Logitek BRIGHT-VU, Руководство по эксплуатации и обслуживанию

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2-8 Connecting Analog Input Models
The Bright-VU accepts balanced or unbalanced in-
puts via rear panel XLR connectors on analog input
only models or 3-circuit 1/4" phone plugs on dual input
models. The connectors are wired as follows:
Balanced Connection
Pin 1 or Sleeve Shield
Pin 2 or Tip
Pin 3 or Ring Signal -
Unbalanced Connection
Pin 1 or Sleeve Shield
Pin 2 or Tip Center Hot
Pin 3 or Ring Connect to pin 1
The Bright-VU shield pins are bonded directly to
the chassis at the connector and do not share any
ground paths with the internal circuitry. This allows ca-
ble shields to be connected at both ends without caus-
ing hum problems.
The zero reference level for each input can be set
anywhere between -10 dBu and +20 dBu by adjusting
the multiturn gain control located adjacent to each in-
put connector. A small flat blade screwdriver is
needed to adjust the gain.
2-9 Alarm Output
Bright-VU units ordered with the alarm option have
a SPST relay closure that can be triggered by several
selectable fault conditions. The relay contacts are
brought out on the rear panel terminal block.
The alarm function is controlled by an eight position
DIP switch located on the DSP control card inside the
enclosure. To gain access to the DIP switch you must
remove the meter cover plate. The following tables de-
scribe the alarm parameters available.
Alarm Control
Sw7 Function
Off Alarm output OFF
On Alarm output ON
Too Low Alarm
Sw1 Sw2 Function
Off Off -20 dB below 0 dB
Off On -30 dB below 0 dB
On Off -35 dB below 0 dB
On On -45 dB below 0 dB
Too High Alarm
Sw3 Sw4 Function
Off Off +3 dB above 0 dB
Off On +6 dB above 0 dB
On Off +9 dB above 0 dB
On On +12 dB above 0 dB
Alarm Activation Delay
Sw5 Sw6 Function
Off Off 30 Seconds of continuous fault
Off On 60 Seconds of continuous fault
On Off 120 Seconds of continuous fault
On On 300 Seconds of continuous fault
Peak Display Control
Sw8 Function
Off Peak Dot OFF
On Peak Dot ON
The alarm output is available on the rear panel DIN
connector. All alarms within a single unit share the
same relay. Wire a 5-pin male DIN connector as fol-
lows:
Page 6 ** Bright-VU Instruction Manual **
Male DIN solder side
Relay -
Relay +