Crown Macro-Tech MA-3600VZ, Руководство по эксплуатации, Страница: 15 / 28

page 15
Macro-Tech MA-3600VZ Power Amplifier
Operation Manual
5.3 Options
5.3.1 PIP Modules
Versatile PIP (Programmable Input Processor) modules
provide flexible expansion features that can be added to
customize the amplifier. PIP modules plug into the con-
nector inside the back panel of the amplifier.
PIP modules are available with a features ranging from
error-driven compressor/limiters to remote control and
monitoring via IQwic or System Architect Software. Visit
the Crown website at www.crownaudio.com, or contact
Crown Customer Service, for descriptions of available
PIP modules.
5.3.2 IQ-PIP-USP2 Adapter
The IQ-PIP-USP2 Adapter allows the amplifier to accept
the Crown IQ-PIP-USP2 and IQ-PIP-Lite modules (but
not the IQ-PIP-USP3 or IQ-PIP-USP3/CN.) Load moni-
toring and output voltage limiting are not available with
the IQ-PIP-USP2 Adapter.
The IQ-PIP-USP2 offers remote control and monitoring
via Crown’s SmartAmp™ IQ features set, plus a wide
range of digital signal processing capabilities.
Features:
• 24-bit, 48-kHz sampling rate for analog to digital
conversion.
• Programmable DSP filters.
• Greater than one-half second of signal delay for each
channel.
• Input Signal Compressor/Limiter, Thermal Limiter
and Clip Eliminator for each channel.
• Presets for easy recall of settings.
• Auto-Standby for reduced energy costs.
• Error reporting.
• Logic input and output.
• Listen Bus allow easy connection to an audio moni-
toring system.
The IQ-PIP-Lite connects the amplifier to a 100 Mb
Ethernet network allowing it to be remotely controlled and
monitored via IQ.
The IQ-PIP-Lite is a TCP/IQ series component. This
means it connects to an IQ System
®
or Harman Pro Sys-
tem Architect software via 100 Mb Ethernet. This pro-
vides faster IQ communications than the previous current
loop, IQ bus, connectivity method. With this control net-
work option, a large (or small) system can be intercon-
nected using standard off-the-shelf 100 Mb Ethernet
components (Switches, NICs, and cables). The IQ-PIP-
Lite can also be connected to the same network used to
pass CobraNet™ audio
1
.
The audio path in the IQ-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, error reporting
and load monitoring.
5.3.3 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.
5.3.4 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.
5 Advanced Features and Options
Figure 5.1 Input Sensitivity and Ground Lift Switches
1
Note that the IQ-PIP-Lite cannot receive or transmit CobraNet audio.