Biamp VO-4e Bedienungsanleitung PDF herunterladen (Seite 8)

VO-4e REAR PANEL

Amp Fault Imputs

Four amplier Fault Inputs are provided via a six-way 0.2” (5.08mm) pluggable screw terminal block. These allow

for fault monitoring of the output of the VO-4e as indicated from an external amplier. By default each input allows

an external voltage-free contact closure to ground to indicate a fault condition for the corresponding VO-4e Output

channel. Inputs are pulled high internally to create a default non-asserted condition. When congured for device

failover the Amp Fault Input connections must be paralleled between the main and failover device. This is software congurable so if

inverse operation is required this can be adjusted per input.

Output Fault Detection (VO-4e output channel used in conjunction with a Vocia End of Line Device 1 [ELD-1])

The VO-4e monitors audio output circuit integrity per channel by monitoring multiple out-of-band (inaudible), high frequency tones in

conjunction with ELD-1 devices that have been assigned to the relevant channel using the Vocia software. To prevent the possibility of

interference with these monitored tones:

• Recorded audio messages or audio content with continuous or swept tonal components (e.g., alert tones) should be band limited at

15 kHz during recording;

• Program signal levels should be adjusted to minimize clipping, as severely clipped signals may also affect these out-of-band fault

detection tones.

• The use of shielded speaker cable is not supported;

• Highly capacitive speaker lines or loads may prevent correct operation of the ELD detection system;

• Legacy monitored speaker circuits that use capacitors and resistors or similar methods must have all legacy monitoring circuitry

removed for correct operation of the ELD detection system;

• If legacy speaker systems and speaker wiring are to be re-used, these must conform with the requirements herein;

• Any external power amplier equipment must be capable of relaying the out-of-band fault detection tones to the ELD-1. For reliable-

performance a frequency response of better than -3dB at 24kHz must be supported through the amplier and all speaker wiring up to

the End of Speaker Line connections on the ELD-1s;

• The amplier gain or level control must be set so that nominal output level from the VO-4e (-10dBu, 0dBu or +4dBu; as set in Vocia

software) delivers an output level from the amplier 6dB below the amplier maximum output level (clip level). This setting must be

accurate and must remain constant for predictable operation of ELD-1 units.

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Keine Kommentare

Biamp VO-4e Bedienungsanleitung Seite 8