User's Manual

ProScan

The radio can 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 M7100

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

system’s 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 can 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

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 priority 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.