Motorola GR300 service manual Section Operation

Section 3

Operation

Overview

Theis section describes the basic operation of the ZR310 Community Repeater Panel. Included is a list of all TPL and DPL tone codes with their decoded user numbers. Refer to the programming section of this manual to customize your community repeater.

Basic Operation

Installing the ZR310 in the GR300 Repeater Station converts the GR300 Repeater Station into a multi -user community repeater. The ZR310, via a microprocessor, performs data management to simultaneously decode and encode TPL and DPL tones.

TPL Tones and DPL Codes

The ZR310 monitors the channel for TPL Tones and/or DPL codes. When it detects a tone or code, it implements conversion to a user number (Table 6-2). Next, it points to the area in the database that contains information about that particular user. The DPL decode numbers in the table are user programmable.

User Validation

The ZR310 is always monitoring the receive audio for the presence for a valid user. You can enable or disable any of the 50 TPL tones, and any combination of the 20 DPL codes. For information on how to enable or disable a user, refer to the programming section of this manual.

Enabled Users

When the ZR310 detects an enabled TPL tone or DPL code, it will check to see if the user is enabled or disabled. A disabled user is ignored and is not repeated.

Co-Channel Protection

For each user, you can select co-channel protection on/off. If the ZR310 detects an enabled TPL/DPL user when co-channel protection is transmitting, it will check to see if a carrier is present on the repeater transmit channel. If the transmit channel is busy (possibly due to paging or other activity not present on the repeater receive channel), the ZR310 will "protect the channel" and wait for it to clear before keying the transmit radio. The co-channel protection feature determines whether or not the ZR310 has priority on the channel.

March, 1993 6880902Z68-O Section 3-1