[time-nuts] Frequency comparison

[Raj]

Bob,

You are right, I am using an analog multi-meter where its easy to observe the 
needle movement.

At 08-02-10, you wrote:
>Hi
>
>If you mix the RB and GPS down with a mixer you eventually will run into a
>problem. 
>
>As you set them both very close to frequency, the output is a noisy DC
>signal rather than a sine wave. Since each source can drift either up or
>down for a short period of time, it can be hard to tell what's going on with
>a zero crossing detector. It is much better to capture the output voltage
>with a strip chart or the digital equivalent. 
>
>Bob 

-- 
Raj, VU2ZAP
Bangalore, India.