Checking Background Interference Levels - EMS iris+ Installation Manual

Checking background interference levels

Access the Main Menu by following the operations listed under the previous
engineering menus
The Iris+ should now be set up to Monitor Background Signals as their presence at a high level
may e ect the performance of the system. To enter this mode from the Main Menu select;
Radio Setup Test Routines
>
*Main Menu*
PINs & Access
System Support
Serial Comms
Pager Setup
Engineer Ctrl
Time & Date
Radio Setup
Output Setup
Logging
Relay Setup
Remote Rxers
Direct Inputs
Network
Txer Grouping
Bus I/O
With Iris+ in Monitor Carrier mode the screen will show any background signals on and around
the frequency at which Iris operates. A typical screen shot is shown below. NOTE: Background
signals are generated by other electronic equipment such as computers, Fax machines, mobile
phones, surveillance cameras.
An acceptable level of background noise is between 0 and 55. Any higher indication may
adversely e ect the performance of the system. If the level is shown to be high, there are a
number of steps that can be taken to reduce the reading, these are outlined overleaf.
' section.
Monitor
>
*Radio Setup*
Add Transmitter
Transmitter Details
Replace Transmitter
Suspend Transmitter
Reinstate Transmitter
Test Routines
Delete Transmitter
Monitoring Carrier
Level
Highest = 27
Carrier.
= 26
13:35
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'Accessing the
*Test Menu*
Monitor Signal
Min/Max Report
Call-In Report
Battery Report
Monitor Carrier