Figure 7.3: Rotator Setup - Mitsubishi SRRM25ZE User Manual

Gpredict User Manual
FT-817, 857 and 897 radios. These radios do not allow the frequency
to be set via CAT while they are in TX mode. When using this mode,
the transmitter frequency will be adjusted while the radio is in RX
mode by toggling the VFO. This way the transmitter frequency will
stay close to the ideal, Doppler corrected frequency.
FT817/857/897 (manual): This is similar to the previous mode except
●
that automatic update of the TX frequency is not performed. Instead,
the user can use the SPACEBAR key for PTT. When the SPACEBAR
key is pressed, the controller will update the TX frequency and then
enable PTT. Pressing the SPACEBAR again will disable PTT.
PTT Status:
If you select any other option than None, Gpredict will read the status of
the PTT and act accordingly, meaning that RX tuning will only be done if
PTT is OFF and TX tuning will only be done while PTT is ON. It is a very
important option if you want to use the same radio for both RX and TX
regardless of whether the radio type is RX only, TX only, or Simplex TRX.
If your radio support reading the PTT status via CAT select the Read PTT
option. For FT817/857/897 you should select this option.
If you have a radio that could be used as Simplex TRX but it does not
support reading PTT status via CAT, you might be able to use the Read
DCD option. This requires that your radio outputs some signal that
indicates the PTT status (most transceivers do that) and that you use a
special CAT interface that can route this signal to either CTS or DSR and
configure rigctld to use these signals for DCD:
rigctl –model=334 ... -d /dev/ttyUSB0 --dcd-type=CTS
The PTT Status option has no effect for full duplex radios.
VFO Up/Down
If you are using Gpredict to control a full-duplex capable radio, such as the
IC-910H or FT-847, you need to tell Gpredict which VFO to use for up and
downlink. This setting is different from radio to radio and you should
consult the operation manual of your radio for the correct setting. Also note
that you will have to set your radio into full-duplex mode before letting
Gpredict control it.
This setting is only used for full-duplex radios and has no effect if the radio
is receiver, transmitter or simplex transceiver.
LO Down and Up:
These options allow you specify an offset/local
oscillator frequency if you use a transverter
with your radio. For example, if you are using
a downlink transverter with your HF receiver
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Figure 7.3: Rotator setup.