FT-25R/FT-25E Advance Manual
8
VFO Split Mode
When working on repeaters with odd splits, or communicating with astronauts on orbiting
space vehicles, it may be necessary to use nonstandard splits between the receive and
transmit frequencies. If the application is infrequent enough not to warrant the dedication
of a memory channel for this purpose, the “VFO Split” mode may be used. Here is the
procedure for going Split:
1. Press and hold the
F
key to enter the Set Mode.
2.
Press the [▲] or [▼] key to select Set Mode Item “
34 VFO.SPL
”.
3. Press the
F
key to enable adjustment of this Item.
4.
Press the [▲] or [▼] key to select “
VSP
.
ON
”.
5. Press the
PTT
switch to save the new setting and
return to normal operation.
6. Press the [
#VFO
] key twice, as needed, to select VFO-A.
7. Set VFO-A for the desired receiving (downlink) frequency (e.g.145.800 MHz).
8. Press the [
#VFO
] key to set VFO-B for desired transmit (uplink) frequency (e.g.
144.475 MHz).
9. Press the [
#VFO
] key to re-establish VFO-A as the
“Main” (receive) VFO.
The transceiver will now be operating in the Split mode.
10. When the
PTT
switch is pressed to transmit, VFO-A and VFO-B will reverse positions.
To modify the VFO-B (transmit) frequency (for Doppler Shift correction, etc.), just
press the [
#VFO
] key, make the necessary change, and then press the [
#VFO
] key
once more to restore VFO-A to the “receive VFO” position.
