Crown ScreenArray PIP-3632, Operation Manual

Page: 6 / 20

ScreenArray
®
PIP Modules
Page 6
Operation Manual
2.3 Choice of Input
Connector and Pad
The HD15 connector on Screen Array
PIPs provides input signal and amplifier
output monitoring with popular cinema
monitor products such as the USL
CM680.
Input and output sensitivity for the USL
CM680 and similar products is 3Vrms.
This relatively high sensitivity coupled
with the gain found in ScreenArray PIPs
limits headroom. For example, the PIP-
3632 has approximately 11dB of gain at
20 kHz. If the input is 3Vrms at 20 kHz,
there is only 2dB of headroom. In the
vast majority of systems this reduced
headroom will not be a problem.
However, if more headroom is needed,
consider using the defeatable 6.6dB
pad in the PIP ScreenArray
crossovers. When activated, this pad
will attenuate an incoming 3Vrms signal
to 1.4Vrms- providing approximately
8.6dB for headroom. Jumper Z1 is in the
0dB attenuation position by default
(Figure 2.2).
As seen in Figure 2.3, the HD15
connector and the removable terminal
are in parallel. Care should be taken to
not drive both inputs at once. However,
it is acceptable to use the removable
terminal connector to "jumper" the input
signal to another amplifier if necessary.
When a PIP ScreenArray module is
used in conjunction with an USL CM680
or similar product, a single standard
VGA cable can be used to provide input
audio and output voltage-confidence
monitor to and from the amplifier.
A standard VGA cable is a male-to-
male cable with High Density 15 pin
connectors on each end. VGA cables
are readily available at most electronics
and computer stores, as they are
utilized on almost every computer
monitor currently in production. (VGA
cables are not included with the PIPs.)