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.
Programming Motorola Trunking Frequencies in the
UHF-Lo Band
ADDENDUM FOR OPTIONAL
ENHANCEMENT VERSION
This addendum describes the changed operations of your scanner.
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).
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.
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-
Locking Out Data Channels
ola).
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.
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.
Receiving Motorola Trunking Systems in the
UHF-Lo Band
6. Program the trunking frequencies (see “Programming Trunking
Frequencies” on Page 58).
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:
Setting Squelch for Trunk Scanning
• Checking the trunking system’s control channel. You must pro-
gram the system’s base frequency and offset frequency to do
this.
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.
• 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.
Using an Optional PC Interface Kit
Notes:
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).
• 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-
books.
Using the Supplied Clone Cable
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.
• The scanner automatically decodes subaudible data it receives
in the VHF band.
Pausing on a Frequency
• 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.
To pause on a frequency, press FUNC then TUNE when the scanner
stops on the frequency, or turn SQUELCH counterclockwise.
RadioShack
A Division of Tandy Corporation
Fort Worth, Texas 76102
20-522
05A00
Printed in Japan
© 2000 Tandy Corporation.
All Rights Reserved.
RadioShack and RadioShack.com are trademarks used by Tandy Corporation.
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