E.F. Johnson Company 5300 ES Series, Operating Manual

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4-4 5300 ES Series Mobile Radio Operating Manual March 2008
Radio Wide Features
4.3 Time-Out Timer
The time-out timer disables the transmitter if it is keyed for longer than the programmed
time. It can be programmed on each channel for times of 15 seconds to 3 minutes, 45
seconds or it can be disabled.
If the transmitter is keyed continuously for longer than the programmed time, the
transmitter is disabled, a continuous tone sounds, and “TX TIMEOUT” is displayed. Five
seconds before time-out occurs, a warning beep sounds to indicate that time-out is
approaching. The timer and tone are reset by releasing the PTT switch.
A different time can be programmed for each system, and the timer can be enabled or
disabled on each conventional channel. With conventional channels, a penalty time can
also be programmed that prevents further transmissions for a certain time after the
transmitter is disabled (see Section 5.5).
One use of this feature is to prevent a channel from being kept busy for an extended period
by an accidentally keyed transmitter. It can also prevent possible transmitter damage
caused by transmitting for an excessively long period.
4.4 Home Zone-Channel Select
If the HOME zone option switch is programmed, pressing it selects the preprogrammed
home zone and channel. This provides a quick way of returning to a frequently used zone
and channel. Pressing and holding this switch until a tone sounds makes the currently
selected zone the new Home zone. The radio is also programmed so that either the home
or last selected zone/channel is automatically selected when power is turned on (see
Section 3.1). A secondary Home Zone, Home2, may also be programmed.
4.5 Power Output Select
Each conventional channel and SMARTNET/SmartZone and P25 Trunked system can be
programmed for High, Low, or Switchable transmit power. If Switchable power is
programmed on the channel or system, the Tx PWR option switch can then be used to
select high or low transmitter power. All models support switchable power.