Calibration Of Electronic Equipment In The Home Workshop
Bud-- wrote:
Ken Smith wrote:
In article m,
Too_Many_Tools wrote:
I have a well stocked test bench at home containing a range of analog,
digital and RF test equipment as I am sure most of you also do.
Well the question I have is how do you handle the calibration of your
equipment? What do you use for calibration standards for resistance,
voltage, current and frequency?
For frequency, you can use WWV. You need:
A short wave radio with an audio output.
Perhaps an audio filter tuned to about 1KHz.
A generator you wish to calibrate near the WWV frequency.
A frequency counter that is not too far off.
Procedu
Tune in WWV.
Put wire on generator and set it to WWV-1KHz
Listen for tone and move stuff around until it sounds good.
Feed tone into the filter.
Place the counter on the output of the filter.
The number on the counter is X Hz away from 1KHz when the generator is
XHz off from WWV-1KHz.
I believe the color subcarrier in a color TV is phase locked to the
transmitted signal and, for network studio transmissions, is derived
from a cesium clock. From what I have read it is more accurate than WWV
and doesn't require extra equipment other than a TV displaying an image
with a studio source. Frequency is 3.579545 MHz.
--
bud--
Check.
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