[time-nuts] Distributiuon Amlifier Altinex DA1804NT

[Vlad]

Hello,

I've finished the test. Here is the links to charts:

http://www.patoka.ca/OCXO/OCXO-8663ref-MV89A-AD.png
http://www.patoka.ca/OCXO/OCXO-8663ref-MV89A-PD.png
http://www.patoka.ca/OCXO/OCXO-8663ref-MV89A.png

It looks different, but its not better, I think.

Regards,
Vlad

On 2015-05-28 23:21, Vlad wrote:
> Bob,
> 
> You are correct. I am using HP 5386A. And its only HP counter I have.
> I set Gate time equal to 10sec. May be this gate time is an issue ?
> The other settings is .1s, and 1s.
> Meantime, I did switch ref signal source from Trimble TB to
> Oscilloquarz 8663-SX OCXO and connected MV89A to counter input. 8
> hours later, I'll see what will be on chart.
> 
> Regards,
> Vlad
> 
> On 2015-05-28 21:50, Bob Camp wrote:
>> Hi
>> 
>> *IF* I’m understanding you correctly, you are measuring this data
>> with an HP 5386.
>> 
>> That’s only a 4 ns counter. I agree with Tom that there is something
>> weird in your setup, but that
>> still does not help the basic limit of the counter’s resolution. You
>> will need to be out around 1,000
>> seconds or more to get to the noise on the OCXO. At any time shorter
>> than that you are either
>> measuring the counter’s noise or noise in your setup.
>> 
>> If you have one, a 5335 would be a better counter to use than the 
>> 5386.
>> 
>> Bob
>> 
>>> On May 27, 2015, at 10:04 PM, Vlad <time at patoka.org> wrote:
>>> 
>>> 
>>> Hello,
>>> 
>>> Recently, I acquired video distribution amplifier (model Altinex 
>>> DA1804NT). It says it could handle 350Mhz. I am planing to use it to 
>>> split 10Mhz Ref signal from my OCXO. This OCXO I bought on auction 
>>> site. It has Oscilloquarz model 8663-SX plus some components which 
>>> give me 4 outputs - 2 sines and two squares. After few days of "warm 
>>> up" I did measurement of ADV from one of the sine outputs and then 
>>> measurement of the same sine signal from OCXO, but this time through 
>>> the Altinex DA. Each test took 8 hours. Attached is the results.
>>> 
>>> NOTE: on the ALTINEX* charts I forgot to change the label for OCXO. 
>>> So, its not DATUM. It is Oscilloquarz 8663-SX
>>> I was using Trimble TB as a ref signal  for HP 5386
>>> 
>>> Since I have no  instruments which measuring phase noise, I am 
>>> interesting, what will be the quick method to measure the phase noise 
>>> for that DA ?
>>> 
>>> 
>>> --
>>> WBW,
>>> 
>>> V.P.<ALTINEX-DA.png><ALTINEX-DA-F.png><ALTINEX-DA-T.png><OCXO2.png>_______________________________________________
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-- 
WBW,

V.P.