EFJohnson 761X, 764X service manual Press the TONE key and “TON--x”is displayed

OPERATION

3.5.5 CALL GUARD TONE SELECT

If the transceiver has a TONE key, the Call Guard (CTCSS) tone can be selected. This allows calls to be placed to different mobiles or groups of mobiles and received on different groups than is normal for the channel. Proceed as follows:

1.Press the TONE key and “TON--x” is displayed.

2.Press the channel up/down ( ) keys to select the desired tone (“TON--1” to “TON--9”).

3.Press the TONE key again to exit this mode. Calls are then placed on the current channel and other channels using the new code until it is changed.

4.To reselect the standard Call Guard squelch tone programmed for the channel, select “TON--M” using the same procedure.

3.5.6 CHANNEL SELECT

Refer to Section 3.3.5.

3.5.7 DTMF NUMBER SELECT

If the transceiver has a DTMF key, up to seven preprogrammed telephone numbers can be transmit- ted. Proceed as follows:

1.Press the DTMF key and the currently selected number is indicated as “DTMF x”.

2.Press the channel up/down keys ( ) to select a different number.

3.To transmit the selected number on the current channel, press and hold the DTMF key.

NOTE: The DTMF 6 number is used for emergency calls and the DTMF 7 number is used for automatic logging. Therefore, if these features are used, the number may not be available for regular calls.

3.5.8 EMERGENCY KEY

Press and hold the EMER key to transmit an emergency call. To cancel this call before it is trans- mitted, press and hold this key again. Once emergency

transmission begins, the call cannot be canceled. Pro- gramming determines the channel on which the call is transmitted and also if it is transmitted once or repeat- edly until a control code is received.

3.5.9 LOCK KEY
Press and hold the		key to lock all pro-
	LOCK
grammable keys except				and		.
	CALL		MONI		EMER

Either “LK ON” or “LK OF” is displayed to indicate the current condition. If a locked key is pressed, all that happens is “LOCK” is displayed.

3.5.10 MONITOR MODE SELECT

Refer to Section 3.4.4.

3.5.11 OUTPUT POWER SELECT

The HIGH LOW1 and LOW2 keys can be used to temporarily or permanently override the pro- grammed power output for the channel. The program- ming of the “RF Power Selection” parameter in Table 4-2determines operation. Pressing the key once selects the level on the key and pressing it again selects the programmed level.

3.5.12 PRIORITY CHANNEL SELECT

Pressing PRI A selects the priority A channel and pressing PRI B selects the priority B channel. The PRI A key can also be programmed so that press-

ing and holding the key makes the current channel the priority A channel. Refer to Section 3.6.3 for more information.

3.5.13 RECEIVE ATTENUATE

Pressing the ATT key turns receive signal

attenuation on and off. Either “AT ON” or “AT OF” is displayed to indicate the current mode. The attenuator can be turned on if nearby strong RF signals such as commercial radio stations or pager transmitters are causing distortion of the receive signal.

3.5.14 SCAN SELECT

Pressing the SCAN key turns the channel scan feature on and off. Refer to Section 3.6 for more information.

November 1998
Part No. 001-7600-001	3-6