RadioShack Pro 91 Handheld Trunking Scanner Owners Manual

21
 (trunking channel activity bars) — each represents a
received trunking frequency or a data frequency while
trunk tracking (see “Channel Activity Bars” on Page 47).
-1- — appears when the weather service band is se-
lected.
-2- — appears when the amateur radio service band
is selected.
-3- — appears when the marine service band is se-
lected.
-4- — appears when the air service band is selected.
-5- — appears when the police service band is select-
ed.
— appears when a priority channel is selected....

22
MON— appears during search modes or when you
select a monitor memory. The number to the right of
this indicator shows the current monitor memory num-
ber.
MAN — appears when you press MAN.
PGM — appears while you store a frequency into a
channel, while you enter a frequency range during a
limit search, or when you program trunking frequen-
cies, fleet maps, or ID memories while trunk tracking.
HYPER— appears while Hyperscan or Hypersearch
is active during a direct or limit search.
t and s — appears...

23
Monitor Memories
The scanner also has 5 temporary memory locations
called monitor memories. You can use these monitor
memories to temporarily store frequencies while you
decide whether to store them into a channel. This is
handy for quickly storing an active frequency when you
search through an entire band (see “Searching For and
Temporarily Storing Active Frequencies” on Page 26).
While you are searching frequencies, the 5 numbers at
the top of the display indicate the 5 monitor memories.
MON appears...

24
OPERATION 
TURNING ON THE SCANNER
AND SETTING SQUELCH
Note:
 Make sure the scanner’s antenna is connected
before you turn it on.
1. Turn 
SQUELCH fully counterclockwise.
2. Turn 
VOLUME/OFF clockwise until it clicks and you
hear a hissing sound.
3. Press 
MAN (manual) to stop the scanner from
scanning, turn 
SQUELCH clockwise, then leave it
set to a point just after the hissing sound stops. 

25
STORING KNOWN FREQUENCIES 
INTO CHANNELS
Good references for active frequencies are Ra-
dioShacks “Beyond Police Call,” “Aeronautical Fre-
quency Directory,” and “Maritime Frequency Directory.”
We update these directories every year, so be sure to
get a current copy.
Follow these steps to store frequencies into channels.
1. Press 
MAN, enter the channel number where you
want to store a frequency, then press 
PROG. The
channel number appears. 
2. Use the number keys and 
 to enter the frequency...

26
 Your scanner automatically rounds the entered
frequency to the nearest valid frequency. For
example, if you enter a frequency of 151.473,
your scanner accepts it as 151.475.
 Press 
DELAY if you want the scanner to pause 2
seconds after a transmission ends before it pro-
ceeds to the next channel (see “Delay” on
Page 33). The scanner also stores this setting
in the channel.
4. If you want to program the next channel in
sequence, press 
PROG and repeat Steps 2 and 3. 
SEARCHING FOR AND 
TEMPORARILY...

27
2. Enter the frequency that is the lower limit of the
range you want to search (including the decimal
point), then press 
E.
3. Press
 LIMIT.Hi and 956.000 MHz appear.
4. Enter the frequency that is the upper limit of the
range you want to search (including the decimal
point), then press 
Eagain.
5. Press t to search from the upper to the lower limit,
or s to search from the lower to the upper limit.
6. When the scanner stops
on a transmission,
quickly press either:

HOLD to stop search-
ing so you...

28
Notes:
 If you want to start the search from a frequency
already stored in one of your scanner’s chan-
nels, press 
MAN or PROG, use the number keys
to enter the channel number, then press 
MAN or
PROG again.
 If you enter an invalid frequency, the scanner
displays 
Error. Simply repeat this step.
3. Press t to search downward or s to search upward
from the selected frequency. 
-d-,SEARCH, and t
or s appear.
4. When the scanner stops on a transmission,
quickly press either:

HOLD to stop searching...

29
When the scanner stops on a transmission, quickly
press either:

HOLD to stop searching so you can listen to the
transmission. 
HOLD appears.

MON/CLEAR to store the displayed frequency into
the current monitor memory.
To release hold and continue searching, press
HOLD or hold down t or s for at least 1 second. Or,
if you did not press 
HOLD, simply press t or s to
continue searching. 
Note: 
Because there are many different frequencies al-
located to fire and police departments, it takes several...

30
Notes:
 If you marked all frequencies to be skipped within
the search range, the scanner beeps 3 times and
does not search.
 If you program more than 20 frequencies to skip,
each new frequency replaces one you already
stored, starting from the first frequency you stored.
 Press t or s to select a skipped frequency while
HOLD appears. L/O appears when you select a
skipped frequency.
LISTENING TO THE MONITOR 
MEMORIES
You can listen to the fre-
quency you stored in any
one of the five monitor...