Microwave Time and Frequency Calibration

[Ruebenn]

Dear All,


I am having some problems In measurements relating to the TIME and frequency.
I have GPS freq Standard(910R) in my lab and i have a 5351B and also a HP53132A as working standards.
If i tie or lock all the time bases together, what would my uncertainty of my best measurment be?
Should i RSS the values of the 910R and the Systematic Uncertainty measurements as evident in the manuals of the HP5351B/53132A?
if yes, what are the paremeters that i should consider for the 910R?
Appreciate the help.

Rgds
Ruben

[Hershal]

Certainly if you have a GPS-sync'd frequency standard, you should tie the other units to it. Then your 910R will drive the stability and uncertainty of the time base. You may find that you uncertainty gets down to around the -11 or -12 level as a result.

Hope this helps.

[Ruebenn]

Dear Sir,

Thanks for the reply. But i would be obliged if you could elaborate with some facts and figures?
Or is there any leads or read outs over the internet about this?

Appreciate the help.

Rgds
Ruben

[Ruebenn]

Dear Sir,

Say if we connect the time bases of both the gps standard and a counter, how do we tabulate the uncertainty ?
The BMC so to speak and the possible uncertainty budgets?

Rgds
Ruben

[Hershal]

Generally, the GPS has a much lower MU than a counter, and so if the GPS time sync is used to drive the counter, then the MU is effectively the same as the GPS, with a little extra for the connection loss.

Hope this helps.

[Ruebenn]

Dear Sir,

Are there any books specifically touching time and frequency calibration/measurement (if possible, power sensor and meter measurements)topics currently available in the market?
Besides Agilent's website?
Appreciate the help.
Rgds
Ruben

[ScottBP]

A good resource for the subject of time and frequency calibration is www.leapsecond.com, they have a link at http://www.leapsecond.com/pages/books/ with some good resources.

[Mchurch]

Originally Posted by Ruebenn

Dear All,


I am having some problems In measurements relating to the TIME and frequency.
I have GPS freq Standard(910R) in my lab and i have a 5351B and also a HP53132A as working standards.
If i tie or lock all the time bases together, what would my uncertainty of my best measurment be?
Should i RSS the values of the 910R and the Systematic Uncertainty measurements as evident in the manuals of the HP5351B/53132A?
if yes, what are the paremeters that i should consider for the 910R?
Appreciate the help.

Rgds
Ruben

Type A data:
-For your bmc's is going to be pretty much a repeatability study since any tech you have in your lab can slap a bnc cable into the 53132's input.
Normal Distribution, Divisor of 1.0.

Type B data:
-Good link here for the 53132's and other agilent counters;
http://www.home.agilent.com/upload/c...ment_error.htm
-Uncertainty of the 910R,
-Uncertainty recieved on last calibration of these units,
-Enviromental, (I dont see much from this number, unless you have a storm outside)
All these will probably be a rectangular distribution with a divisor of 1.732.

-Resolution
Most likely set to 1/2 your minimum resolution with a divisor of 1.732 for rectangular, others will say full resolution with a divisor of SQRT (6) for a triangular distribution.

Add everything together, use the Student-T for distribution at 2 sigma and call it a day.

With the 910R you will most likely come out with something along the lines of -11 to -12.

Hope I helped,
Mark.