Time-Out Timer; Weather Fax Monitoring - Yaesu FT-818ND 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 transmission short, thereby conserving
battery power.
To activate the Time-Out Timer:
1. Press and hold in the
2. Rotate the
3. The default setting for this feature is "off". Rotate the
setting (from 1 minute to 20 minutes).
4. When you have made your selection, press and hold in the
save the new setting and exit to normal operation.
Monitoring of HF Weather Fax broadcasts is easily accomplished using the FT-818.
1. Before proceeding, be certain that the Weather Fax demodulator is properly connected
to Pins 5 (DATA OUT 1200bps) and 2 (GND) of the rear panel DATA jack.
2. Set the transceiver to the VFO mode, and set the operating mode to "DIG," setting
Menu #26 to PSK31-U, as described previously.
3. Now, select the operating frequency of the station transmitting the Weather Fax broad-
cast. Note that, in the USB mode, the frequency you should program onto the display
is typically 1.90 kHz below the station's "assigned" frequency. Thus for a Weather Fax
station assigned to 8.682.0 MHz, tune to 8.680.1 MHz.
4. When the Weather Fax broadcast begins, no further operator intervention should be
needed from the transceiver standpoint. The audio level from the DATA jack on the rear
of the transceiver is fixed, and cannot be adjusted.
Fine adjustments in the gray-scale and the frame alignment are accomplished using the
computer and software connected to your Weather Fax demodulator.

Time-Out Timer

key for one second to enter the Menu mode.
knob to recall Menu #49 (TOT TIME).

Weather Fax Monitoring

Transmitter Operation
knob to set a new time-out
key for one second to
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