Reference
Communication port con
fl
icts.
The Aggregator will display the message
“An attempt was made to access a socket in a way forbidden by its access
permissions” if it detects con
fl
icts with another device on a communication
port. To correct this problem, perform the following steps:In this case, you
will need to edit the Con
fi
guration.xml
fi
le to change the communication
ports to an unused port number.
1.
On the PC or server that is hosting the RFM220 Aggregator, open a
command prompt window and enter the following command to view a list
of the ports on the PC that are currently in use.
netstat –anobv
2.
Check that none of the listed ports are used in the Con
fi
guration.xml
fi
le.
3.
If a port listed by the netstat command is used in the Con
fi
guration.xml
fi
le, edit the
fi
le to change the port number to an unused port.
SNR alarm will not clear.
When a RFM220 instrument is reset, the alarm state
for the SNR test is set to true. This is because during the instrument reset,
the SNR value is set to 0. If the Aggregator is started after the instrument
is reset, it will be observed that the SNR value will go below the threshold
with no alarm being reported (because the alarm state is already set to true).
The work-around for this situation is to
fi
rst clear the SNR alarm by setting
a lower value for the Clear Threshold, and then later setting new Active and
Clear thresholds. Resetting the instrument to the factory default settings will
not solve this issue.
Compensation for an external attenuator.
If your input signal has an external
attenuator, you need to adjust the alarm thresholds to compensate for the
attenuator. The Channel Input Level upper threshold will not adjust past the
–30 dB maximum.
86
RFM220 User Manual
Summary of Contents for RFM220
Page 1: ...xx RFM220 ISDB Tb Measurement Demodulator ZZZ User Manual P071289600 071 2896 00...
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Page 22: ...Compliance Information xii RFM220 User Manual...
Page 26: ...Preface xvi RFM220 User Manual...
