Options; Iq-Pip-Usp2 Adapter And Pip-Lite Module; Input Sensitivity Switch; Input Ground Lift Switch - Crown Macro-Tech MA-3600VZ Operation Manual

Macro-Tech MA-3600VZ Power Amplifier
5 Advanced Features and Options

5.3 Options

5.3.1 IQ-PIP-USP2 Adapter and PIP-Lite
Module
Available in limited quantity through Crown's Parts
Department, the IQ-PIP-USP2 Adapter allows the ampli-
fier to accept the Crown PIP-Lite module (but not the
PIP-USP3 or PIP-USP3/CN.) Load monitoring and out-
put voltage limiting are not available with the IQ-PIP-
USP2 Adapter.
The PIP-Lite connects the amplifier to a 100 Mb Ether-
net network allowing it to be remotely controlled and
monitored via IQwic or System Architect.
The PIP-Lite is a TCP/IQ series component. This means
it connects to Harman Pro System Architect software or
®
an IQ System via 100 Mb Ethernet. This provides faster
IQ communications than the previous current loop, IQ
bus, connectivity method. With this control network
option, a large (or small) system can be interconnected
using standard off-the-shelf 100 Mb Ethernet compo-
nents (Switches, NICs, and cables). The PIP-Lite can
also be connected to the same network used to pass
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CobraNet™ audio .
The audio path in the PIP-Lite is processed totally in the
analog domain. While DSP-type functions cannot be
supported with this type of architecture, the standard
SmartAmp features are. These features include input
compressors, multimode output limiters, and error
reporting.
Operation Manual

5.3.2 Input Sensitivity Switch

The Input Sensitivity Switch is located inside the back of
the amplifier (Figure 5.1). It is set at the factory to 0.775
volt for rated output into 8 ohms. It can also be switched
to a sensitivity of 1.4 volts, or a fixed voltage gain of 26
dB (4.8 volts for rated output).
How to change the input sensitivity:
1. Turn off the amplifier and disconnect its power cord
from the AC mains power receptacle.
2. Remove the PIP module (two screws).
3. Locate the sensitivity switch access hole inside the
chassis opening as shown in Figure 5.1. It is located
just above the phone jack inputs.
4. Set the switch to the desired position noted on the
access hole label. The position toward the front panel
sets the sensitivity to 1.4 volts for rated output, the
middle position provides a voltage gain of 26 dB, and
the position toward the back panel sets the sensitivity
to 0.775 volt for rated output.
5. Replace the PIP module and restore the power.
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Note that the IQ-PIP-Lite cannot receive or transmit CobraNet audio.

5.3.3 Input Ground Lift Switch

The Input Ground Lift switch is located on the rear panel
(Figure 5.1) and can provide isolation between the input
signal ground and the AC ground. It affects only the
phone jack inputs and has no effect on the input connec-
tors on the PIP module. Sliding the switch to the left iso-
lates or "lifts" the grounds by placing an impedance
between the sleeve of each phone jack and the circuit
ground.
When a PIP module is plugged into the amplifier, only the
noninverted and inverted signal lines are connected in
parallel with the corresponding lines of the input phone
jacks. The signal grounds are not paralleled. For exam-
ple, XLR pins 2 and 3 are connected in parallel with the
tip and ring of the corresponding phone jack. However
pin 1 of the XLR is not connected in parallel with the
sleeve of the phone jack.
Figure 5.1 Input Sensitivity and Ground Lift Switches
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