Radio Shack PRO-528 manual Beyond the Basics Skipping a trunked bank

Beyond the Basics

skipping a trunked bank

You can scan conventional frequencies programmed in the same bank by holding down S for about 1 second. If there is no conventional frequency, the scanner scans the next bank.

turning the status bit ignore (s-bit) on or off

You can set how your scanner works with status bits (also called S-Bits), letting you control how the scanner interprets and displays talk group IDs. The last four bits of a Motorola Type II talk group ID (a binary 16-bit code) are the status bits. In some systems, status bits identify special situations (such as an emergency status).

Your scanner is preset to assume that the status bits in a talk group ID are set to 0 and ignores them. For example, when the scanner receives the talk group ID 010111001110 0011, it reads the ID as 010111001110 0000 and converts the first 12 bits of the ID to 23776 (the talk group ID). However, since the status bit value is 3 (0011 converted to decimal equals 3), the ID is actually 23779.

If you are scanning a Motorola Type I system and do not have a fleet map for that system, you might have to turn off status bit ignore in order to determine the proper fleet map.

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