Mike wrote:
Kyle,
1. First, be sure that you are, in fact, supplying the FS keying information
to the 920 before suspecting the rig. If you have an ohm meter, put it
across the leads that you are connecting to the FSK jack on the 920.
Depending on
what your sending, the meter should either show a short on keying or show
SOME fluctuation. If you are not getting any indication that the FSK contacts
are being shorted for the duration of the mark tone, then you will have to
correct that problem -- which would be from the output of your computer
or your
Terminal Unit.
2. If you are getting an indication with a meter that the contacts are being
supplied with a short when needed, then you need to be sure that you are, in
fact, able to FSK the 920. Make a contact on phone. Tell the other operator
that you will be sending a carrier and that when you touch a couple of wires
together, the carrier frequency should shift slightly. For this test,
it would
be best to set the 920's FSK to USB. However, the other guy should be able
to tune around and hear your carrier and detect a shift in it when you touch
the wires together. Then, go back to SSB and listen to what he tells you.
If you are unable to shift the frequency in this way, that would indicate
that you still do not have the 920 set up correctly, or, it isn't
working right.
3. If you don't have a small VOM with you, get one at Radio Shack and put
it in your travel kit. If you had one with you, you would be able to easily
solve this problem.
If your FSK interface inverts the polarity, you will also need to set
the transceiver menu to "reverse" keying.
--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek
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