4000085164

Line Surveillance Board

Item Number: 4000085164

Speaker line surveillance for P-1670

The LINE SURVEILLANCE BOARD is divided into 3 major modules:
1. PA line / loudspeaker loop surveillance
2. Power amplifier surveillance
3. Earth leak surveillance

The Power amplifier surveillance module is fully automatic and no adjustments are available.
The Earth leak surveillance circuit is possible to adjust, but the factory setting of 1 MΩ leak limit should not be necessary to alter.
The PA line / loudspeaker loop surveillance circuit is subject to 3 different adjustments; an optimalisation of the (current) detector circuit and low and high load limits.
The PA line / loudspeaker loop surveillance circuit is working by generating a 19.2 KHz tone (above the upper hearing limit). The circuit transmits it on the line and measures the power output performance.

GENERAL
Dimension (WxHxD) 160 x 20 x 100 mm
Mounting Inside enclosure of P-1670 amplifier
Weight 0.3 kg
Operating temperature -15°C to +55°C

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