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If the system is not performing as expected in terms of range, monitoring the Comms
between the Iris+ Receiver and the Remote Receivers may well indicate a connection
problem. For example, a large number of Time-outs by a particular Remote Receiver, indicates
a poor connection, poor screening, or the cable passing near enough to a data cable to
introduce interference on the Bus. For correct communication, the amount of time-outs
generated by any Remote Receiver must be less than one minute. To check the amount of
time-outs generated, it is necessary to view the 'Monitor Comms' display as previously
outlined, for this time period.
Testing the System
Once the Iris+ and Remote Receivers have been installed, the transmitters should be tested to
ensure sitewide coverage is achieved. Each test transmission received by the system will have
a signal strength value, up to a maximum value of 255. To ensure satisfactory communication,
the transmitters signal strength should exceed the Background Level on the Iris+ by 30.
Measuring the Background Level
To measure the Background Interference Level on the Iris+, the following steps will need to be
carried out. Turn the Iris+ control key to the Reset Position. Press the
engineers pin number to access the Main Menu.
From the Main Menu:
Use the
highlighted.
Press the
Use the
highlighted.
Press the
Use the
highlighted.
Press the
A typical carrier display is shown below. See the Iris+ Instructions for further
information if required.
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&
keys to scroll through the menu, until
1
key, to select.
&
keys to scroll through the menu, until
1
key, to select.
&
keys to scroll through the menu, until
1
key, to select.
Monitor Carrier
Level
Highest = 27
= 26
14:30
Figure 7
Page 9 of 16
0
key and enter the
>Radio Setup<
is
>Test Routines<
>Monitor Carrier<
MK108 Iss4 27/07/2018 AJM
is
is
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