User's Manual

20-496 Owner’s Manual Draft Page 11/78
bank.
HINT: For example, if you wanted to find active frequencies between a range of 150.1000 and 150.5000,
you would put both of those frequencies in the limit search bank.
UNDERSTANDING YOUR SCANNER’S CHANNEL RECEIVE MODES
You can program each channel with any one of six receive modes (AM, FM/Digital, CTCSS, DCS, Motorola,
and EDACS).
Each receive mode affects how your scanner operates when scanning and receiving transmissions.
Notes:
. Trunked modes (ED and MOT) can only be selected for frequencies above 137 MHz.
. Your scanner’s Closed Mode lets you hear transmissions from only those trunking talkgroups you specify.
For more information, see “Open and Closed Mode Operation” on Page XX.
AM Mode (AM)
The AM mode sets the scanner to receive transmissions using amplitude modulation (AM), primarily used
for aircraft, military, 27 MHz citizen’s band, some amateur radio, and some government transmissions.
(Refer to “Specifications” on Page XX for a list of the frequencies covered.) When the scanner receives a
transmission on a channel set to the AM mode, it always stops on the transmission.
FM/Digital Mode (FM)
The FM/Digital (FM) mode sets the scanner to receive transmissions using frequency modulation (FM) and
APCO-25 digital modulation. FM is used for most public safety transmissions, as well as broadcast,
business, and amateur radio transmissions. APCO-25 digital modulation is used in many newer
conventional and trunked public safety radio systems. When the scanner receives a transmission on a
channel set to the FM/Digital mode, it always stops on the transmission.
CTCSS Mode (CT)
CTCSS mode sets the scanner to receive transmissions using frequency modulation (FM) with Continuous
Tone Coded Squelch System (CTCSS) subaudible tone codes. CTCSS allows multiple users to share a
single radio frequency without hearing each other’s transmissions. In your PRO-2096 scanner, the CTCSS
feature can be used to block the reception of transmissions on shared channel to only those that use the
CTCSS tone that you have specified. CTCSS mode also features a Code Search setting that allows you to
instantly display and store unknown codes into the channel memory. CTCSS tones can sometimes be
heard as a low “hum” in the background of a voice transmission. Many systems that use CTCSS transmit a
special “turn off code” at the end of each transmission. The turn off code causes a properly equipped
receiver to mute before the transmission ends, eliminating the “squelch tail” burst of noise the commonly