Radio Shack PRO-92 manual Monitoring/Identifying Talk Groups, Locking Out Data Channels

20-522AD.fm Page 1 Tuesday, May 9, 2000 1:13 PM

PRO-92 500-Channel Portable Trunking Scanner

ADDENDUM — Please read before using this equipment.

ADDENDUM FOR OPTIONAL

ENHANCEMENT VERSION

This addendum describes the changed operations of your scanner.

Monitoring/Identifying Talk Groups

For EDACS and Motorola (above 806 MHz range) trunking systems, the scanner monitors the control channel between each transmis- sion to identify talk groups. For some Motorola (under 512 MHz range) and LTR systems, the scanner uses the subaudible data sent with each transmission to identify talk groups.

Locking Out Data Channels

If you are scanning VHF and UHF trunking frequencies under the 512 MHz range using subaudible data and are not using a base fre- quency and offset, lock out all data channels. See “Locking Out Channels or Frequencies” on Page 48. Turn off the scanner to re- move the lockouts.

Receiving Motorola Trunking Systems in the UHF-Lo Band

You can program the scanner to receive transmissions in the UHF- Lo band (380–512 MHz) of the Motorola trunking system. You can receive these transmissions by:

•Checking the trunking system’s control channel. You must pro- gram the system’s base frequency and offset frequency to do this.

•Decoding the subaudible data transmitted with the signals. When you do this, the scanner might detect wrong IDs, but you can easily receive trunking frequencies without programming the base and offset frequencies.

Notes:

•Base and offset frequencies vary for each type of trunking sys- tem. You can get information about these frequencies for the trunking system you want to scan using www.trunkscan- ner.com, other Internet sources, or locally published guide-

Programming Motorola Trunking Frequencies in the UHF-Lo Band

1.Select the bank, then press PGM to enter the program mode.

2.Store the base frequency into channel 00 of the bank you selected, then store the trunking frequencies into subsequent channels in the same bank (see “Storing a Frequency While Searching for a Specified Channel” on Page 42).

Note: You must store frequencies using the subaudible trunking method in banks mode by mode.

3.Press TRUNK then repeatedly press MODE to select MO (Motor- ola).

4.Press FUNC then 9. 12.5 kHz (the default offset frequency) appears.

5.Repeatedly press FUNC then 9 to select the offset frequency you want (12.5 kHz, 25.0 kHz, or 50 kHz).

Note: Offset frequencies above 50 kHz do not appear and are used only for subaudible decoding mode.

6.Program the trunking frequencies (see “Programming Trunking Frequencies” on Page 58).

Setting Squelch for Trunk Scanning

Your scanner automatically mutes the audio during trunk scanning when it decodes control channel data. However, we recommend you turn SQUELCH clockwise and leave it set to a point just after the hiss- ing sound stops. This lets the scanner quickly acquire the data chan- nel.

Using an Optional PC Interface Kit

You can increase the number of preprogrammed frequency ranges your scanner can receive (up to 100) using an optional PC interface kit (available at your local RadioShack store).

Using the Supplied Clone Cable

books.

•The scanner automatically decodes subaudible data it receives in the VHF band.

•If you try to enter an offset frequency in the VHF and UHF-Hi bands (137 to 174 and 806 to 960 MHz), the scanner will ignore the entry.

RadioShack

A Division of Tandy Corporation

Fort Worth, Texas 76102

You can transfer the programmed data to and from another Ra- dioShack Cat. No. 20-522A or Cat. No. 20-196 scanner using the supplied clone cable.

Pausing on a Frequency

To pause on a frequency, press FUNC then TUNE when the scanner stops on the frequency, or turn SQUELCH counterclockwise.

20-522

05A00 Printed in Japan

© 2000 Tandy Corporation.

All Rights Reserved.

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