PRO-90 300-Channel Trunk Tracker Scanner
(200-0520)                 General Information        Faxback Doc. # 45394

Understanding Your Scanner

Once you understand a few simple terms we use in this manual and familiarize
yourself with your scanner's features, you can put the scanner to work for
you.  You simply find the communications you want to receive, then set the
scanner to scan them.

A frequency is the tuning location of a station (expressed in kHz or MHz).
To find active frequencies, you can use the search function.

You can also search the service-search banks, which are preset groups of
frequencies categorized by type of service.

When you find a frequency, you can store it into a programmable memory
location called a channel, which is grouped with your other channels in a
channel-storage bank.  You can then scan the channel-storage banks to see
if there is activity on the frequencies stored there. Each time the scanner
finds an active frequency, it stays on that channel until the transmission
ends.

A Look At The Keypad

Your scanner's keys might seem confusing at first, but this information
should help you understand each key's function.

SCAN - scans through the stored channels.

MANUAL - stops scanning and lets you directly enter a channel number or
         frequency.

TRUNK - switches between conventional and trunk tracking modes.

SVC (service) - selects a service bank.

SPEED/PRI (speed/priority) - turns on and off the Hypersearch mode; sets
                             and turns on and off the priority feature.

LOCK/(symbol) - locks the Keypad to prevent accidental program changes.
                Also turns on the display light for 15 seconds.

Number Keys - each key has a single-digit label and a range of numbers.
              The single-digits are used to enter a channel, frequency, or
              ID number. The range of numbers (31-60, for example) indicates
              the channels that make up a memory bank.

(period) - enters a decimal point or clears an incorrect entry.

E (enter) - enters frequencies into channels.

\/ /LIMIT - set the search direction and holds the frequencies search; sets
            the frequency range.

DLY (delay) - programs a 2-second delay for the selected channel, a limit
              search, or each service scan.  Also programs a 5-second delay
              in the trunk tracking mode.

SRCH - searches a specified frequency range to find frequencies; searches
       for another active ID in the trunk tracking mode.

L/O (lock out) - lets you lock out selected channels or frequencies; lets
                 you lock out a selected ID in the trunk tracking mode.

/\ /HOLD - sets the search direction and holds the frequency search; holds
           on the current ID in the trunk tracking mode.

DATA - turns on or off the data signal skip feature or checks the current
       trunking bank in the trunk tracking mode.

A Look At The Display

The display has indicators that show the scanner's current operating status.
A good look at the display will help you understand how your scanner oper-
ates.

BANK - appears with numbers (1-10).  Numbers with a bar under them show
       which channel-storage banks are turned on for scanning.

TRUNK - appears when the scanner is in the trunk tracking mode.

- (channel activity  - each represents a received trunking freq uency or a
         indicators)   data frequency in the trunk tracking mode (see
                       "Channel Activity Indi cators" on Faxback Doc.
                       # 45397).

P - appears when a priority channel is selected.

BATT - blinks when the scanner's battery is low.

DATA - appears when the data skip function is active.

POLICE - appears when you search the police service bank.

FIRE/EMG - appears when you search the fire/emergency service bank.

AIR - appears when you search the air service bank.

MRN - appears when you search the marine service bank.

WX - appears when you search the weather service bank.

SCAN - appears when you scan channels.

SRCH - lights steadily during a limit search and ID search, and blinks
       while HyperSearch is active and when you monitor IDs (see "Monitoring
       IDs" on Faxback Doc. # 45397).

PRI - appears when the priority feature is turned on.

HOLD - appears when you manually select a channel or when the scanner is
       in the hold mode during a search or service bank scan or during a
       limit search.

DLY - appears when you program a delay.

L/O - appears when you manually select a channel or frequency you locked
      out.

(Key symbol) - appears when you lock the keypad.

Error - appears when you make a entry error.

Understanding Banks

Channel Storage Banks

To make it easier to identify and select the channels you want to listen
to, channels are divided into 10 banks of 30 channels each.  Use each
channel-storage bank to group frequencies, such as the police department,
fire department, ambulance services, or aircraft (see "Guide to the Action
Bands" on Faxback Doc. # 45400). For example, the police department might
use four frequencies, one for each side of town.  You could program the
police frequencies starting with Channel 1 (the first channel in bank 1)
and program the fire department frequencies starting with Channel 31 (the
first channel in bank 2).

Service Banks

The scanner is preprogrammed with the frequencies allocated by police,
fire/emergency, aircraft, marine and weather services.  This is handy for
quickly finding active frequencies instead of searching through an entire
band (see "Scanning Service Banks" on Faxback Doc. # 45395).

Understanding Trunking

In the past, groups that broadcast frequently, such as police departments,
were restricted to transmitting on just a few frequencies. This resulted in
heavy traffic and often required 2-way radio users to wait for a specific
frequency to clear before transmitting.

Trunked systems allow more groups of 2-way radio users to use fewer freq-
uencies. Instead of selecting a specific frequency to transmit on, a trunked
system chooses one of several frequencies when the 2-way radio user presses
PTT (push to talk).  The system automatically transmits the call on that
frequency, and sends a code that identifies that 2-way radio user's trans-
mission on a data channel.

This scanner lets you select the data channel frequency that you want it to
monitor, so you can hear both the call and response transmissions for that
2-way radio user and therefore follow the conversation.  (You cannot listen
to the data channel itself).


(LB/EB 11/14/97)