User manual

Reset to factory default settings and erasing all memories

A general reset to factory default settings may become necessary when the unit shows abnormal

functions or behaviour. If any malfunction should occur, try first to reset the radio, before returning it to

Your distributor for repair.

To perform a general reset

• Switch he radio off and on again while T-Call/Shift key is kept pressed

• The radio starts with factory default setting in a 20 kHz spacing system

• During reset all personal settings (memories etc) are erased

Note: The reset is not possible in modes 3, 6 and 7, because the user shall not have any access to the

settings. If a reset in one of these modes should become necessary, open the radio, take out all jumpers

and perform the reset. If the radio should now work again, repeat the customer settings (e.g. memory

storings) and add the jumpers again.

Technical informations

Saving and backup of user settings

This radio does no more need a lithium battery or any other backup medium with limited lifetime. It uses

EEPROM backup technology. During each switch off procedure the CPU will load all present settings

into the EEPROM and recall these information during the next power on process. The EEPROM backup

does not need any electrical power for data backup and lasts for many thousands of backup procedures.

Please take care that You switch the radio power at first or only via the radio’s ON / OFF volume knob

and not by simple disconnecting of the external power supply (like ignition switch, power supply mains

switch).

Connecting points for accessory items

Mikrophone wiring:

8 polig, jap. type mic socket. The microphone contains DTMF and other keys and a microcontroller for

data transmission betwen microphone and radio. Please operate the radio only with the original

microphone supplied with the radio, because some function can only be reached with the original

keyboard. The audio input is connected via PIN 1, in series with a PTT key- wired as normally used in

hand held radios which have a common wiring for MIC and PTT. If used for packet radio modems,

the modem audio output should be isolated from DC via coupling capacitor in series, while the modem

PTT can be connected via series resistor 2.2 kOhms to the same PIN 1. Ground is connected to PIN 8.

Please do not use any other PIN of the mic socket for audio purposes.

Ext. Speaker socket

An external speaker should have 4-8 Ohms impedance and minimum 2-4 Watts. The socket is a 3.5

mm mono type. Inserting an extension speaker will automatically switch off the internal speaker.

Note to packet radio modem connection

The mic socket does not provide any audio output signal suitable for modem decoders, because the

radio is only intended for normal speech transmission. However, connecting an up to 1200 bit/sec

Packet Radio data modem will require an audio output signal from the receiver, which can be taken from

the ext. Speaker socket only. Modulation input is available at PIN 1 of the mic socket as described in the

MIC socket clause. We cannot recommend to connect modems with higher transmission data rate.