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Scanning Channels
Scanning allows a HF transceiver to monitor several channels for incoming calls. It
is particularly useful as the nature of HF signal propagation means that not all
channels are available for communications at one time. For instance, a station
calling a station that is in scanning can send a “Beacon Call” on any channel
knowing the station it is calling is monitoring all its available channels. A response
from the scanning station will only occur on channels that are “open” for
communication.
Stations in scan can also monitor channels for voice activity or signals received that
has a signal strength over a preset level.
Selcall Scan
When a Selcall signal is detected, and the channel has Selcall enabled, no matter
which mute type is selected the transceiver will stop scanning and decode the
Selcall. The transceiver will only stop scanning when a Selcall is detected.
Signal Strength Scan (SSL Scan)
If the signal strength mute (squelch) is active and a signal with a level greater than
the pre-set threshold is received the scan will halt. Scan will remain halted while the
signal level stays above the preset threshold. Once the signal decreases below the
pre-set threshold level, for a period greater than the scan dwell period, scanning will
resume.
Voice (Syllabic) Scan
If the audio mute (squelch) is active and is opened scanning will halt. Scanning will
remain halted while the audio mute is open. Once the mute closes, for a period
greater than the scan dwell period, scanning will resume.
The Barrett 2090 transceiver has up to eight scan tables available each table being
able to be programmed with up to thirty channels. (See Menus and Programming
for details on channel entry)
Содержание 2090
Страница 33: ...33 of 246 then press the key ...
Страница 35: ...35 of 246 then press the key or press the key and the last station called will be called again ...
Страница 66: ...66 of 246 then press the key type in your messages using the alpha numeric keys then press the key ...
Страница 90: ...90 of 246 use the Scroll keys to select Yes to erase the address book entry then press the key ...
Страница 92: ...92 of 246 enter the telephone number using the numeric keys up to 16 digits then press the key ...
Страница 94: ...94 of 246 enter the new telephone number using the numeric keys up to 16 digits then press the key ...
Страница 96: ...96 of 246 then press the key ...
Страница 99: ...99 of 246 then press key to save the new alias ...
Страница 109: ...109 of 246 Add an Entry press the key type in a new label using the Alpha keys then press the key ...
Страница 116: ...116 of 246 Upload Pack See section Cloning programming from another transceiver ...
Страница 124: ...124 of 246 then press the key ...
Страница 134: ...134 of 246 then press the key Change the Selcall format associated with the ID if required then press the key ...
Страница 183: ...183 of 246 Pressing the key displays the link status Or if more than one link is in progress example 3 links ...
Страница 217: ...217 of 246 Using the numeric keypad enter Six digit ID and press the key then press the key to proceed with cloning ...
Страница 220: ...220 of 246 Rapid Deployment Hand Crank Generator P N 2090 03 04 ...
Страница 222: ...222 of 246 ...
Страница 223: ...223 of 246 Rapid Deployment Hand Crank Generator P N 2090 03 04 ...