RadioShack Pro 90 TrunkTracker Scanner Owners Manual

31
To switch between normal and HyperSearch speeds,
during a limit search, press 
SPEED/PRI. SRCH flashes dur-
ing hypersearch.
Note: 
You can use HyperSearch only in the 5 kHz step
bands (29–54 MHz and 137–174 MHz).
BATTERY SAVE
To save battery power when a channel is manually se-
lected, the scanner’s battery save function automatically
sets the scanner to a standby mode if the scanner does
not receive any signals for more than 1 minute. During
the standby mode, the scanner repeatedly turns off the...

32
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 44 for more information).
• Your scanner...

33
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 avail-
able police radios would then be assigned to one of the
police subfleets, letting the police centralize their com-
munications and control the type of users on a single
system. Determining the exact...

34
SETTING SQUELCH FOR THE 
TRUNK TRACKING MODE
Your scanner’s squelch setting is automatically adjusted
in the trunking mode, which means it is not necessary to
manually adjust squelch while tracking trunked transmis-
sions. However, the squelch setting can affect how fast
your scanner acquires the data channel, and, in some in-
stances, can prevent your scanner from acquiring the
data channel at all.
We recommend you set 
SQUELCH to this position before
selecting a trunked bank.
Note:
 You can change...

35
1. Hold down TRUNK until the scanner beeps twice.
BANK, TRUNK, and the bank numbers flash.
2. Select the bank you want to store the trunked sys-
tem’s frequencies in by pressing a number key. The
scanner automatically selects the first channel in the
bank when you select the bank.
3. Use the number keys to enter the trunked system’s
frequencies, then press 
E.
Note:
 If you entered an invalid frequency in Step 3,
the scanner beeps, the channel number flashes and
Error appears. If this happens, press •...

36
5. Repeat Steps 3 and 4 until all frequencies have
been entered.
6. Press 
SRCH to begin searching
for the trunk’s data channel (the
channel that controls the trunk).
SRCH flashes as the scanner
searches for the data channel.
While 
the scanner looks through
the frequencies, you see them
on the display. When the scan-
ner finds the data channel, it
begins trunk tracking.
SCANNING A TRUNKED BANK
You can scan one trunked bank at a time. Once you
have stored frequencies for a trunked system in one or...

37
Note: To review the bank currently in use, press
DATA while in the trunk tracking mode. The bar for
the selected bank flashes at the top of the display
for about 5 seconds.
3. To return to non-trunked scanning, press 
TRUNK
again.
Hint: While scanning, you will not know exactly who the
IDs are assigned to until you listen awhile or until you lo-
cate ID lists in frequency guides or on internet sites such
as 
www.trunkscanner.com. Within a few minutes, you
can usually figure out if what you are...

38
Locking Out IDs
As with conventional scanning, it is possible to lock out
unwanted traffic. This is particularly important in trunked
systems because signals you cannot listen to (such as
water meters, door alarms, traffic signals, and encrypted
signals) are assigned IDs just like other users. You can
have up to 100 IDs locked out at one time.
Note: 
If you lock out an ID while searching, it is also
locked out of the scan list(s). See “Scan Lists” on
Page 41.
To lock out an ID, press 
L/ O when the ID...

39
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...

40
CHANNEL ACTIVITY INDICATORS
Your scanner has 20 channel activity indicators (bars)
which show the activity taking place on a trunked sys-
tem. You can see how many frequencies are being used
and generally monitor how much communication traffic
is occurring.
Each frequency you store in a trunking bank has a corre-
sponding activity indicator. However, since there are
only 20 indicators, but you can store up to 30 frequen-
cies, some indicators might indicate more than one fre-
quency if the trunked...