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time. It can be programmed for 15 seconds to 3 
minutes, 45 seconds or it can be disabled. 

If the transmitter is keyed for longer than the 

programmed time, the transmitter is disabled, a contin-
uous 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 chan-
nels, a penalty time may also be programmed that 
prevents transmissions for a certain time after the 
transmitter is disabled (see Section 5.6).

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.

If the Home Zone option switch or menu param-

eter is programmed, it selects the preprogrammed 
home zone. The selected channel is displayed if the 
channel switch is enabled, and the preprogrammed 
home channel is selected if it is disabled. 

Pressing and holding the Home Zone option 

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 is selected when power is turned on. Refer to 
Section 3.3 for more information.

Each conventional channel and SMARTNET/

SmartZone and P25 Trunked system can be 
programmed for high, low, or switchable power. If the 
High/Low Power option switch or menu parameter is 
programmed and selectable power is programmed on 
the current channel or system, high and low trans-
mitter power can be selected. All models support high 
and low power. The low power level is typically 1 watt 
and the high power level the rated power output of the 
radio (2.5 - 5 watts, depending on frequency band). 

The new level is flashed in the display as either 

“HI POWER” or “LOW POWER”. If selectable 
power is not permitted on the current channel, 
“FIXED LOW” or “FIXED HIGH” is flashed and no 
change occurs. The selected power level for a channel 
or system is permanent until it is manually changed 
again. The low power mode may be automatically 
selected during a low battery condition (see 
Section 3.4). 

The various alert tones that sound are described 

in Section 7.1. These tones can be turned on and off if 
the Alert Tone option switch or Tones menu parameter 
is programmed. When all tones are off, “TONE OFF” 
is momentarily displayed, and when all tones are on, 
“TONE ON” is momentarily displayed. If this switch 
or menu parameter is not programmed, tones are fixed

 

in the on or off mode by programming. If the Surveil-
lance mode is programmed (see following), tones are 
totally disabled.

The Alert Tone volume can be adjusted relative to 

the volume control setting. This is done by program-
ming and also by the user if the Tone Volume Adjust 
option button or menu parameter is programmed. 
Relative levels of –170 to +170 can be set with “0” the 
default setting. A minus value decreases the tone 
volume and a plus value increases it. The user adjusted 
level permanently overrides the programmed level if 
applicable.

The Surveillance mode totally disables the back-

light, all alert tones, and front panel LED indicator in 
all operating modes. The radio can be fixed in this 
mode by programming or it can be turned on and off 
by the user if the Surveillance Mode option button or 
menu parameter is programmed. The user selected 
mode permanently overrides the programmed mode if 
applicable. To provide a transmit indication when the 
front panel LED is disabled, the 

 icon is displayed 

(see Section 2.4). This icon is displayed only in the 
surveillance mode.