Crest Audio NC-IPE - TECHNICAL Instruction manual

Features:
• NexSys-compatible gain control with priority external page
• Programmable precision attenuation when used in conjunction with the hand-held N-Coder or N-Coder/PC software
• Balanced input barrier strip connectors • Removable gain pot knobs for security
• 5mm 2-pin Phoenix connector for page-enable • 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.
• Jumper-selectable NO/NC relay
NC-IPE Programmable Input with Priority Page
Product Information
The NC-IPE 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 for level changes
and provision for external switching to a line level page input signal.
A DC voltage ranging from +5 to +24 VDC (at 40mA) will enable a
relay which will switch in the external paging signal. Internal jumpers in
the module can be used to set whether the page input is enabled when
power is applied or enabled when power is removed (allowing the use of
normally open or normally closed switches to control the page function).
In conjunction with the hand-held N-Coder or N-Coder/PC software, the
NC-IPE can also function as a precision attenuator in NexSys®and non-
NexSys controlled 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-IPE 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-IPE.
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. A page input barrier
strip, line level feed shall be activated by the page enable relay. This in turn shall be activated
via a contact closure providing +5 to +24 VDC at the page enable connector.
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/programmed
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-IPE.
INPUT PROCESSING MODULE
FOR CKS, CKV & CKX SERIES
POWER PROCESSING AMPLIFIERS
Model
NC-STI
q
uential
u
rn-On Output
A
B
+
+
–
–Signal
Ground
Lift
Jumper
CLASS 2
WIRING MAY
BE USED
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
78
9
5
2
0
1
346
10
78
9
5
2
0
1
346
10
Page
Enable
+–
+–
N-Coder
Data
Port
Page Signal
Input
Signal A Input
Signal B
NexSys Bus
Model
NC-IPE
++
Input A Input B
–
–
Level
B
Level
A
Page Input
N-Coder
Crest Audio
Revision 1.03E
OR
PC Lap-Top running
N-Coder/PC software
NC-IPE connections
Power
Processing
Modules

Programmable Input with Priority Page
Vosc Input for Load Monitor
CH A Power Amp
CH B Power Amp
Level
Gain
Gain
Page
Input
CH A
In
+
-
G
Atten
Atten
CH B
In
+
-
G
Page
Enable Relay
BLOCK
DIAGRAM
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL: [phone] FAX: [phone]
http://www.crestaudio.com
Printed in USA
NC-IPE 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 sensitivity for full output at 0dBu (.775V) int
Connectors: Balanced inputs
(Channel A, Channel B, and page)
on barrier strip connector
with 0.325" (8.3mm) screw center,
0.270" (6.9mm) lug space,
5mm 2-pin Phoenix page enable connector,
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.
*A3300023*
CONTROL OPTIONS
The following NC-IPE parameters can be
controlled by the hand-held N-Coder, N-
Coder/PC software, or via NexSys soft-
ware.
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