RadioShack Pro 91 Handheld Trunking Scanner Owners Manual

31
3. Press MON/CLEAR and enter the number of the
monitor memory that contains the frequency you
want to store.
4. Press 
E. The scanner stores the frequency into the
selected channel.
SCANNING THE STORED 
CHANNELS
To begin scanning channels, press SCAN. The scanner
scans through all non-locked channels in the activated
banks. (See “Locking Out Channels” on Page 34 and
“Turning Channel-Storage Banks On and Off” on
Page 33). When the scanner finds a transmission, it
stops on it. When the transmission...

32
Or, if your scanner is scanning and stops at the desired
channel, press 
MAN one time. (Pressing MAN addition-
al times causes your scanner to step through the chan-
nels.) 
To resume automatic scanning, press 
SCAN. 

33
SPECIAL FEATURES
DELAY
Many agencies use a two-way radio system that might
have a period of 2 or more seconds between a query
and a reply. To keep from missing a reply on a specific
channel, you can program a 2-second delay into any
channel or frequency. The scanner continues to moni-
tor the channel frequency for 2 seconds after the trans-
mission stops before resuming scanning or searching.
To program a 2-second delay:
 If the scanner is
scanning and stops
on an active channel
where you want to...

34
The scanner scans all the channels within the dis-
played banks that are not locked out (see “Locking Out
Channels”).
Notes:
 You can manually select any channel within a
bank, even if that bank is turned off.
 You cannot turn off all banks. One bank must
always be active.
LOCKING OUT CHANNELS
You can increase the scanning speed by locking out
channels that have a continuous transmission, such as
a weather channel. To lock out  a  channel, manually
select the channel, then press 
L-OUT.L/O appears....

35
1. Press PROG.
2. Enter the channel number you want to select as
the priority channel, then press 
PRIORITY.
appears to the right of the channel number.
3. Repeat Steps 1 and 2 for the channel in each bank
you want to program as a priority channel.
To review all priority channels, press 
PROG, then re-
peatedly press 
PRIORITY to see the numbers of the pri-
ority channels.
To turn on the priority feature, press 
PRIORITY during
scanning. 
PRI appears. Every 2 seconds the scanner
checks the priority...

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....

37
TURNING THE KEY TONE OFF/ON
To turn off the key tone, follow these steps.
1. Turn off the scanner.
2. While holding down 
L-OUT/S/S, turn on the scan-
ner. 
OFF bEEP appears.
To turn the key tone back on, repeat these steps. 
on
bEEP
 appears.
TURNING THE BATTERY SAVE 
FUNCTION OFF/ON
To save battery power when a channel is manually se-
lected or while you program the scanner, the scanner
automatically sets itself to a standby (battery save)
mode if no button is pressed for more than 5 seconds
and no...

38
SKIPPING DATA SIGNALS
You can set the scanner so it skips nonmodulated or
data signals (such as fax or modem transmissions)
during a search or scan.
Note:
 Since data signals are not generally found in the
air band, this feature does not work in the air band.
To turn on the data skip feature, be sure the priority
feature is turned off (see “Priority” on Page 34), then
press  .    appears. To turn off the feature,
press   again.   disappears.
DATADATADATADATA 

39
TRUNK TRACKING
Your scanner is designed to track transmissions on Mo-
torola Type I, Type II, and hybrid analog trunking sys-
tems, which are extensively used in 800 MHz
communications. Remember these important points
when tracking transmissions:
 Your scanner monitors Type II systems by default.
However, you can change this if the system in your
area is different (see “Types of Trunking Systems”
below and “Scanning Type I and Hybrid Trunked
Systems” on Page 50 for more information).
 Your scanner...

40
The fleets might be the police department, the fire de-
partment, utilities, and city administration. The police
might decide to further divide its fleet into subfleets
such as dispatch, tactical operations, detectives, north,
south, east and west side patrols, and supervisors. All
the available police radios would then be assigned to
one of the police subfleets, letting the police centralize
their communications and control the type of users on
a single system. Determining the exact fleet-subfleet...