Instruction manual

Input Processing Modules - Internal Options
Input sensitivity/voltage gain jumper
Input modules have user-settable jumpers to configure Input Gain/Sensitivity. These internal
jumpers (two for CC-IPB, three for all input NC modules), labeled “W1 W2 W3”, are used to set
the overall gain of the amplifier.
The 3 positions (shown at left) allow
the amplifier to be set for constant gain
of X20 (26 dB), X40 (32 dB), OR con-
stant sensitivity for full output (.775V)
at 0 dBu input. The standard factory
setting is for X40 (32dB). All jumpers
must be set to the same position as
shown.
To change jumper settings, the Input
module must first be removed from the
amplifier.
Warning! Amplifier must
be removed from AC
mains supply before this
operation is undertaken!
The diagram at left shows the location
of these jumpers on the CC-IPB mod-
ule. The diagram at the lower right
shows the location of the jumpers on
the NC-IPN module.
NexSys/N-Coder jumper
All NC Modules have internal jumpers used to set the module for operation with NexSys or N-
Coder. These jumpers are labeled “W4 W5” on the Input module circuit board.
The “NC-NXS” jumper position
allows operation with NexSys,
while the “NCODE” jumper posi-
tion permits the Input module to be programmed through N-Coder or N-Coder/PC software when
the amplifier is off.
Note: Factory setting is the ‘NexSys’ position. If NexSys, N-Coder, or N-Coder/PC software is not
being used, jumper position will have no effect upon the operation of the amplifier.
+26dB
0dBu Sen
+32dB
W2
W1
W3
W4
W5
N-CODE
NC-NXS
CREST AUDIO
2 6 C 2 7 9 7 - 0 2
Input Gain/Sensitivity Jumpers
Nexsys / N-Coder Jumpers
N-Coder Setup
NexSys Setup
N-CODE
NC-NXS
N-CODE
NC-NXS
CREST AUDIO
2 6 C 2 1 9 7 - 0 2
Input Gain/Sensitivity Jumpers
W1
+26dB
W2
A
B
0dBu IN
+32dB
+26dB
0dBu
+32dB
+26dB
0dBu
+32dB
+26dB
0dBu
+32dB
+26dB
0dBu
+32dB
.775V / 0 dBu (For Full Power)
X20 (+26 dB)
Channel A Jumper
Channel B Jumper
NexSys Indicator Jumper (NC-IPN Only)
X40 (+32dB) Standard Factory Setting
+26dB
0dBu
+32dB
+26dB
0dBu
+32dB