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.Ô

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 110 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

Ó HINT Ó

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.

Ô NOTES Ô

•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 87.

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