Operation; Volume Control; Indications; Standby Mode (Power Remote) - Dynacord DSA 8405 Bedienungsanleitung

3 Operation

3.1 Volume Control

In DUAL and PARALLEL mode, the level
controls LEVEL on the power amp's
rear panel are used to control the am-
plification of the corresponding chan-
nel. The scale values are given in dB.
Turning the control to the right increas-
es and turning it to the left decreases the volume. In
BRIDGED mode operation, the output volume for a pair of
outputs is only controlled by the level control of the chan-
nel with odd number (1, 3, 5 or 7), the setting of the chan-
nel with even number (2, 4, 6 or 8) is ignored.

3.2 Indications

PROTECT
The PROT LED lights indicating that one
of the internal protection circuits
against thermal overload, short-circuit, Back-EMF, HF-oc-
currence at the output, etc., has been activated. In that
case, the connected load is separated from the power
amps to prevent the connected loudspeaker systems and
the power amplifiers as well from being damaged. What-
ever caused the fault – e.g. a short-circuited speaker ca-
ble – needs to be remedied. In case of thermal overload
you have to wait until the power amplifier automatically
regains normal operation.
MUTE
The MUTE LED lights red whenever the
power amp's output signal is being
muted, which happens when manually muting the output
signal via IRIS-Net.
-30 B...LIMIT
D
Level indication is realized via vertical
LED chains on the power amp's front
panel that individually indicate the actu-
al levels of each channel at -30dB, -
10dB and -3dB below full modulation.
The LIMIT LED lights as soon as the in-
tegrated dynamic audio limiter is activated and the power
amplifier is driven at the clipping limit or generally at its
maximum capacity. Short-term blinking is not a problem,
because the internal limiter controls input levels of up to
+21 dBu down to a THD of approximately 1%. If, on the
other hand, the LIMIT LED light constantly, reducing the
volume is recommended to prevent the loudspeaker sys-
tems connected from being damaged by probable over-
load.
POWER
The POWER LED lights green when the
power amplifier is on. If the POWER
LED does not light, despite the fact that the amplifier has
been switched on, this indicates that the power amp is
not connected to the mains or the primary fuse has
blown.
STANDBY
The STANDBY LED lights yellow when
the power amp is in standby mode.
Standby mode reduces the amp's power consumption to
an absolute minimum. Activating the standby mode is
possible via IRISNet or the POWER REMOTE port at the
amp's rear panel.
IRIS-N
ET
The IRIS-Net LED lights blue if an IRIS-
Net compatible remote control module
has been installed in the power amp's extension slot and
successful data communication has been established.
The IRIS-Net LED blink slowly whenever the "Find" func-
tion in IRIS-Net is being used to locate a power amplifier
in the rack.

3.3 Standby Mode (POWER REMOTE)

function is only useful for appliances not employing a Re-
mote Control Modul. Controlling appliances with Remote
Control Module installed per REMOTE CONTROL is prac-
tically pointless. Leaving the pins of POWER REMOTE
socket open the appliance power is switched on. When
connecting the pins the applicance enters standby mode.
D S A
IGITAL YSTEM MPLIFIER
POWER REMOTE pro-
vides a simple way to
remotely power-on/off
the power amplifier.
The POWER REMOTE
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