TRANSCEIVER OPERATION
channel it can be programmed for times from 15 seconds up to 3 minutes, 45 seconds or disabled (not used). If the transmitter is keyed continuously for longer than the programmed time, the transmitter is disabled and an invalid condition tone sounds. Five seconds before
One use of this feature is to prevent a channel from being kept busy for an extended period by an accidentally keyed transmitter. It can also prevent possible transmitter damage caused by transmitting for an excessively long period. Conventional channels can also be programmed with the Penalty and Conversa- tion timers that are described in Sections 2.4.7 and 2.4.8.
2.3.10 TONE ENABLE/DISABLE
The supervisory tones (see Section 2.6) can be enabled and disabled by the Tones
2.3.11 SCANNING
Introduction
Scanning cycles through a list of channels, called a “scan list”, checking each for messages. When a message is detected that your transceiver is programmed to receive, scanning stops and the message is received. Shortly after the message is complete, scanning resumes (unless it has been disabled).
There are two basic scan modes: Standard and Radio Wide. The Standard mode is unique to the type of channel selected (conventional or SMARTNET/ SmartZone), and the Radio Wide mode is the same regardless of the channel type selected. Only one of these scan modes can be enabled at a time. Therefore, if standard scanning is enabled while radio wide scan- ning is occurring, radio wide scanning is automatically
disabled and vice versa. More information on these modes follows.
Standard Scanning
Standard scanning monitors only channels that are the same type as that currently selected. There- fore, if a conventional channel is selected, only conventional channels are scanned, and if a SMARTNET channel is selected, only SMARTNET channels are scanned. Standard scanning is turned on and off by the Scan option switch as follows. If this switch is not programmed, standard scanning is not available.
•To turn standard scanning on, press the Scan option switch. Scanning is enabled when the “ S” icon is indicated in the upper left corner of the display and SCAN x (conventional) or SCAN ON (SMARTNET/SmartZone) is briefly displayed. The “x” is the number of the conventional scan list (1, 2, or 3) that is selected. Refer to Section 2.4.11 for more information.
•To turn scanning off, press the Scan option switch again. The “ S” icon is then no longer indicated and “SCAN OFF” is briefly displayed.
•If the zone or channel is changed while scanning is selected, scanning continues on the same or a different scan list (see scan list information which follows).
Radio Wide Scanning
Radio wide scanning monitors the channels in the preprogrammed radio wide scan list (see information which follows). This list may contain up to 16 chan- nels of any type (conventional or SMARTNET/Smart- Zone) assigned to any zone. Radio wide scanning is turned on and off by the Radio Wide Scan option switch as follows. If this switch is not programmed, radio wide scanning is not available.
•To turn radio wide scanning on, press the Radio
Wide Scan option switch. The 
icon is then displayed continuously and “RWS ON” is displayed
briefly.
November 1999 |
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