Section 3.5 fo, Section 3.5. p, Section 3.5.4) – EFJohnson 764X User Manual

Page 22: Section 3.5.2

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OPERATION

3-5

November 1998

Part No. 001-7600-001

•

Note if the busy indicator (

) on the front panel

is being displayed. If it is not, the channel is not busy
and a message can be transmitted.

•

Taking the microphone off-hook disables coded
squelch control if it is programmed for the monitor
function. Take the microphone off-hook and the

indication should be displayed. If no messag-

es are heard, the channel is not busy and a message
can be transmitted.

•

If the monitor (

) option switch is pro-

grammed, pressing it disables coded squelch control
similar to taking the microphone off-hook. If no
messages are then heard, the channel is not busy and
a message can be transmitted. Press the switch again
to disable monitoring.

•

If the Transmit Disable On Busy feature is pro-
grammed on the channel, the transmitter is automat-
ically disabled if the channel is busy. This is
indicated by the display flashing and a rapid beeping
when the PTT switch is pressed.

3.4.5 TIME-OUT TIMER

The time-out timer disables the transmitter if it is

keyed continuously for longer than the programmed
time. If the transmitter is disabled by this feature, the
transmit indicator (

) turns off and the display

flashes and a beeping tone is produced until the PTT
switch is released.

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 pos-
sible damage to the transceiver caused by transmitting
for an excessively long period.

There is also a penalty timer that may be pro-

grammed to prevent further transmissions for the pro-
grammed time after the transmitter is disabled.

3.5 PROGRAMMABLE FUNCTIONS

3.5.1 INTRODUCTION

The F1-F4 and

keys on the front panel

can be programmed for the functions shown in

Table 3-1. A sheet of labels is included with the trans-
ceiver, and the applicable label should be placed on the
key to indicate its function. Refer to the section listed
in the table for a description of the function.

3.5.2 BACKLIGHT ON-OFF

Refer to Section 3.3.9.

3.5.3 BANK SELECT

Refer to Section 3.3.7.

3.5.4 BEEP ON-OFF

Refer to Section 3.3.10.

MONI

Table 3-1 Option Key Programmable

Functions

Function

Key Label

Description