Software settings
Transceiver frequency correction
For temperature-dependent measurements, the correction factors are
recalculated when the transceiver temperature changes by 1˚C. That may lead to an
abrupt change in frequency of the received signal in the range of 2 Hz at a receiving
frequency of 10 MHz. For some applications, such jumps are not allowed, but is not
noticeable by ear in SSB and CW and does not affect the results of decoding for the
majority of digital amateur radio signals.
By a fan attached to the ACC connector the transceiver frequency can be
stabilized and jumps in frequency can be avoided. After setting the threshold
temperature and the fan speed in the External Control window, the transceiver
temperature will be stabilized at a predetermined value, and changes in frequency
of the reference oscillator over time will be negligible.
Due to the aging of the reference oscillator it is recommended to repeat the
frequency correction once every 4 months during the first year of operation, and
then approximately 2 times a year.
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