Rane CP 31 User Manual

DATA SHEET

General Description

The CP 31 is a single-page, single-zone stereo or dual­mono commercial preamplifier for the small restaurant,
lounge, retail boutique, small office or manufacturing facility.
System designers now have three choices in Commercial
Processors from Rane to fulfill their paging needs – the CP 31
and its bigger brothers the CP 52 & CP 64.

The CP 31 provides Page Ducking for its single stereo
Program Input. One stereo or two completely independent
mono Zones are served. The Page signal can be independently
assigned to either of the two Outputs.

The Paging Input section includes a balanced Euroblock
Input connector, Mic/Line switch, Trim control, ganged/
switchable High/Low Cut Filters (fixed at 100 Hz & 7 kHz),
gating with adjustable Detect Threshold, Active and Overload
LEDs, Page Assign (Off, A, B or Both) and independent Page
Levels for the two Outputs, A & B. The Page signal is
summed “post-zone level” as shipped from the factory, so
Paging levels remain independent of the Zone Output Level.

CP 31

COMMERCIAL PROCESSOR

Internal Paging Pre/Post Zone Level switches allow the
Paging signal to be summed pre-Zone Level for mic/line
mixing.

The Program Input section includes a stereo RCA (unbal-

anced) Input, Mono switch, and Level trims.

The Zone Output section features adjustable Ducker
Depth with an On/Off switch independent for each program
input. The Zone Outputs have independent front panel Level
controls and 3 segment level meters.

The Expand output allows Page or mono Program signals
to feed an additional location or device for system expansion.
The Expand Output has its own rear panel Level trim.

The CP 31 is the least complex and least expensive of
Rane’s Paging products which include the CP 52 and CP 64.
The CP 31 is also perfect for zone expansion of Rane CP­based systems. Simply connect the CP 52 or CP 64 Page or
Program Expand Outputs to a CP 31 to add an extra Zone
(with its own page, program, both or neither).

Gated Paging Circuit Features

• Mic/Line Selection with Gain Trim

• High and Low Cut Filter Switch

• Adjustable Detector Threshold with Active LED

• Independent Paging Level Controls

Zone Output Features

• Level Control

• Ducker On/Off with Depth Control

Special Features

• Page Initiated Program Ducking

• Page/Program Expansion with Level Control

• UL/CSA/CE and 100/120/230 VAC Remote Power Supplies

Data Sheet-1

CP 31

COMMERCIAL PROCESSOR

Features and Specifications

Parameter Specification Limit Units Conditions/Comments

MIC/LINE PAGING INPUT

..........Input Type Balanced Instrumentation amplifier

..........RFI Filter Yes

..........Gain Range +30 to +60 2 dB Continuously adjustable

..........Frequency Response 30 to 40k typ Hz Maximum gain, +0, -3 dB

..........Input Referred Noise -125 1 dBu Gain: 60 dB, Rs:150 ohms, BW: 20 kHz

..........CMRR 40 min dB 20 Hz to 20 kHz

..........THD+N 0.05 0.01 % Gain: 30 dB, +4 dBu out, 1 kHz, BW: 80 kHz

..........“Mic” Input Impedance 500 1% ohms Each leg to ground

..........Line Pad 30 1 dB

..........“Line” Input Impedance 14.5k 1% ohms Each leg to ground

..........Signal Detector Range -

..........Signal Detector Attack 10 typ msec Fixed; 10 dB overdrive

..........Signal Detector Release 3 typ sec Fixed

..........Overload Detector +16 1 dBu 4 dB before clipping

..........Low Cut / Hi Cut Filters 100 & 7k 5% Hz Selectable In/Out

PROGRAM INPUT

..........Input Type Unbalanced RCA connector

..........Input Level Adjust Off to 0 dB

..........Frequency Response 10 to 50k typ Hz +0, -3 dB

..........Input Impedance 10k 1% ohms

OUTPUTS

..........Type Balanced Euroblock connector

..........Zone Out Gain: Program In 12 1 dB

...............From Page Inputs 6 1 dB

..........Expand Out Gain 6 1 dB From Page or Program Input

..........Frequency Response 10 to 50k typ Hz +0, -3 dB

..........S/N 90 min dBr re +4 dBu; BW: 20 Hz-20 kHz

..........THD+N 0.05 0.01 % +4 dBu, 1 kHz, BW: 80 kHz

..........Crosstalk -80 max dB 1 kHz, Rs: 25 ohms, (L/R)

..........Output Impedance 100 1% ohms Each leg

..........Maximum Output 24 typ dBu Load: 2k ohms

..........Peak Meter -10, +4, +16 ±2 dBu Peak reponse

..........Ducker: Depth Range 50 to 6 typ dB Continuously adjustable



(on) to +4 typ dBu Continuously adjustable

Stereo

Exposure to modulated RF and electromagnetic fields as specified in CE EMC standard EN55103-2 results in worst case

THD+N of 0.34% (quasi-peak, A-weighted, 22-22k Hz) with a signal level of +4 dBu @ 1k Hz.

Data Sheet-2