Slower than expected scan speed on BCD436HP/BCD536HP?

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Jan 15, 2006
Gulf Coast
For those folks who are experiencing slower scan speeds than what they believe they should be, or that the scanner is skipping traffic on a certain site, I thought you might find the following information on how these radios scan, from Mark's Scanners Easier to read BCD436HP/BCD536HP manual, helpful.

Scanning is performed with a mixture of FLQK order and SQK order. The scanner will not scan all Systems in one Favorites List and then move to the next List.
For each Favorites List, starting with 0, the scanner will scan each 0 SQK in FLQK order and then move to the next set of SQK's for each list. All Department and Site QK's are scanned with each System.

FLQK 0, SQK 0, DQK 0-99; FLQK 1, SQK 0, DQK 0-99….
FLQK 98, SQK 99, DQK 0-99; FLQK 99, SQK, 99, DQK 0-99.
Systems, Departments, and Sites with the same QK are scanned in order of creation.
Conventional Channels in Departments are also scanned in order of creation.

The Database is scanned next, in order of creation. Then, Systems with no QK (including created Quick Save Systems) are scanned in order of creation.

Next, the ‘Search with Scan’ System, containing any Custom Searches or the Close Call Hits Department, is scanned in order (if Unavoided, Hits with Scan last). ‘Close Call Hits’ is a special department that automatically stores the frequencies found by Close Call. If the ‘Close Call Hits’ department has no frequencies, the scanner will not scan the system.

The scanner scans a system for the duration you set using the System Hold Time option. For trunked systems, the scanner moves to the next system after the hold time expires, the current transmission ends, and the channel delay expires. Conventional systems operate similarly, but all (Unavoided) channels are scanned at least one time regardless of the hold time setting.
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