Uniden America Corporation UB345 사용자 설명서
Features
Your RadioShack 1000-Channel Trunking Scanner is one of a new generation of scanners designed to track
Motorola
®
Type I, Type II, hybrid analog systems, (such as Smartnet
®
and Privacy Plus
®
) plus M/A-COM
EDACS
®
and EF Johnson LTR. Those systems are extensively used in many 800 MHz, 900 MHz, and UHF
communication systems.
Trunking communications systems let a large group of 2- way radio users (or even different groups of 2-way
radio users) efficiently use a set of frequencies. Instead of selecting a specific frequency for a transmission, the
user simply selects a talk group. The trunking system automatically transmits the call on the first available
frequency, and also sends (on a different frequency called a data channel) a code that uniquely identifies that
transmission.
Since the trunking system might send a call and its response on different frequencies, it is difficult to listen to
trunked communications using a regular scanner. The scanner lets you select and monitor the data channel
frequency sent with a 2-way radio transmission, so you can hear the call and response for that user and more
easily “follow” the conversation.
The scanner also lets you scan conventional transmissions, and it is preprogrammed with service banks for
convenience. By pressing a single button, you can quickly search those frequencies most commonly used
by public service and other agencies, without tedious and complicated programming.
This scanner gives you direct access to over 37,000 exciting frequencies, including police and fire departments,
ambulance services, and amateur radio services, and you can change your selection at any time.
Your scanner also has these special features:
Signal Stalker
Trunking communications systems let a large group of 2- way radio users (or even different groups of 2-way
radio users) efficiently use a set of frequencies. Instead of selecting a specific frequency for a transmission, the
user simply selects a talk group. The trunking system automatically transmits the call on the first available
frequency, and also sends (on a different frequency called a data channel) a code that uniquely identifies that
transmission.
Since the trunking system might send a call and its response on different frequencies, it is difficult to listen to
trunked communications using a regular scanner. The scanner lets you select and monitor the data channel
frequency sent with a 2-way radio transmission, so you can hear the call and response for that user and more
easily “follow” the conversation.
The scanner also lets you scan conventional transmissions, and it is preprogrammed with service banks for
convenience. By pressing a single button, you can quickly search those frequencies most commonly used
by public service and other agencies, without tedious and complicated programming.
This scanner gives you direct access to over 37,000 exciting frequencies, including police and fire departments,
ambulance services, and amateur radio services, and you can change your selection at any time.
Your scanner also has these special features:
Signal Stalker
—you can set the scanner so it detects and provides information about nearby radio
transmissions.
Triple-Conversion Circuitry
Triple-Conversion Circuitry
— virtually eliminates any interference from IF (intermediate frequency) images,
so you hear only the selected frequency.
100 Channel-Storage Banks
— you can store up to 100 channels in each of 10 different banks, for a total of
1000 channels, so you can more easily identify calls.
Ten Scan Lists
Ten Scan Lists
— you can store up to 100 trunking talk group IDs in each trunk scanning bank.
Digital Weather Alert
— uses the digital SAME (specific area message encoding) signal transmitted with
weather alerts to identify the type of alert being issued.
Note:
Note:
This scanner does not use the specific area feature of SAME. It responds to all alerts received.
Two-Second Scan Delay
— delays scanning for about 2 seconds before moving to another channel, so you
can hear more replies that are made on the same channel.
Lock-Out Function
Lock-Out Function
— lets you set your scanner to skip over specified channels or frequencies when scanning
or searching, and skip over talk group IDs when tracking trunked systems.
Priority Channels
Priority Channels
— lets you program one channel in each bank (10 in all) and then have the scanner check
that channel every 2 seconds while it scans the bank, so you do not miss transmissions on those channels.
Four Service Banks
—
frequencies are preset in separate police (fire/emergency), aircraft, ham, marine to
make it easy to locate specific types of calls
.