M/A-Com Orion, Руководство оператора

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ProScan
The radio may be programmed for ProScan system scan operation for multi-
site applications depending on the version of radio flash code. (The ProScan
algorithm is available on the Orion Platform with Group 32 or higher radio
flash code). ProScan is an improved multi-site system scanning algorithm
designed to replace the ProSound algorithm. ProScan provides the radio with
the ability to select a new system for the radio to communicate on, when the
selected system drops below a predefined level. This is accomplished by
enabling each radio to analyze the signal quality of its current control channel
and compare it with the signal quality of the control channel for each site in its
adjacency scan list. (The signal quality metric used for the ProScan algorithm
is based on a combination of both Received Signal Strength Indicator (RSSI)
and Control Channel Verification (CCV) measurements). When the selected
systems signal quality level degrades below a pre-programmed level, the radio
will begin to look for a better control channel. Once a control channel that
exceeds the pre-programmed parameters is found, the radio will change to the
new system and emit a tone. If the control channel is completely lost the radio
will enter Wide Area System Scanning and search the programmed adjacent
systems until a suitable control channel is found.
Priority System Scan
The radio may also be programmed for Priority System Scan. (To ensure that
this feature operates correctly, the control channel of the priority system must
be located on channel one unless you are using the ProSound/ProScan
algorithm). The priority system is the desired or preferred system. While
receiving the control channel of the selected system, the radio will
periodically leave the selected system and search for the control channel of the
priority system at a programmable rate. The programmable rate is defined by
the value in the Priority Scan Time control, (unless the ProSound/ProScan
algorithm is enabled as explained below). This priority scan timer is reset
each time the PTT button is pressed or when a call is received. If the priority
system control channel is found, or meets the predefined ProSound/ProScan
criteria, the radio will automatically switch to the priority system.
When Wide Area System Scan Is Enabled
If the radio cannot find the control channel of the selected system and begins
to wide area system scan, the radio will only scan for the priority system
control channel if the priority system is in the Wide Area System Scan list.
When ProSound/ProScan Is Enabled
The radio monitors the priority system and will switch to the priority system if
the system meets the criteria defined in the ProSound/ProScan Options Dialog
Box. If ProSound/ProScan is enabled the rate at which the radio will scan for
the priority system is defined by the System Sample Time control.