8/17/2015
Easier to Read Pro97/2055 Scanner Manual
http://marksscanners.com/97/97.shtml#open_closed
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AFS IDs
are in the form AAFFS where AA is the agency, FF is the fleet, and S is the subfleet. EDACS systems are organized with different IDs assigned to different fleets and
agencies. For example, a valid agency/fleet/subfleet ID identifying all detectives within a police department in an agency might be 06101, where 06 identifies the agency (Police), 10
identifies the Police division (East side), and 1 identifies the Detective division.
Decimal IDs
are shown as a decimal number from 0 to 2047.
You can find a chart showing Decimal and AFS equivalents here:
Conversion Chart
.
LTR IDS are in the format AHHUUU where A is the area code (0 or 1), HH is the home repeater (0120), and UUU is the user ID (000254).
Receive Modes
Contents
Each channel can have its own receive mode:
AM, FM (NFM), CT (CTCSS), DC (DCS), MO (Motorola), ED (EDACS), or LT (LTR) mode.
If the receive mode of the channel is set to CT, PL codes appear in the format xxx.x, where xxx.x is a frequency in Hz.
If the receive mode of the channel is set to DC, DPL codes appear in the format xxx, where xxx is an octal code.
AM Receives AM transmissions.
MO Receives Motorola IDs.
FM Receives FM transmissions.
ED Receives EDACS IDs.
CT Receives CTCSS tones.
LT Receives LTR IDs.
DC Receives DPL (digital private line) tones.
Understanding CTCSS/DCS
Continuous Tone Coded Squelch System (CTCSS) and Digital Coded Squelch (DCS) are two methods used to prevent interference by other radio communications. Your scanner can receive
transmissions that use these codes (or more commonly referred to as tones).
CTCSS and DCS systems all use some form of coded squelch. Coded squelch techniques involve the transmission of a special 'code' signal along with the audio of a radio transmission. A
receiver with coded squelch only activates when the received signal has the correct 'code'. This lets many users share a single frequency, and decreases interference caused by distant
transmitters on the same channel. In all major metropolitan areas of the United States, every available radio channel is assigned to more than one user. Public safety radio systems on the same
frequency are usually set up at a distance of 40 miles apart, or more. This means that you may hear transmissions from a distant system when your local system is not transmitting. By
programming the CTCSS tone for a local channel the scanner will not stop on transmissions from the distant system. With few exceptions, such as the VHF Aircraft and Marine bands, almost
every other VHF or UHF radio system uses some form of coded squelch. By far, CTCSS is the most popular mode among nontrunked systems.
For more information visit Radio Reference's respective pages on
CTCSS
and
DCS
.
Open and Closed Modes
Each channel bank can be set to open or closed mode.
In open mode the scanner will receive:
(1) all channels in AM, FM, CT, and DC modes, that are not locked out.
(2) all IDs in MO, ED and LTR modes, even if they are locked out in the ID list.
In closed mode the scanner will receive:
(1) all channels in AM, FM, CT, and DC modes, that are not locked out.
(2) only IDs in MO, ED, and LTR modes that are programmed into the ID list, and not locked out in the list.
In other words,
If you want to hear all IDs, scan in open mode. If you want to hear specific IDs, program them into the scan lists and scan in closed mode. If you want to hear specific IDs and not hear other
IDs, program them into the scan lists, lock out the ones you don't want to hear, then scan in closed mode.
Keypad and Knob Controls
Contents
Your scanner's keys might seem confusing at first, but this information should help you understand each key's function.
Key
Function(s)
SCAN/
Scans the stored channels in scanning mode and enables Signal Stalker/Spectrum Sweeper.
FUNC(F)
Lets you use various functions by pressing this key in combination with other keys.
MAN
Stops scanning; lets you directly enter a channel number or frequency; steps to next channel in
manual mode.
TRUNK(T)
Automatically stores the trunking ID or holds the trunking ID while scanning.
WX/
(Weather) Selects one of the preprogrammed weather channels.
PRI
Turns the priority function on or off.
TEXT
Lets you input text.
PSE (Pause)
Stops searching or scanning.
MODE
Changes the receive mode (AM, FM, MOT, ED, LT).
(Pro
97)
Locks the keypad to prevent accidental program changes; turns on/off the display backlight.
DIM (Pro 2055)
Adjusts the display brightness.
TUNE
Allows you to tune to a frequency along with
or
.
ATT (Attenuate) Turns attenuation on to reduce the scanner's sensitivity and block extremely strong signals, or turns it
off to increase sensitivity.
or
Selects the scan or search direction; steps up or down through options during programming.
SRCH
Selects one of the service searches or limit search.
L/OUT
Locks/unlocks selected channels while scanning; locks/unlocks specified frequencies during a limit
or service search.
PGM (PROG)
Puts scanner in program mode; steps to next channel in program mode.
ENT
Completes the entry of frequencies, IDs, and text.
CL (Clear)
Clears an incorrect entry.
Number Keys
Enter a channel or a frequency; turn groups on and off in search mode; select which banks to scan in
scanning mode; enter numbers or characters for programming text.
(.) DELAY
Enters a decimal point or space; programs delay time for the selected channel/search bank; hyphen
in trunking ID programming.
Turning On The Scanner And Setting the Squelch
1. Turn SQ fully counterclockwise to min.
2. Turn VOLUME/OFF clockwise
until it clicks and you hear a hissing sound.
3. Turn SQ clockwise
until the hissing stops and then just a little more.
If you are using the scanner for the first time, straight out of the box, you should see all zeros in the frequency display. The scanner will not scan or trunktrack until you
program frequencies
into
the banks. However, you can do a
search
and use the
Signal Stalker
.
A Look at the Display
Contents
