E F Johnson Company 2425331 Benutzerhandbuch

47

radio was set up, not to any programming that a user 
can perform. If a feature is controlled by a front panel 
option switch and that switch is not available, it is 
probably not available. 

An exception is Keypad Programming which can 

allow the user to reprogram several conventional 
channel parameters. Refer to Section 5.16 on page 33 
for more information.

For best results, hold the microphone about 1-2 

inches from your mouth and speak at a normal conver-
sational level. Do not shout since it distorts your voice 
and does not increase range. Make sure that the PTT 
(push-to-talk) switch is pressed before you begin to 
speak and released as soon as the message is complete.

When approaching the limits of radio range, the 

other party may not be able to hear your transmissions 
and there may be an increase in background noise 
when messages are received. You may still be out of 
range even though you can hear a message. The reason 
for this is that the signal you are receiving is usually 
transmitted at a higher power level than the one trans-
mitted by your radio. Communication may be 
improved by moving to higher ground or away from 
shielding objects such as tall buildings or hills.

In the standby mode (power on, not transmitting), 

radio power consumption is relatively low. Therefore, 
you can probably leave the radio on for one or two 
days without operating the vehicle and the battery 
should not become seriously discharged. However, if 
the outdoor temperature is low enough to significantly 
decrease battery capacity, the radio should be turned 
off when not in use. 

Since power consumption is significantly higher 

when transmitting, it is good practice to have the 

vehicle running while transmitting. This ensures that 
optimum power is being delivered to the radio and that 
the battery does not become discharged. 

A government license is usually required to 

operate this radio on the air. 

If “UNPROGRAMD” is displayed, the cause 

could be any of the following:

•

An unprogrammed channel is selected. Select a 
programmed channel.

•

The selected channel is programmed for an option 
that is not installed or an error in programming was 
detected. Contact your system operator for service.

If no characters or all characters appear in the 

display, the viewing angle may be improperly 
adjusted. Refer to Section 3.3 on page 13 for more 
information. 

If some other problem is occurring, turn power 

off and then on again to reset the control logic. Also 
make sure that the controls are properly set and that 
the power, external speaker, and accessory cables (if 
used) are securely plugged into the back of the 
radio. 

If the radio is completely inoperative, check the 

power cable fuse that is usually located near the 
vehicle battery. If it is blown, remedy the cause if 
possible and replace it with the same type (15A). If the 
radio still does not operate properly, return it to your 
system operator for service.