E.F. Johnson Company 761X Service Manual Download

Page: 21 / 99

OPERATION

3-4

November 1998
Part No. 001-7600-001

3.3.7 BANK SELECT

Two banks of up to 16 channels each can be pro-

grammed. Only the channels in the current bank are
then selectable. This would allow, for example, groups
of channels to be programmed for operation in differ-
ent cities.

The

key is pressed to switch between

banks, and the current bank is indicated briefly in the
display as “BANK 1” or “BANK 2”. If bank select is
not used, a single block of up to 32 channels can be
programmed.

3.3.8 AUTOMATIC SCAN ENABLE

The transceiver can be programmed so that scan-

ning is automatically enabled whenever power is
turned on or the microphone is placed on-hook. Refer
to the scan description in Section 3.6 for more
information.

3.3.9 BACKLIGHT ON-OFF

The following backlight modes can be selected

by the

option switch or by pressing F3 in the

power-on menu described in Section 3.3.4.

LI ON - On continuously
LI OF - Always off
LI AT - Controlled by the voltage applied to pin 1
of the DB9 connector on the optional accessory
cable (see “Light” in Table 4-2).

3.3.10 BEEP ON-OFF

The key beep which sounds when keys are

pressed can be enabled and disabled by pressing the

option switch or pressing F2 in the power-on

menu described in Section 3.3.4. Either “BP ON” or
“BP OF” is displayed to indicate the current mode.

3.4 RECEIVING AND PLACING CALLS

3.4.1 INTRODUCTION

The two calls which can be placed and received

are mobile-to-mobile and telephone calls. With tele-
phone calls, the telephone number can be dialed using

a microphone with a telephone keypad, or up to seven
telephone numbers also may be preprogrammed and
then selected by pressing the

key (see descrip-

tion in Section 3.5.7).

3.4.2 RECEIVING A CALL

1. Turn transceiver power on and set the volume level

as described starting in Section 3.3.1.

2. Select or scan the channel or channels on which you

want to receive the call. Refer to Section 3.6 for
more information on scanning.

3. When the message is received, take the microphone

off-hook and respond. Press the microphone push-
to-talk (PTT) switch to talk and release it to listen.

4. When the conversation is finished, place the micro-

phone back on-hook. The microphone hanger may
control features such as scanning and monitoring
that are described later.

3.4.3 PLACING A CALL

1. Turn transceiver power on and set the volume level

as described starting with Section 3.3.1.

2. Select the channel on which the call will be made as

described in Section 3.4.

3. Regulations require that the channel be monitored

before transmitting to make sure that it is not being
used by anyone else. If you were to transmit while
someone was talking, you would probably disrupt
their conversation. Refer to “Monitoring Before
Transmitting” description which follows for more
information.

4. If the channel is not busy, press the microphone PTT

switch to talk and release it to listen.

5. When the conversation is finished, place the micro-

phone back on-hook.

3.4.4 MONITORING BEFORE TRANSMITTING

Use one of the following methods to monitor the

channel before transmitting a message:

BANK

LITE

BEEP

DTMF