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Optimizing P25 Performance
You can optimize the scanner’s performance with digital APCO 25 systems. Follow
these steps for each system where you can hear APCO 25 traffic.
Notes:
These steps work only when you can clearly receive the system. If you are in a
weak-signal area or receive interference, these steps will not work. These steps do
not compensate for weak signals or signals subject to interference.
If you set an incorrect decode threshold level in Step 5, the scanner might stop
decoding all digital signals in the system. If this happens, change the setting to a
value between 8 and 12 then repeat these steps.
Conventional System
[MENU] Program System
Select the system
Edit Sys Option
Adjust P25 Level
Trunked System
[MENU] Program System
Select the system
Edit Site
Select the site
Adjust P25 Level
Make sure the system’s P25 Level option is set to Auto.
Press [HOLD/RESUME] on an active digital channel on the system. HOLD appears
on the display.
Press then [VOL]. disappears and APCO threshold Adjust Mode
appears at the bottom of the display.
Func
This number shows the current threshold setting.
Threshold voltage levels.
*In Manual mode or Auto mode, if you rotate the
knob clockwise, the threshold level is adjusted
wider than default level. If you rotate the knob
counterclockwise, the level is adjusted narrower.
UB335ZH.book Page 52 Friday, March 17, 2006 4:35 PM