Automatic Power-Off (Apo) Feature; Transmitter Time-Out Timer (Tot) - Yaesu FT-1500M Operating Manual

3. Press and hold in the [MHz] key for one second to save the new setting and exit to normal
operation.
RF Squelch
A special "RF Squelch" feature is provided on this radio. This feature allows you to set the squelch so
that only signals exceeding a certain S-meter level will open the squelch.
To set up the RF squelch circuit for operation, use the following procedure:
1. Press and hold in the [MHz] key for one second, then rotate the Main Dial knob to select
"RFSQL."
2. Press the [MHz] key momentarily, then rotate the Main Dial knob to select the desired signal
strength level for the squelch threshold (OFF, or S-1 to S-10).
3. Press and hold in the [MHz] key for one second to save the new setting and exit to normal
operation.
Note: The receiver' s squelch will open based on the highest level set by the two squelch systems
(Noise Squelch and RF Squelch). For example:
1. If the Noise Squelch (Menu #29) is set so that signals at a level of S-3 will open the squelch, but
the RF Squelch (Menu #23) is set to "S-9," the squelch will only open on signals which are S-9
or stronger on the S-meter.
2. If the RF Squelch is set to "S-3," but the Noise Squelch is set to a high level which will only
pass signals which are Full Scale on the S-meter, the squelch will only open on signals which are
Full Scale on the S-meter. In this case, the Noise Squelch overrides the action of the RF Squelch.

Automatic Power-Off (APO) Feature

The "Automatic Power-Off" (APO) feature will turn the radio completely off after a user-defined
period of PTT or key/button inactivity. If you do not press any front panel keys or buttons, rotate the
Main Dial knob, use the microphone' s keys and buttons, or transmit, and so long as the transceiver is
not scanning or engaged in priority monitoring, the radio will shut itself off after the specified time
period. This feature is useful in minimizing battery drain in a mobile installation if you forget to turn
the transceiver off when you leave your vehicle.
To activate the APO feature as follows:
1. Press and hold in the [MHz] key for one second, then rotate the Main Dial knob to select "APO."
2. Press the [MHz] key, then rotate the Main Dial knob to select the desired "switch-off" time
(between 1 and 12 hours, or OFF).
3. Press and hold in the [MHz] key for one second to save the new setting and exit to normal
operation.

Transmitter Time-Out Timer (TOT)

The "Time-Out Timer" (TOT) feature is designed to force the transceiver into the "receive" mode
after a preset time period of continuous transmission (the default is 6 minutes). This feature prevents
your transceiver from transmitting a "dead carrier" for a long period of time in the event that the
microphone PTT switch is accidentally locked in the "TX" condition.
The Time-Out Timer' s "switch-to-receive" time may be adjusted, in one minute increments, for any
period between 1 and 60 minutes.
To change the default (6 minute) time setting as follows:
1. Press and hold in the [MHz] key for one second, then rotate the Main Dial knob to select "TOT."
2. Press the [MHz] key, then rotate the Main Dial knob to select the desired time interval (between 1
and 60 minutes, or OFF).
3. Press and hold in the [MHz] key for one second to save the new setting and exit to normal
operation.
Programmable Microphone Keys (P1/P2/P3/P4)
Default FT-1500M key functions have been assigned (at the factory) to the microphone' s [P1], [P2],
[P3], and [P4] buttons. These may be changed by the user, if you wish to define another function for a
particular key or keys.