interval counters.

If I am not mistaken,  one I looked at had options to allow its use to
15:GHz, which might be nice for me as I do a lot of microwave stuff. But I
suspect such options are expensive and I would be better buying a microwave
frequency counter and a lower frequently TI counter.

I have an old HP microwave counter, but

* It doesn't have the GPIB option or any other options for that matter.
* It has a fault
* It is nowhere near as sensitive as a modern unit

So I can't really be bothered to try to fix it.

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