[time-nuts] frequency comparator reading question

[Alan Melia]

These units multiply the frequency delta and the phase change quoted is 
probably 10^n times the actual difference. The output is f + n*delta(f)

I have but do not use a Montronix 100-7 (before the Fluke purchase)
Alan
G3NYK
----- Original Message ----- 
From: "Bill Hawkins" <bill at iaxs.net>
To: "'Discussion of precise time and frequency measurement'" 
<time-nuts at febo.com>
Sent: Thursday, February 27, 2014 5:55 PM
Subject: Re: [time-nuts] frequency comparator reading question


> The question can't be answered without knowing what the range switch
> does.
> In my experience, the cycle that is divided into 360 degrees is the
> period
> of the input signal regardless of the range switch.
>
> You don't say, but the usual GPSDO produces a 10 MHz signal, unless it's
> for a telco application. If the phase meter goes through one cycle in a
> second
> there is a one cps difference between the signals. One cycle at 10 MHz
> is
> one part in 10E7. One cycle in a kilohertz is 1 part in 1000. 1 cycle in
>
> 100 seconds for 10 MHz is one part in 10E9
>
> Does the time for a phase rotation vary with the range switch?
>
> Bill Hawkins
>
> -----Original Message-----
> From: Bob Camp
> Sent: Wednesday, February 26, 2014 9:16 PM
>
> Not having one here, about all I can guess is that there are 360 degrees
> in a cycle. If it's going through 360 degrees in 10 seconds it's 0.1 Hz
> off at what ever point it's comparing.  If it takes 100 seconds that's
> 0.01 Hz.
>
> Yes I get this pesky decimal point stuff wrong from time to time ...
>
> Bob
>
> On Feb 26, 2014, at 9:19 PM, Paul A. Cianciolo <paulc at snet.net> wrote:
>
>> I have a Fluke montronics frequency comparator.
>> It has 2 inputs, one from my GPS and one from my DUT.
>> After a given oscillator is warmed up, I can read the meter in parts
>> 10 -X
>> There are 2 meters, One for phase 0 to 360 degrees, and one for part
>> to the -nth
>> In the 10-9th position on the selector switch the a given oscillator
>> will show a 0 to 360 degrees travel lets say in 1 second.
>
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