Toa VP-2241, Инструкция по эксплуатации

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Chapter 2: PRODUCT DESCRIPTIONS
2. NOmENclATurE AND fuNcTIONS
2-22
2.15. Power Amplifiers VP-3154, VP-3304, and VP-3504
[Front]
[Rear]
1
This figure shows VP-3504.
2 3 4 5 6
7
Three different configurations can be used in the VX-2000 system: 150 W x 4 channels, 300 W x 4 channels,
and 500 W x 4 channels.
Note
The VP-3000 series amplifiers can be used in conjunction with the VX-3000DS only, but not with the VX-
2000DS.
1. Channel Status Indicators [SIGNAL, PEAK,
OPERATE, POWER]
• OPERATE and POWER indicators
OPErATE: Indicates whether power amplifier is
normally operating (lit green) or not
(unlit).
POWEr: Indicates whether power is supplied
to the amplifier (lit green) or not
(unlit).
*
1
The built-in protection circuit operates if some
irregularities occur inside the amplifier such as
abnormal temperature rise or fan failure.
• SIGNAL and PEAK indicators
SIGNAl indicators light green and PEAK
indicators light red when input signals applied
to the PA lINK connector (4) or the BGm input
terminal (5) exceed the following levels.
[Input signal levels to light indicators]
*
2
0 dB = 1 V
*
3
factory-preset sensitivity
*
4
Sensitivity after modification (see
p. 8-42 .)
2. Functional Earth Terminal [SIGNAL GND]
Hum noise may be generated when external
equipment is connected to the unit. connecting
this terminal to the functional earth terminal of the
external equipment may reduce the hum noise.
Note:
This terminal is not for protective earth.
3. Output Terminals [PA OUT (SP LINE)]
connect to the power amplifier input terminal of the
VX-200SP or VX-200SZ module mounted in the
VX-2000Sf Surveillance frame.
The speaker line output voltage can be changed by
internal modification.
For the modification procedure, see
p. 8-40 .
Operating Status OPERATE POWER
In-use Lit
Standby
DC fuse blowout
Unlit
Protection*
1
activated
Lit
Lit
Lit
Unlit
Unlit
Unlit
Input terminal
PEAK
indicators
BGM input (−10 dB*
2
*
3
)
PA lINK connector's
audio input
−2.5 dB*
2
BGM input (0 dB*
2
*
4 )
SIGNAl
indicators
−20 dB*
2
−30 dB*
2
−20 dB*
2
−12.5 dB*
2
−2.5 dB*
2