TRANSCEIVER OPERATION

SECTION 2 TRANSCEIVER OPERATION

2.1 FEATURES

2.1.1 GENERAL FEATURES

16 zones with home zone select

16 channels per zone (256 channels total)

Radio-wide scan

Time-out timer

LCD 8-character alphanumeric display with 12 status annunciators

2.1.2 CONVENTIONAL FEATURES

Channel scan with three user programmable scan lists

Priority channel sampling

Busy channel lockout (transmit disable on busy)

Monitor mode

Call Guard® (CTCSS/DCS) squelch control

Penalty timer

Conversation timer

Repeater talk-around

DTMF/ANI signaling

User selectable power output

Selectable channel display mode

2.1.3 SMARTNET™ II FEATURES

Group, Enhanced Private Conversation™, Private Conversation II™, and telephone calls

Call Alert™ (paging)

Emergency calls

Messaging

Priority monitor scanning

Failsoft operation

Dynamic regrouping

2.1.4 SMARTZONE® FEATURES

Site trunking

Site search

Site lock/unlock

2.1.5LIMITED/ENHANCED KEYPAD FEATURES

Limited (3-key) and Enhanced (15-key) models of this transceiver are available. Most features avail-

able with the enhanced keypad model are also avail- able with the limited keypad model. The features not available with the limited (3-key) model are as follows:

Since the DTMF keys are not available, it is not possible to dial telephone numbers or manually send DTMF tones. However, telephone calls can still be placed using prestored numbers.

With conventional standard scanning, only one scan list is available and it is not user programmable.

With SMARTNET/SmartZone operation, direct entry of unit ID numbers is not available when making private calls or sending pages. However, these calls can still be made by recalling the ID from a prestored list.

2.2 CONTROLS AND DISPLAY

Antenna Jack

 

 

 

On-Off/Volume

 

Channel Select Sw

 

 

16

 

1

 

 

15

 

2

 

 

14

 

3

 

 

13

 

4

 

 

12

 

5

 

 

11

 

6

 

 

10

9 8

7

OFF/VOL

 

TX

RX

BATT

 

Transmitter

Receive Signal

Low

Keyed

Detected

Battery

2.2.1 TOP PANEL CONTROLS

On-Off Volume - Turning this knob clockwise turns power on and sets the volume level. Turning it coun- terclockwise to the detent turns power off.

Channel Select Switch - Selects up to 16 prepro- grammed channels. The selected channel is also indi- cated in the display.

Antenna Jack - Connection point for the antenna.

 

November 1999

2-1

Part No. 001-7780-500

Page 15
Image 15
EFJohnson 7780 service manual Transceiver Operation, Features, Controls and Display