Crest Audio NC-IPN - TECHNICAL Instruction manual

Features:
• NexSys-compatible gain control
• Programmable precision attenuation via NexSys network, N-Coder or N-Coder/PC software.
• Balanced input barrier strip connectors • Removable gain pot knobs for security
• Input isolation transformers optional • Simple setup, tamper-proof configuration
Internal Features:
• Jumper-selectable gain of X20 (26 dB), X40 (32 dB, factory setting), or constant sensitivity for full output at 0dBu (.775V) in.
NC-IPN Programmable Gain Input
Product Information
The NC-IPN Module fits in the Input Processing bay located on the rear
panel of Crest Audio CKS, CKV & CKX Series Power Processing
amplifiers. It includes programmable gain elements and provision for
optional input isolation transformers. In conjunction with NexSys®soft-
ware, the hand-held N-Coder or N-Coder/PC software, the NC-IPN can
also function as a precision attenuator in NexSys and non-NexSys con-
trolled applications.
An internal jumper selects between gains of X20 (26 dB), X40 (32 dB),
or constant sensitivity for full output at 0dBu (.775V) in. The standard
factory setting is for X40 (32dB). Individual channel attenuators are pro-
vided with removable knobs for extra security. The NC-IPN is program-
mable via NexSys, the hand-held N-Coder or N-Coder/PC software.
(NexSys-compatible Power/Output and Network NC modules are
required for NexSys implementation.)
Architects and Engineers Specifications - NC-IPN.
The module shall plug into Crest Audio CKS or CKV Power Processing amplifiers in the
Input Processing bay. The module shall be NexSys-compatible. Barrier strip input connec-
tions shall be provided which feed two electronically balanced inputs. Two removable-knob
gain pots shall be provided that control the level of each input.
An internal input sensitivity/voltage gain jumper shall be provided with selections of 0dBu,
X20 and X40. Programmable gain elements shall be provided that can be controlled/pro-
grammed either by NexSys via an NC-NXS module (if fitted), a hand-held N-Coder or N-
Coder/PC software. The module shall be designated the Crest Audio model NC-IPN.
INPUT PROCESSING MODULE
FOR CKS, CKV & CKX SERIES
POWER PROCESSING AMPLIFIERS
8
1
9
2
A
3
B
4
C
5
D
6
E
7
F
8
1
9
2
A
3
B
4
C
5
D
6
E
7
F
Model
Name
CKS 100
CKS 200
CKS 400
CKS 800
CKS 800-2
CKS 1200-2
CKS 1600-2
Output Power
@8Ω/Ch.
50W
100W
200W
400W
400W
600W
800W
Model
NC-NXS
Hi
Data
Lo
Crest Audio Inc.
100 Eisenhower Dr.
Paramus, New Jersey 07652 USA
Designed & manufactured in the USA by:
Network
+– +–
Address
Model
Name
CKV 100
CKV 200
CKV 400
CKV 800
CKV 1600
CKV 2400
Output Power
@70.7V
50W
100W
200W
400W
800W
1200W
Model
NC-IPN
++
Input A Input B
–
–
78
9
5
2
0
1
346
10
78
9
5
2
0
1
346
10
N-Coder
Data
Port
Level
B
Level
A
p
ut
a
l
n
d
p
er
S 2
G
MAY
S
ED
Input
Signal A Input Signal B
OR
PC Lap-Top running
N-Coder/PC software
N-Coder
Crest Audio
Revision 1.03E
NexSys Bus
NC-IPN connections
Power
Processing
Modules

Programmable Gain Input
Vosc Input for Load Monitor
CH A Power Amp
CH B Power Amp
I/F
ckt
ID
ckt
NexSys
Module Bus
Level
Gain
Gain
N-Coder
Data Port
CH A
+
-
G
CH B
+
-
G
Optional
Optional
Atten
Atten
BLOCK
DIAGRAM
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL: [phone] FAX: [phone]
http://www.crestaudio.com
Printed in USA
NC-IPN Input Processing Module
SPECIFICATIONS
Input impedance: 25kΩ
Signal-to-noise ratio: 105dB
Common mode rejection: 100dB
Frequency response: 20Hz-20kHz
Programmable gain range: 0 to -83dB
Voltage gain/input sensitivity: X20 (26 dB),
X40 (32 dB),
or constant sens. for full output at 0dBu (.775V) in
Connectors: Balanced inputs
on barrier strip connector
with 0.325" (8.3mm) screw center
and 0.270" (6.9mm) lug space,
RJ-14 (‘RJ-11 6-pin’) N-Coder data port
Controls: 2 gain attenuators (w/removable knobs)
v. 2.1 4/7/97
Crest Audio reserves the right to make improvements in manufacturing or design which may affect specification. Crest Audio specification literature is available in electronic form to qualified users.
Contact Crest Audio Inc. for more information. NexSys is a registered trademark of Crest Audio Inc. ©1996 Crest Audio Inc.
*A3300024*
CONTROL OPTIONS
The following NC-IPN parameters can be con-
trolled by the hand-held N-Coder, N-Coder/PC
software, or via NexSys software.
N-Coder:
Channel A & B attenuation, phase reverse
N-Coder/PC software:
Channel A & B attenuation, phase reverse, muting
NexSys computer control:
Channel A & B attenuation, phase reverse, solo,
muting, input and output VU metering