[Lowfer] Sampling Rate and Frequency Calibration

[pbunn]

John

Does the internal clock in the PIC cause the output square waves to change with changes in the internal clock? I ask this because I would want to use my GPS station clock in this circuit and I am sure that the internal PIC clock is nowhere near as stable as the GPS clock.

Pat
N4LTA



-----Original Message-----
From: lowfer-bounces at mailman.qth.net [mailto:lowfer-bounces at mailman.qth.net] On Behalf Of w1tag at charter.net
Sent: Tuesday, January 21, 2014 8:52 AM
To: lowfer at mailman.qth.net
Subject: [Lowfer] Sampling Rate and Frequency Calibration

In response to the recurring question about how to calibrate sound card sampling rates and check receiver audio output frequency "on the cheap," 
I have put up an article on a simple calibrator circuit that provides 1 kHz and 100 kHz outputs. See:
http://www.w1tag.com/Calibrator/Freq_Cal.htm

As the article notes, I can provide small quantities of  programmed divider chips. Anyone interested should contact me directly, not through the mail list.

John, W1TAG
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