Radio Shack PRO-90 owner manual Using Trunk Tracking Scan Delay, Monitoring IDs

20-520.fm Page 39 Wednesday, August 4, 1999 3:06 PM

Using Trunk Tracking Scan Delay

Many trunked systems have a period of 2 or more sec- onds between a query and a reply. You can program a 5-second delay to hold on an ID for 5 seconds to wait for a reply. The scanner continues to monitor the frequency for 5 seconds after the transmission stops before resum- ing scanning.

Press DLY to turn trunk tracking scan delay on or off. DLY appears when trunk tracking scan delay is set.

Note: If you consistently miss responses even with trunk tracking scan delay set, you might need to change the default system type or the fleet map you are using. See “Scanning Type I and Hybrid Trunked Systems” on Page 44.

Monitoring IDs

You can use your scanner’s display to monitor the fre- quencies in a trunked system for activity. You cannot hear conversations in this mode, but this is an excellent way to determine which talk groups are the most active. To set the scanner to monitor IDs, hold down SRCH until the scanner beeps twice. SRCH flashes, and all active talk group IDs appear in succession. To stop monitoring IDs, press SRCH again.

Note: When you monitor IDs, locked-out IDs also ap- pear.

39