53
© 2020 ATEÏS Europe B.V.
6.9
How to monitor amplifiers and loudspeaker lines
§
Click on
Basic config
>
Monitoring.
Amplifier monitoring is based on voltage ratio between amplifier signal input and output, measured on
pilot tone signal.
Loudspeaker line monitoring is based on impedance measurement, measured on pilot tone signal.
Pilot tone frequency can be set to 20 or 22k Hz. 1k Hz reference is used to check if loudspeaker line
wiring is correct or not.
More than one amplifier can be configured as backup amplifier. But only one backup amplifier can used
at one time. If this backup amplifier is faulty, second backup amplifier takes over, and so on according to
number of backup amplifiers.
Parameter
Access
Description
Power mode
Read / Write
Power supply monitoring: AC only, DC only or AC and DC
Frequency
Read / Write
Monitoring frequency for impedance measurement: 20 or 22k Hz
Gain tolerance
Read / Write
Difference between amplifier gain measure and reference before
fault report
Impedance tolerance
Read / Write
Difference between loudspeaker line impedance measure and
reference before fault report
Leakage threshold
Read only
Fault report if earth leakage measure is lower than leakage
threshold
Monitoring
Read / Write
Monitoring mode: Not monitored, Amplifier only, Amplifier + Line,
Backup amplifier
Amp Gain Unloaded
Read only
Amplifier gain reference when loudspeaker line is not connected to
amplifier (internal relay open)
Amp Gain Loaded
Read only
Amplifier gain reference when loudspeaker line is connected to
amplifier (internal relay closed)