Specifications

2.
Choose a clear RX frequency and copy this frequency into the RX box of the interface,
click >VFO to set your transceiver and the interface (*)
3.
Fill in the TX box with the CONSTANT of the transponder but ADD the sign of the constant
either + or – to the value in MHz (I.E -285 or +285):
4.
Press the TRSP. (Transponder) button: TRX-Manager calculates the working frequencies
of the satellite. The Satellite’s working frequencies are then calculated by TRX-Manager,
locked on and displayed by the interface. Your TX is set by TRX-Manager to the ground
station’s TX frequency (by applying the Doppler effect) and you can listen to your signal…
(*) You may also tune your rig and click VFO>
Operating in transponder mode
Once the proper shift and Doppler compensation have been applied using one the above
procedures, you may note the TX and RX frequencies displayed by the interface are
constantly corrected. This is normal while the Doppler compensation is not engaged…
Before any QSY, you have first to engage the Trace mode. Now, each change of the RX
frequency involves the same change of the TX frequency. And as soon as you engage the
Doppler compensation (DOP), working frequencies of the satellite become stable and
TRX-Manager tracks the satellite by the defined Step (Hz).
While working the satellite, you can still do a manual QSY using the tuning dial of your
transceiver. TRX-Manager recalculates the working frequencies of the transponder in real-time
and tracking resumes from the current frequencies.
Listening “on the fly”
Tracking a satellite “ on the fly”, i.e. without knowing its working frequencies amounts to
using linear transponder satellite by:
1.
Adjusting the receive frequency on your transceiver or receiver
2.
Pressing the TRSP. button to capture the satellite’s working frequencies
3.
Engaging the Doppler compensation by pressing DOP.
Additional information
Functions that are not fully described above are the following one:
SAT (Satellite mode): for compatible transceivers,
TRX: activates a second transceiver for transmit
ANT: activates rotator control
VFO>: to copy (or retrieve) the current frequencies of the transceiver into the interface
>VFO: to copy (or set) the transceiver’s frequencies and modes from the interface ; also
sets the rotator to the current direction of the satellite
M.IN: to copy the current settings into a channel ; the channel’s number and label are
defined from the bottom of the window
TX and RX buttons: to compensate TX or RX, TX and RX
RX TX in the same band while TRACE ON: this is possible provided you set your
transceiver in Split mode (the FT-847 does not support this use).
Using the memory channels
Twenty memory channels provides setting for satellite ; please set the configuration and
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