PY3CRX PY2PLL wrote:
[snip]
This 11.024XXX divided by 2 is the "corrected clock value" that JVComm32
needs to print a straight vertical line when in HF-FAX mode , 60 lines per
minute. It's not some measured reference value.
[snip]
Hello Marcus,
ok, understood.
= Argo measured 802,25 Hz - don't remember the decimal portion
= Freq Counter measured 798.8 <> 801.6 - alternating
= Spectran 127 , 8KHz sampling rate, needed -6.7Hz offset to show 800.0 Hz
When using Spectran, change the sampling frequency within the Spectran Controls
panel
to 11025. 8000 Hz is a value that many sound cards do not implement correctly
Question: the modulating tones used by WWV HF signal are accurate? How much?
The carrier certainly is quite accurate, but I cannot quote any figure.
Perhaps you could find some info at their Web site :
http://www.bldrdoc.gov/timefreq/stations/wwvb.htm
73
Marcus
73 Alberto I2PHD
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