USL CM-8E - Manual (Page 18)

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5.4.4 Terminal Block Amplifier Connectors
The CM-8E provides pluggable terminal blocks to connect to the power amplifiers. These are
commonly used with amplifiers that do not use the DE-15 connectors. Balanced outputs (+ and
-) are provided for amplifier channels A and B. As with the DE-15 connectors, channel A carries
the low band and channel B carries the high band in biamped installations. These are marked
with l and h on the rear panel (for example, Lh+ for the positive side of the high band of the left
channel). If there is not a crossover before the CM-8E, the full range signal will be available on
the low band output of the CM-8E. In addition, terminals marked E (earth) are available for
connection to cable shields.
There are also pluggable terminal blocks to connect to amplifier outputs when DE-15
connectors are not used. One of these terminals connects to the positive terminal each
amplifier output. The E terminal should be used to connect to a cable shield. Do NOT connect
this to the negative output of the amplifier. Doing so could damage the amplifier or result in
feedback. As with the terminals driving the amplifier, l is for the low band (channel A) and h is
for the high band. If biamped amplifier outputs are not available, connect only to the ‘l’
terminals (the low band return).
5.4.5 LFE Connections and Configuration
The CM-8E can drive up to four LFE amplifiers. All four can be driven by a single LFE input from
the processor, or LFE3 and LFE4 can be driven by the “spare” input (on the top DB25 connector
on the rear panel). A 6 pin header with two jumpers is visible on the rear panel. Move both
jumpers to the top position (jumping top left to middle left and top right to middle right) to
have the LFE input drive LFE3 and LFE4. Move these jumpers to the bottom position to have
the spare input drive LFE3 and LFE4.
5.4.6 HI/VI-N Connections
The CM-8E includes a pluggable terminal block for connection to the HI and VI-N outputs of the
sound processor. A cable should be run from the CM-8E to these outputs on the sound
processor. At the sound processor, these terminals also connect to the HI/VI-N transmitter
(such as a USL UPC-28). These connections allow the CM-8E to show the levels of the HI/VI-N
signals and allow the signal to be listened to both locally and remotely.
5.4.7 Ethernet Connector
The Ethernet connector allows for remote monitoring of the audio passing through the CM-8E.
A remote web browser can be used to select audio to listen to, see levels, and listen to the
audio. In addition, the Ethernet connector is used when configuring the CM-8E.