[Lowfer] Frequency Calibration

Wed, 6 Nov 2002 13:44:48 -0600

John: just looked at a capture of WWVB and it shows 800.5 hz centre
frequency with sidebands

-----Original Message-----
From: John Andrews [mailto:[email protected]] 
Sent: November 6, 2002 1:45 PM
To: [email protected]
Subject: Re: [Lowfer] Frequency Calibration

Vern,

> John : I was under the impression that it gave me 800 hz, but am not 
> sure. Also calibrated on CBK am 540 khz when I worked for the CBC we 
> had to keep the carrier within 2hz.

Not sure about Canada, but AM broadcast in the U.S. has to be within 20 Hz.
Most of the "big time" stations are closer than that.

>I was confused when YQ (305) showed up 5 hz high and
> YIV(300) showed up higher than that.

The tolerances are much looser for aero beacons. They aren't of much use.

> So what should WWWVB display in Argo/Spectran ??

It should show a central line with sidebands from the amplitude keying. The
frequency of the center line should be close to your BFO offset. What do you
see?

John Andrews

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