Open Circuit Detect; Loss Of Ac - Extron electronics NetPA Ultra Series User Manual

Open Circuit Detect

For high impedance amplifiers, open circuit detect requires that the speaker chain be
tapped at a minimum of 32 Watts for 70 V systems and 64 Watts for 100 V systems.
For this detection circuit to function, adequate audio signal must be present at the output
channel. The output attenuation meters should be bouncing above -50 dBFS.
If at any point an open circuit is detected (yellow or red status), the system should be
inspected.

Loss of AC

Since status flags are reset after a power cycle, the amplifier only reports this fault for the
short time it remains active after it loses power. This is generally enough time for it to report
loss of power to DSP Configurator before disconnecting. Once power is restored and DSP
Configurator reconnects, the indicator is gray.
In the event that this status is yellow while DSP Configurator is connected to the amplifier,
this represents a short disruption in power.
NetPA U 2002 SB User Guide • DSP Configurator Software 61