Radio Shack HANDHELD TRUNKING 20-521 - Manual (Page 36)

36
USING THE KEYLOCK
Once you program your scanner, you can protect it
from accidental program changes by turning on the
keylock feature. When locked, the only controls that
operate are
SCAN , MAN , KEYLOCK , VOLUME/OFF , and
SQUELCH .
Note: The keylock does not prevent the scanner from
scanning channels.
To turn on the keylock, hold down KEYLOCK until K/L
appears. To turn it off, hold down KEYLOCK until K/L
disappears.
USING THE DISPLAY BACKLIGHT
You can turn on the display light for easy viewing at
night. Press
to turn on the display light for 15 sec-
onds. To turn off the light before 15 seconds elapse,
press the button again.
CHANGING SEARCH SPEEDS
The PRO-91 has two search speeds.
To switch between the normal and Hypersearch
speeds during limit search or direct search, press
H/S .
HYPER appears during Hypersearch.
Note: You can use Hypersearch only in the 5 kHz step
bands (29–54 MHz and 137–174 MHz).
Normal Search Hypersearch
100 steps/second 300 steps/second