Time-Out Timer; Split Frequency Operation - Yaesu FT-857D Operating Manual

Most often used on FM, the transmitter's Time-Out Timer (TOT) feature disables the trans-
mitter after a user-defined period of transmission. This feature may be useful in preventing
a "stuck microphone" (accidental closure of the PTT switch) from causing interference to
other users, and it will also force you to keep your transmissions short, thereby conserving
battery power.
To activate the Time-Out Timer:
1. Press and hold in the [ FUNC ] key for one second to enter the Menu mode.
2. Rotate the SELECT knob to recall Menu Mode No-084 [ TOT TIME ] .
3. The default setting for this feature is "OFF." Rotate the DIAL knob to set a new time-out
setting (from 1 minute to 20 minutes).
4. When you have made your selection, press and hold in the [ FUNC ] key for one second
to save the new setting and exit to normal operation.
This transceiver provides convenient split-frequency operation, using VFO-A and VFO-B,
for DX working and other operating situations requiring unique split frequency pairs.
The example below will describe a typical split-frequency DX situation on the 20-meter
band, with a DX station transmitting on 14.025 MHz, listening 10 kHz higher in the band.
1. Set VFO-A to 14.035.00 MHz CW (DX station's listening frequency).
2. Press the [ FUNC ] key momentarily, then rotate the SELECT knob, as needed, until
Multi Function Row "a" [A/B, A=B, SPL] appears on the display.
3. Press the [ B ]( A=B ) key momentarily (to set VFOs A and B to 14.035.00 MHz).
4. Press the [ A ]( A/B ) key momentarily to select VFO-B, then tune the VFO-B frequency to
14.025.00 MHz (DX station's transmitting frequency).
5. Press the [ C ]( SPL ) key momentarily. The transceiver will now transmit using the VFO-
A frequency, and will receive using the VFO-B frequency.
The "u" icon will appear at the left side of the "SPL" indication, and the "SPL" icon will
appear at the upper left corner of the display.
6. To listen to the pile-up calling the DX station (so as to align your frequency more closely
to that of the station being worked by the DX), press the [ A ]( A/B ) key to reverse the
VFOs. You will now be tuning in the vicinity of 14.035 MHz, and you can zero in on the
DX station's listening frequency by tuning in on the station in QSO with the DX. Press
the [ A ]( A/B ) key again to return to reception on the DX station's frequency.
7. Press the [ C ]( SPL ) key once more to cancel split operation; the "u" icon and "SPL"
icon will disappear from the display.
FT-857 Operating Manual
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