Hello Adriano,
You didn't say whether you were using FSK D or AFSK A, or what software
you were using. I will assume that when you say "on the scope" you mean
on the waterfall in software such as MMTTY.
If your radio is in FSK D, then it can receive on any frequency within
the filter bandpass, but it can only transmit on one frequency - the one
corresponding to the PITCH setting. If you click on a signal in the
waterfall to receive it, the frequency you choose in the software's
waterfall will probably not be the same as the one the radio will
transmit on. If you use the K3's MONitor function to listen to your
transmitted signal, you can hear whether the transmitted and received
frequencies are the same.
Depending on the software you are using and its capabilities, there are
advanced methods to use mouse-tuning and AFC in FSK RTTY, but the
simplest solution to this problem is never to use clicking in the
waterfall to find a signal when you are using FSK. If you are CQing, you
can use AFC to let your receiving software tune in callers who come back
slightly off-frequency, but when you are planning to call someone else
who is CQing you should turn AFC off. In MMTTY, you can use the HAM
button to ensure that your receive frequency will be the same as your
transmit frequency. You should configure the HAM default to be the same
as the radio's PITCH setting.
If your radio is in AFSK A, it can transmit on the same frequency it
receives on, although the best frequency for both transmitting and
receiving is the one in the PITCH setting and the HAM button. If you are
using MMTTY software the easiest way to ensure that your transmit and
receive frequencies are the same is to turn NET on. With NET on you can
safely use mouse-clicking to tune in a signal to work. However, if you
are calling CQ you should turn NET off, and use the HAM button before
your first transmission to establish your transmit frequency. If the
other station comes back off-frequency you can use AFC or a mouse-click
to copy the other station's signal, but as soon as the QSO is completed
you should click on the HAM button to return to your original transmit
frequency.
73,
Rich VE3KI
PY2ADR wrote:
> Trying to config k3 on digi modes but i noted a "offset" between rx and tx ...
> When i find a sig on the scope i click on it and the rx is ok. Then i go tx and the \
> station comes back in another qrg. Or when i call cq the stations comes back in \
> another qrg....
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