Low Freq. | Hi Freq. | Step | Description | |
(MHz) | (MHz) | (kHz) | ||
| ||||
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| |
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| |
452.1875 | 452.9625 | 25 | Taxi/Busses | |
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| |
470.0000 | 512.0000 | 12.5 | ||
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| |
150.7750 | 150.9650 | 5 | Tow Trucks | |
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|
Note: The steps shown above are default values. You can select any desired step setting.
UNDERSTANDING YOUR
PRO-92’S MODES
You can program each channel with any of seven receive modes. Each mode affects how your scanner operates when scanning and receiving transmissions, and also af- fects what transmissions you receive when you set the scanner to the Closed mode (see “Open and Closed Modes” on Page 63). The following sections describe each mode and how they affect your scanners operation. See “Changing the Receive Mode” on Page 53.
PL, DPL and trunking systems all use some form of cod- ed squelch. Coded squelch techniques involve the trans- mission of a special “code” signal along with the audio of a radio transmission. A receiver with coded squelch only activates when the received signal has the correct “code.” This lets many users share a single frequency, and de- creases interference caused by distant transmitters on the same channel.
In all major metropolitan areas of the United States, every available radio channel is assigned to more than one us- er. Public safety radio systems on the same frequency are usually set up at a distance of forty miles apart, or more. This means that you may hear transmissions from a distant system when your local system is not transmit- ting. By entering the PL for a local system, and operating the bank in closed mode, the scanner will not stop on transmissions from the distant system.
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