Hi,
Regarding external Transverters, the functions XVn RF and XVn OFS have to be
used.
The XVn RF can only be set to a full MHz, and the XVn OFS can be set to
±9.99 kHz.
If You have a transverter with a not so good crystal, that will not
oscillate stable enough on the intended frequency, You have to use these two
functions. For 10.368 GHz the crystal multification will be 96 and for
24.048 GHz the factor is 192. To have a crystal that is below the ± 9.99 kHz
up on these bands, you have to pay a fortune for this, if you find a
manufacturer that can deliver these with that tight specification...and that
Your Heater / Oven is working OK.
(Just 4 info, a 100 MHz crystal is normally of a 5th overtone cut, which
means an actual multiplication factor of 96 x 5= 480, and 192 x 5= 960. A
1ppm crystal can be off by 23.9 kHz at 24GHz. At 47GHz this will be 47
kHz.).
Normally a crystal has an accuracy of some 0.005%, which is 50ppm.
For 10,368 MHz this will be 518 kHz !
Suppose the offset is +55 kHz.
How to set up the KX3 to include this figure, so the frequency readout is
the actual frequency You want to operate upon ?
This will not work, unless:
XVn RF can be set to steps in 0.1 MHz and XVn OFS can be set to ± 50.0 kHz.
or
XVn RF in 0.2 MHz steps and XVn OFS ± 99.9 kHz.
This will give You the chance of letting the frequency display be within
100Hz of the actual output, regardless of the wanted offset.
Is there room for a F/W modification ?
Rgds Bjoern
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