Motorola JT 1000 Manuale d'uso - Pagina 16

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Channel Scan™ Features

Description

The scan feature allows the user to monitor activity on different channels.

The radio is capable of scanning up to 16 channels in the scan list, with one list

available per radio. A radio can be programmed via Radio Service Software for

either non-priority or priority channel scan with PL/DPL or carrier squelch

operation.

Notes:

• A radio programmed for non-priority channel scan, will not have priority-

channel capability.

• With scan on, the menu system and the DTMF feature are both

non-functional.

Non-priority channel scan means no scan channel has priority over another.

The scanner stops on the first scan channel with activity. When activity is over

and the "hang time" has expired, scan proceeds to the next active channel. Hang

time is the amount of time that the radio user has to respond to a received

transmission. Hang time is programmable on a per-radio basis.

Priority channel scan means that any one of the radio's scan channels may

be designated as a priority channel. The priority channel is checked for activity

more frequently than non-priority channels. If the radio is locked on a non-priority

channel and activity is detected on the priority channel, the radio will leave the

non-priority channel and lock onto the priority channel. An alert tone is generated

to indicate that a priority message is being received.

Note: With scan on, the channel selected automatically becomes a member

of the scan list.

Three types of scan are available:

Automatic Scanning (Auto Scan) – is preprogrammed in the radio using

Radio Service Software, and slaved to one or more channels. A radio with

auto scan will automatically begin scanning whenever the auto scan channel

position is selected. When auto scan is programmed to a channel, that

channel will always operate in the scan mode. The number of auto-scan

channels is equal to one less than the number of channels in the radio.

Preprogrammed Conventional Channel Scan – is preprogrammed in the

radio using Radio Service Software.

Operator-Selectable Conventional Channel Scan - lets the user program the

scan list by using a combination of side buttons or toggle switch, and the

channel selector knob. The programming procedure is explained, in detail, in

paragraphs titled "Programming Operator-Selectable Channel Scan."

Transmitting (pressing the PTT) while in the scan mode is accomplished in

one of three ways (programmed via Radio Service Software):

•

Revert to Selected Mode – lets you transmit while scanning is in

progress. The transmission will occur on the channel selected by the

channel selector.

Radio Operation

with Features (cont.)