[time-nuts] Distributiuon Amlifier Altinex DA1804NT

[Vlad]

I did couple of other measurements, using MV89A as a ref source  for 
5386A

DATUM OCXO is DUT:
http://www.patoka.ca/OCXO/OCXO-MV89Aref-DATUM-AD.png
http://www.patoka.ca/OCXO/OCXO-MV89Aref-DATUM-TM.png
http://www.patoka.ca/OCXO/OCXO-MV89Aref-DATUM-FD.png
Drift(Hz/sec): -2.20E-7

Trimble TB is DUT:
http://www.patoka.ca/OCXO/OCXO-MV89Aref-TB-AD.png
http://www.patoka.ca/OCXO/OCXO-MV89Aref-TB-TM.png
http://www.patoka.ca/OCXO/OCXO-MV89Aref-TB-FD.png
Drift(Hz/sec): -5.17E-8

Looking to the drift values, the case with T-Bolt has better value, I 
think. But it has bigger spikes.



On 2015-05-29 18:59, Bob Camp wrote:
> Hi
> 
> I think that looks about as good as your counter can do. The slope down 
> at
> the start is the resolution of the counter. The slope up on the right
> is the actual stability of
> the oscillator.
> 
> Bob
> 
>> On May 29, 2015, at 9:52 AM, Vlad <time at patoka.org> wrote:
>> 
>> 
>> 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.
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-- 
WBW,

V.P.