Allen & Heath CDM48 Datasheet

Allen & Heath Limited

www.allen

-

heath.com

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Word Clock

MADE IN CHINAENGINEERED IN THE UK BY ALLEN & HEATH LIMITED

AC MAINS IN ~
100-240V~ 50/60Hz 88W
FUSE T2.5A L 250V 20mm

AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR.

SERIAL No:

WARNING: THIS APPLIANCE MUST BE
CONNECTED TO A MAINS SOCKET OUTLET
WITH A PROTECTIVE EARTHING CONNECTION.
ATTENTION: CET APPAREIL DOIT ETRE
RACCORDE A UNE PRISE ELECTRIQUE
SECURISEE RELIEE A LA TERRE

Laite on liitettävä suojamaadoituskoskettimilla
varustettuun pistorasiaan.
Apparatet må tilkoples jordet stikkontakt.
Apparaten skall anslutas till jordat uttag.
Apparatets stikprop skal tilsluttes en stikkontakt
med jord, som giver forbindelse til
stikproppens jord.

This device complies with part 15 of the FCC
rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful
interference, and
(2) this device must accept any interference
received, including interference that may cause
undesired operation.
CAN ICES-3 (B)/NMB-3 (B)

Caution: For continued protection against risk
of fire replace fuse with same type and rating.
Attention: Remplacer par un fusible strictement
identique en valeurs.

Kernick Industrial Estate
Penryn, Cornwall,
TR10 9LU, UK

Overview

CDM48 Technical Datasheet

 48 mic/line inputs, 24 line outputs
 XCVI 160x64 FPGA core

o 96kHz sample rate
o Variable bit-depth for ultimate precision

and noise performance

o Virtually infinite mix headroom thanks to

96bit accumulator

o Class leading, ultra-low latency 0.7ms

 128 Input Channels with full processing
 64 Mix Outputs with full processing
 Configurable 64 bus architecture (group, FX,

aux, matrix, mains)

o LR, LCR and up to 5.1 mains mode
o Multiple PFLs

 16 RackExtra FX with dedicated stereo returns
 Automatic Mic Mixer (AMM) up to 4 zones, 64 ch

 DEEP processing – powerful embedded plugins

including GEQ and compressor modelling

 24 DCAs
 Built-in signal generator, RTA and spectrogram
 New preamp design for extra transparency
 Unique Active PAD circuit for consistent

performance with any source

 Connection hub

o 1 x GigaACE gigabit link to MixRack
o 2 x DX link for I/O expansion
o 1 x I/O Ports – 128 ch 96 kHz
o Dedicated ME-1 48kHz port
o 2 x Network ports
o Wordclock BNC I/O

 Flush front panel with ultra-quiet fan
 Reversible rack ears design

Dimensions

433.00

308.40

24.20

481.60

314.20

310.00

CDM48 - without box

Width - 481.6mm/19"
Depth - 309mm/12.2"
Height - 310mm/12.2"/7U
Weight - 12kg/26.4lbs

CDM48 - with box

Width - 600mm/23.7"
Depth - 430mm/17"
Height - 470mm/18.5"
Weight - 14.5kg/32lbs

304.20

370.00

A&E Specifications

The mixer shall be a 7U rack-mountable device capable of stand-alone operation,
with or without a control surface. It shall be capable of 128 input channels, 64 mix
busses, and over 400 soft-patchable system inputs and outputs, all independently
assigned. There shall be 16 stereo rack FX engines with dedicated stereo returns,
and 24 DCAs. The rack unit shall contain the mix engine. This mix engine shall run
at 96kHz sampling rate and employ FPGA technology for digital signal processing.
The system latency from analogue input to output shall not exceed 0.7ms.

The mixer shall provide 48 XLR inputs of high quality and capable of handling
microphone or line signals and shall have remote controlled analogue gain
adjustable in 1dB steps, a 20 dB PAD, and phantom power. All input channels shall
be configurable mono/stereo and have access to any hardware input on the unit, or
remote input via expansion options. Mix busses shall be configurable as any
combination of mono/stereo auxiliary sends, groups, mains, FX sends or matrices.
All output channels shall be routable to any of the 24 XLR line outputs on the unit,
or remote output via expansion options. All input channels shall contain the
following processing: Trim, Polarity, High Pass Filter, Low Pass Filter, two Insert
points, Gate, Parametric EQ, Compressor, Delay. All output mix channels shall
contain the following processing: External input, Trim, Polarity, Insert, Parametric
EQ, Graphic EQ, Compressor, Delay. The channel processing shall also provide
high quality emulations of classic compressors and GEQs. These emulations shall
be insertable on the fly on any channel without using the internal FX and without
the need of external plug-ins or licenses.

16 user-assignable effect racks shall be provided with a library of factory preset FX
emulations. The FX racks shall be individually configurable as send/return from a
channel or FX/Mix, or inserted into input or output channels. The mixing system
shall provide the options of FX racks processed signals to be returned to other
mixes via dedicated FX input channels with PEQ, assigned as sources to input
channels, daisy-chained to another FX rack by internal patching, or routed to an
output socket or interface channel. A global source option for input channel direct
outs shall be provided in the routing screen. The tap-off point can be adjusted to
the following positions in the processing path: post Preamp, post HPF, post Gate,
post Insert return, post PEQ, post Compressor, and post Delay. There shall be
further global options for Follow Fader, and Follow Mute.

The mixer shall provide Automatic Mic Mixing (AMM) of up to 64 microphone
sources into 1, 2 or 4 zones. The AMM shall be capable of running in classic gain
sharing mode or optionally as a NOM (Number of Open Microphones) algorithm.

54.20

218.80

A single 128-channel I/O port for an optional digital interface module shall also be
provided. Optional interface modules shall include: MADI, EtherSound, Dante,
Waves SoundGrid, and ACE.

An Ethercon port shall be provided for connection to the control surface via the
Allen & Heath gigaACE protocol. This connection shall carry over 300x300
channels of uncompressed audio at 96kHz, control data and tunnelling of third party
Ethernet traffic. An Ethercon port shall also be provided for I/O expansion, carrying
up to 32x32 channels of uncompressed audio at 96kHz. A range of optional
expansion racks shall be provided and shall include fixed format and modular racks
with analogue or digital I/O. A further Ethercon port shall be provided for connection
to the Allen & Heath ME personal mixing system. This connection shall carry 40
channels of uncompressed audio at 48kHz with built-in sample rate conversion, and
channel naming.

A BNC connector shall be provided on the unit for Wordclock input and output. A
pair of RJ45 sockets shall be provided for gigabit Ethernet network connections to
laptops or other control systems. A headphone output shall also be provided.

The unit shall have a fixed power supply accepting AC mains voltages of 100~240V,
50/60 Hz, 175W max via an earthed 3-pin IEC male connector. A rocker switch
shall be provided near the mains inlet to isolate the mixer from the incoming mains
supply. The rack ears shall be provided with the unit and reversible so that either
face of the unit can be presented on the front of the rack or flight case.

The mixer shall provide the facility to save 500 scenes. The scenes shall be name­able and a descriptive text entry per scene provided. A comprehensive table of
Scene Safes shall be provided to prevent selected items from being changed from
their state when the safe was enabled. A comprehensive scene filter shall be
provided per scene to Allow / Block each parameter saved in a scene from being
changed as that scene is recalled. A Cue List of scenes shall be provided to
facilitate a running order of scenes from the master list. A crossfade of up to 20
seconds shall be adjustable per scene. Scene recall may be embedded into a scene
with the option to delay the start of the embedded scene recall by up to 4 minutes.

An option shall be provided for password protection for log-in of several users with
different levels of system access and permissions. A particular scene may be
chosen to be recalled per change of user-login if desired.

CDM48 Datasheet 2 Allen & Heath Ltd

The mixer shall be the Allen & Heath dLive CDM48.

Block Diagram

dLive SYSTEM BLOCK DIAGRAM

Firmware V1.6

PAD

+

-

-20dB

Audio interface

option card

128 Inputs

PAD

+

-

-20dB

Audio interface

option card

128 Inputs

PAD

+

-

-20dB

28-band 1/3 octave

GEQ

Sidechain

POL

0

POL

0

PEQ

Post-PEQ

48V

GAIN

ADC

SRC

Bypass

48V

GAIN

ADC

48V

GAIN

ADC

SRC

Bypass

Post-GEQ

COMP

Sidechain

28-band 1/3 octave

GEQ

MIC/LINE inputs

dLive
Surface

AES3 inputs

PP

USB

WAV Stereo Playback

I/O Port/s

MIC/LINE inputs

dLive
MixRack

PP

I/O Port/s

MIC/LINE inputs

dLive
Expanders

<32 inputs

GRP AUX FX

AES3 inputs

MAIN

PAFL

MTX

PP

MIX MASTER (GRP, AUX, MAIN)

Post-Trim

Post-PEQ

Post-Insert

INSERT

PEQ

+

EXT IN - Patch from:

Configuration:

64 x Bus = GRP, AUX, FX, MTX, MAIN
Configurable Mono / Stereo

EXT IN - Patch from:

Skt, I/O Port
or RackFX

Skt, I/O Port
or RackFX

Post-Trim

TRIM

TRIM

INSERT

+

Post-Insert

PFL/AFL MONITOR

EXT Input to PAFL
Skt or I/O Port

INPUT

PATCH

MixRack inputs

Surface inputs

I/O Port inputs

Expander inputs

RackFX outputs

USB Playback

Sig Gen

Mix outputs

PFL

Post-Comp

DELAY

MATRIX MASTER

Configure as MONO or STEREO

COMP

Post-Comp

Post-GEQ

DELAY

INPUT CHANNEL x 128

Configurable Mono / Stereo

WIDTH

TRIM

MODE

Stereo ch
only

Source option

per AUX mix

Global meter
source option

Global Direct Out

source option

MUTE

Dyn8 x64

Dynamic EQ

Multiband comp

DCA

FADER

MUTE

MUTE

DELAY

RTA

31-band 1/3 octave

128 input channels x 64 bus Mix Engine

Sidechain

INSERT A

GATE/

Ducker

PFL
AFL

From:
FX Send
or
Any MIX
Input DIR OUT

POL

0

Post-Preamp

FX SEND

Strip METER

FADER

DEEP

FILTERS

preamp

AMM key

TALKBACK

IP or

Global meter
source option

Post-Fader

FADER

BAL

(Main LR only)

Mix Output

R

L

GRP to MAIN

R

L

R

L

GRP to AUX/MTX

Post
Pre

LEV

L

R

AUX/MAIN to MTX

Post
Pre

LEV

PFL

MTX Output

Global meter
source option

AFL not affected by Trim

0dB

AFL

DCA

Post-Fader

-24dB
PFL TRIM

Post-Ins A

RackFX x16

Send > Return FX

Inserted FX

HPF

PFL
AFL

PEQ

Post-PEQ

Patch to:
FX Return

or
Input Channel
IP or MIX INSERT
Output Patch

Assign to: GRP

Press to TALK

Sidechain

COMP/
Ducker

AUX
MAIN
MATRIX

Strip METER

MUTE

Strip METER

MUTE

INSERT B

OUTPUT

PATCH

Input DIR OUT

GRP/AUX/MAIN

MixRack inputs

Surface inputs

I/O Port inputs

PAFL monitor

Wedge monitor

IEM monitor

RackFX 1-8 out

MATRIX

FADER

FADER

DELAY

METER

PEQ

Sine (Sweep 20-20kHz)
White Noise
Pink NoiseMIX Insert
Bandpass Noise (Sweep)

IEM

WEDGE

METER

AMM

gain

Post-Delay

FX RETURN x16

MUTE

dLive
Surface

dLive
MixRack

dLive
Expanders

<32 Outputs

FADER

DCA

SIG GEN

MUTE

DCA

MUTE

FADER

ASSIGN+PAN

L

L
Post
Pre

LEV

LEV

96kHz WAV Stereo Record

DAC

DAC

R

R

Ret to AUX/FX

To: GRP

DAC

SRC

Bypass

Audio interface

option card
128 Outputs

DAC

Audio interface

option card
128 Outputs

DAC

SRC

Bypass

ASSIGN+PAN

L

L

TRIM

PFL
AFL

in-place

Ret to MAIN

Ret to GRP

AUX
MAIN
MATRIX

BAL

+

-

44.1/48/96kHz

PHONES

BAL

+

-

PHONES

BAL

+

-

44.1/48/96kHz

Assignable buses

MAIN

GRP AUX FX

MTX

PAFL

PFL
AFL

IP to MAIN

R

IP to GRP

R

IP to AUX/FX

LEV

DIRECT OUT

Line Outputs

Ready

+4dBu

AES3 Outputs

USB

I/O Port/s

Line Outputs

Ready

+4dBu

Monitor
1-40

I/O Port/s

Line Outputs

Ready

+4dBu

AES3 Outputs

CDM48 Datasheet 3 Allen & Heath Ltd

Technical Specifications

and Weights

12.2

"x 12.2

") x 12

kg (

26.5

lbs)

16.9

"x 18.5

") x 14.5kg (32

lbs)

Inputs

Mic/Line XLR
Inputs

Mic/Line Preamp Fully recallable Dynamic Range 110dB

Input Sensitivity -60 to +15dBu System Signal to

Analogue Gain +5 to +60dB, 1dB steps

Pad -20dB Active PAD

Maximum Input
Level

Input Impedance >4kΩ (Pad out), >10kΩ (Pad in) Internal operating

Mic EIN -127dB with 150Ω source dBFS Alignment

Phantom Power
indication

Outputs

Analogue XLR
Outputs

Output Impedance <75Ω ADC 24-bit Delta-Sigma

Nominal Output +4dBu = 0dB meter reading DAC 24-bit Delta-Sigma

Maximum Output
Level

Residual Output
Noise

-90dBu (muted, 20-40kHz) + 5 samples, Surface to Mixrack

+ 8 samples, DX32 to Mixrack

Dimensions

Balanced XLR, +48V phantom
power

+30dBu (PAD in) Headroom +18dB

Per socket, internal or external
phantom power sensing,
triggered at 24V

Balanced, Relay protected Sampling Rate 96kHz +/- 20 PPM

+22dBu

-92dBu (muted, 20-20kHz) Latency

System

Measured balanced XLR in to XLR out, 20-20kHz,
minimum Gain, Pad out, signal @ 0dB (meter)

Noise

Frequency
Response

THD+N (analogue in
to out)

Level

Meter Calibration 0dB meter = -18dBFS (+4dBu at

Meter Peak
indication

-92dB

20Hz - 30kHz +0/-0.8dB

0.0015% @ +16dBu output,
1kHz 0dB gain

0dBu

+18dBu = 0dBFS (+22dBu at
XLR output)

XLR out)

-3dBFS (+19dBu at XLR out)

0.7 ms (MixRack XLR in to XLR
out, Input to Mix)

(GigaACE hop)

(DX hop)

CDM48 Datasheet 4 Allen & Heath Ltd

Width x Depth x Height x Weight Operating

CDM48

CDM48 - boxed 600 x 430 x 470 mm (23.6"x

481.6 x 309 x 310 mm 7U (19"x

Temperature Range

Mains Power
(MPS16)

0 deg C to 35 deg C (32 deg F
to 95 deg F)

100-240V AC, 50-60Hz, 175W
max