Extract from NIST Time and Frequency Services publication 432 (2002)
The WWV transmitters consist of two types: plate modulated class C
transmitters operating at 10 kW each on 5, 10 and 15 MHz, and class A
transmitters operating at 2.5 kW each on 2.5 and 20 MHz.
Regards,
Mike VP8NO
On 27/11/2014 16:22, Phil Kane wrote:
On 11/26/2014 10:11 PM, Jim Brown wrote:
On Wed,11/26/2014 4:54 PM, Fred Jensen wrote:
The second and third harmonics of the tones, maybe the fourth harmonic
depending on conditions and strength of the signal at your QTH
Another thing that should have been mentioned as appearing in the
baseband are the "ticks".
How far down were the harmonics? -40 is 1% distortion, -50 is 0.32%. 5%
is widely considered to be "communications quality."
When I've listened to WWV (not often), I hear distortion. They're a
Standard for Frequency and Time, not high futility. :)
How much of that is due to selective fading (twist) of the sidebands?
It's HF, you know! :)
73 de K2ASP - Phil Kane
Elecraft K2/100 s/n 5402
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