TCXO CALIBRATION PROCEDURES
METHOD
1
(with accurate frequency counter)
1.
Remove top cover of counter. Connect counter to reliable power source. Note ambient temperature.
2.
Measure the frequency of the TCXO (at the rear panel 10 MHz connector) with a second counter
of known calibration accuracy.
3.
Adjust the TCXO by turning the calibration screw on the TCXO case until the measured frequency
equals that shown on the TCXO calibration label.
METHOD
2
(with accurate frequency source)
1.
Apply a 10 000 000 Hz signal from a frequency standard (or other oscillator of suitable accuracy
and stability) to the Band 1 input of the counter.
RESOL
2.
Press (1 Hz resolution)
3.
Adjust the TCXO until the reading on the counter
is
offset from 10 000 000 Hz by the negative
of the frequency shown on the TCXO. For example, if the TCXO calibration label shows a frequency
of 10 000 003 Hz, adjust the TCXO until the counter displays
9 999 997
Hz.
DISPLAY INTENSITY
On the front panel logic assembly (A1 11) R4 may be adjusted to provide the most comfortable display
intensity.
Scans by ArtekMedia © 2007
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