EFJohnson 7780 service manual Option Switch Functions, Function Conv, See

TRANSCEIVER OPERATION

2.3.6 LOW BATTERY INDICATION

When the battery voltage falls below a preset

level, the icon appears in the display. This icon stays on until power is turned off. In addition, the following low battery indications may be programmed to occur:

•The amber BATT indicator on the top panel lights.

•A beep sounds once per minute in the standby mode.

•A beep sounds each time the PTT switch is pressed.

The battery should be recharged as soon as prac- tical after a low battery indication appears. Refer to Section 5 for more battery information. There is also a battery saver function that can be enabled by program- ming. This function uses the RSSI level to determine when the site is very near and then automatically switches to the low transmit power output level.

2.3.7 CHANNEL AND ZONE SELECTION

Channel Select

To change the current channel, rotate the 16-posi- tion channel selector knob on the top panel to the desired position. With SMARTNET/SmartZone chan- nels, the channel is always indicated by alias (name). With conventional channels, the channel number or frequency may also be displayed (see Section 2.4.2).

Zone Select

A zone is a group of up to any 16 conventional and SMARTNET/SmartZone channels defined by programming (see Section 1.2.4). Up to 16 zones can be programmed for a total of 16 x 16 or 256 channels. One use of zones may be to select groups of channels programmed for operation in different geographical areas or radio systems. Zones are selected as follows:

1.Press the Zone option switch and the alias (name) of the current zone is flashed in the display.

2.Use the number keys to enter the desired zone number or scroll through the available zones using

the and keys.

3.Once the desired zone is displayed, press the ENT key or wait 4 seconds.

Table 2-1 Option Switch Functions

Function	Conv.	Smart-	Smart-	See
	Mode	Net	Zone	Section
		Mode	Mode
Backlight	X	X	X	2.3.3
Call Alert		X	X	2.5.7
Call Response		X	X	2.5.4, 2.5.5
Displayed Information	X			2.4.2
Emergency		X	X	2.5.10
High/Low Power	X			2.4.10
Home Zone	X	X	X	2.3.8
Keypad Lock	X	X	X	2.3.5
Keypad Programming	X			2.7
Message		X	X	2.5.8
Monitor	X			2.4.4
Normal/Selective	X			2.4.6
Phone		X	X	2.5.6
Priority	X			2.4.12
Private Call		X	X	2.5.4, 2.5.5
Radio Wide Scan	X	X	X	2.3.11
Repeater Talk-Around	X			2.4.9
Scan	X	X	X	2.3.11
Scan Edit	X			2.4.11
Site Lock			X	2.5.14
Site Search			X	2.5.14
Status		X	X	2.5.9
Tones On-Off	X	X	X	2.3.10
Zone	X	X	X	2.3.7

2.3.8 HOME ZONE

The radio can be programmed with a home zone. Then when power is turned on, the radio can be programmed so that either the home or last selected zone is automatically selected.

If the Home Zone option switch is programmed, it can be used to quickly select or change the home zone. To select the home zone, momentarily press this switch. Then to change the home zone to the currently selected zone, press and hold this switch until a tone sounds (approximately 1 second).

2.3.9 TIME-OUT TIMER

The time-out timer disables the transmitter if it is keyed for longer than the programmed time. On each

	November 1999
2-5	Part No. 001-7780-500