Peavey CAB 8i User manual

Brand: Peavey

Model: CAB 8i

Type: User manual

Description

The CAB

8i and CAB

8o,

respectively, are eight-input and eight-

output MediaMatrix

gateways onto and

off of an Ethernet network for real-time

MediaMatrix

audio distribution and

control. They employ Cobranet proprietary

protocol to ensure seamless, error-free

transmission of high-quality real-time

audio without drop-outs or lossy

compression across a 100baseT Ethernet

network.

The CAB

8i uploads eight channels of

either microphone-level or line-level

analog audio signals onto an Ethernet

network. Each input channel has software

controlled, continuously variable analog

input gain from -9 dB to +60 dB in 1 dB

steps. Each has 48-volt phantom power

and a 20 dB mic/line pad. Both functions

are software switchable.

The CAB 8o downloads eight channels

of line-level analog audio signals from an

Ethernet network. Maximum output levels

are individually jumper-selectable between

+24 dBu, +18 dBu, +12 dBu, and +6 dBu.

In addition to eight input or output audio

paths, both products incorporate eight

voltage-control input ports, eight software

controlled TTL outputs port, eight software

controlled relays with both normally open

and normally closed contacts, an RS-485

port with multi-drop connections, and two

word-clock linking BNC connectors.

Features

¥ Eight channels of either microphone

or line-level audio transmitted onto

an Ethernet network using CobraNet

protocol sampled at 48 kHz (CAB 8i).

¥ Eight channels of line-level audio

transmitted from an Ethernet network

using CobraNet protocol sampled at

48 kHz (CAB 8o).

¥ A/D converters are 24-bit, 64 times

oversampling, using delta-sigma

modulation (CAB 8i).

¥ D/A converters are 24-bit, 128 times

oversampling, using delta-sigma

modulation (CAB 8o).

¥ 48-volt phantom power for microphone

inputs, individually software switchable

on each input channel (CAB 8i).

¥ 24- or 20-bit transmission quantization

at a 48 kHz sampling rate.

¥ Eight channels of analog control voltage

input ports which allow external

switches, potentiometers, or voltage

sources to control MediaMatrix software

parameters via an Ethernet link.

¥ Eight channels of TTL control outputs

ports which are software controllable via

an Ethernet link.

¥ Eight relays, with both normally open

and normally closed contacts, which

allow software control of external

devices via an Ethernet link.

¥ A non-Ethernet RS-485 control port with

two mulit-drop connections.

¥ Two word clock linking connectors that

enable auto-switch-over to a second

unit, should one unit fail.

¥ One rack-unit (1-3/4"), fan-cooled

chassis.

Applications

¥ Stadiums

¥ Cruise ships

¥ Multi-purpose facilities

¥ Auditoriums

¥ Large-scale paging systems

¥ Schools

¥ Courts of law

¥ University campus buildings

¥ Theme parks

¥ Performing arts centers

¥ Distance learning

¥ Hotel meeting rooms

¥ Houses of worship

¥ Conference centers

¥ Teleconferencing

¥ Live sound microphone snakes

¥ Civic centers

¥ Music clubs

¥ Theaters

¥ Arenas

¥ Any facility requiring distribution of

multiple microphone or line-level

signals

SPECIFICATIONS

MediaMatrix

CAB

™

8i and

CAB

™

AUDIO SPECIFICATIONS

Audio Channels:

CAB 8i: Eight input channels, line-level

or microphone level with switchable

48-volt phantom power.

CAB 8o: Eight output channels, line-

level with individual channel jumpers for

a maximum output of +6, +12, +18, or

+24 dBu (factory default is +12 dBu for

unity I/O gain).

Note: See Digital specifications, Audio

Channels per CAB 8i/8o for number of

channels limitations.

Frequency Response:

20 Hz Ð 20 kHz, +0/-0.5 dB, with a

+4 dBu input signal, unity gain in and out.*

Total Harmonic Distortion:

0.01% @ 1 kHz, 0.02% @ 20 kHz, with

a +4 dBu input signal, unity gain in and

out*

Note: Measurements made using a 10

Hz to 30 kHz input filter on Audio

Precision System One for testing.

Dynamic Range:

Mic Level:

Ð123 dBu equivalent input noise with a

150 Ohm, Ð48 dBu input signal, no input

pad, analog input gain at 60 dB, digital

gain at 0 dB, analog output set for

+12 dBu maximum (factory pre-set

jumper for unity gain through-put)

Note: This is equivalent to 78 dBA,

75 dB unweighted.

Line level:

95 dBA, 93 dB unweighted, with a

+12 dBu input signal, unity gain in and out*

Input CMRR (CAB 8i):

Better Than 65 dB at Any Gain

Setting:

73 dB with +12 dBu input and unity gain

in and out*, 69 dB with a +4 dBu input

signal and unity gain in and out*, 68 dB

with a Ð56 dBu input signal, no input

pad, analog input gain at 60 dB, digital

gain at 0 dB, analog output set for

+12 dBu maximum (factory pre-set

jumper for unity gain through-put).

Maximum Input Level (CAB 8i):

+29 dBu, with a 20 dB pad in and the

analog input gain at 0 dB, +38 dBu with

a 20 dB pad in and the analog input gain

at Ð9 dB.

Note: The analog input gain control is

not buffered with an electronically

balanced amplifier and maintains a

balanced input circuit with

1-dB-per-step precision and specified

CMRR.

Maximum Output Level (CAB 8o):

+24 dBu @ 600 ohms

CAB 8i Gain:

Software controlled analog gain from

Ð9d B to +60 dB, adjustable in 1 dB

increments, with a software selectable

analog Mic/Line input switch. (Line level

selection inserts a 20 dB input pad.)

CAB 8o Gain:

Software controlled analog output gain

from Ð95.5 dB to +31.5 dB, adjustable

in 0.5 dB increments with internal analog

output jumpers for maximum output

levels of +6, +12, +18, or +24 dBu

Note: It is not recommended to use this

as a microphone level output as noise

will be a problem at extremely low

output levels.

Input Impedance (CAB 8i):

22.2 k ohms for Line input selection and

2.2 k ohms for Mic input selection

Output Impedance (CAB 8o):

100 Ohms, designed to drive a minimum

load of 600 Ohms

Analog LED Metering:

Eight peak-reading headroom meters,

calibrated in dBu, monitor the analog

level present at the input to the A/D

converters for the CAB 8i, and at the

output of the D/A converters for the CAB

8o, with the top-most red LED indicating

A/D or D/A clipping.

Note: The top-most red LED should

never illuminate during normal operation.

Note 1: Audio specifications are measured

from the input into the CAB 8i and the

output out of the CAB 8o where relevant.

Note 2: All specifications are typical.

*Indicates no input pad, analog input gain

at 0 dB, digital gain at 0 dB, analog output

set for +12 dBu maximum (factory pre-set

jumper for unity gain through-put).

DIGITAL SPECIFICATIONS

A/D and D/A quantization:

24-bit resolution

Audio Transmission Quantization

via CobraNet

Software switchable, 24 or 20-bit resolution

Digital Processing:

24-bit DSPÕs, 56-bit accumulators

Audio Sampling Rate and Clock

Speeds:

48 kHz audio sampling, 80 MHz DSPÕs,

12.288 MHz master clock

Audio Channels Per CAB 8i/8o:

¥ Eight with 20-bit transmission quanti-

zation selected

¥ Seven with 24-bit transmission quanti-

zation selected

CONTROL SPECIFICATIONS

CobraNet

I/O:

100BaseT Ethernet via a standard

eight-conductor RJ-45 jack

RS-485:

One port with two 3-cond. half duplex,

multi-drop connections

Control Ports:

Control voltage in:

0 VDC to +10 VDC, external-

potentiometer or external-voltage-source

controlled (internal 10 VDC supply

provided)

Software controlled TTL (Transistor-

to-Transistor Logic) out:

0 VDC or +5 VDC, with a maximum

current of 28 mA distributed to 8 outputs

Eight Software Controlled Relays

With Both NO and NC Contact:

Maximum contact voltage:

120 VAC or DC

Maximum contact current:

2 A

Word-Clock Ports:

Two BNC I/O ports

Note: Can be used for redundancy

back-up that automaticaly switches from

one CAB 8 to another if the first should

fail.

GENERAL SPECIFICATIONS

Dimensions:

CAB 8i CAB 8o:

1.730" H x 19" W x 11.698" D

(4.39 cm H x 48.26 cm W x 29.71 cm D)

Net Weight:

CAB 8i: 8.5 lbs. (3.86 kg)

CAB 8o: 8.4 lbs. (3.81 kg)

AC Power:

Universal Power Supply:

1.4 A maximum, 100 to 240 VAC, 47

to 63 Hz

Power Consumption and Heat

Generation:

CAB 8i: 25 W, 85 BTU/Hr

CAB 8o: 20 W, 68 BTU/Hr

Maximum In-Rush Current:

CAB 8i and CAB 8o: less than 1.4 Amps

Finish:

Grey powder-coat painted steel

Accessories:

One detachable AC cord, four rubber

adhesive feet

Product Agency Compliance

Listings:

UL, CUL, CE and FCC part 15, A

Frequency Response

T.H.D. versus Frequency

Functional Block Diagram

16.840"

427.736mm

1.080"

27.438mm

11.698"

297.129mm

1.730"

43.942mm

1.730"

43.942mm

19.0"

482.6mm

Mechanical Diagram

ARCHITECTSÕ AND ENGINEERSÕ

SPECIFICATIONS

Audio specifications are measured with

the input fed into the CAB 8i, digitally

transmitted through an Ethernet hub, and

the output fed out of the CAB 8o where

relevant.

CAB 8i:

The Peavey CAB 8i shall provide eight

channels of either microphone or line-level

audio transmitted onto an Ethernet

network. It shall provide full-bandwidth,

high-quality audio transmission via

100BaseT (fast) Ethernet without lossy

compression techniques, drop-outs or

signal degradation by employing CobraNet

audio transmission protocol to make

Ethernet signal distribution deterministic.

It shall employ 24-bit A/D converters with

20- or 24-bit selectable transmission

quantization utilizing a 48 kHz sampling rate.

It shall have a frequency response from

20 Hz to 20 kHz, +0/-0.5 dB or better. Its

total harmonic distortion shall be no more

than 0.01% at 1 kHz and 0.02% at 20 kHz

with a +4 dBu input signal. It shall have a

dynamic range of 95 dBA and 93 dB

unweighted for line-level signals, and an

equivalent input noise level of Ð124 dB for

microphone level signals. Input-common-

mode-rejection ratio (CMRR) shall be

greater than 65 dB at any gain setting.

Maximum input level without clipping shall

be +38 dBu while maintaining specified

CMRR. CAB 8i input gain shall be from

Ð9 dB to +60 dB in 1-dB steps. The CAB

8i input impedance shall be 2.2 k ohms at

microphone level (20 dB pad out), and

22.2 k ohms at line level (20 dB pad in).

Control features shall include eight relays

with both normally open and normally

closed contacts, and eight channels of

TTL control outputs, both of which are

software controllable via an Ethernet link.

Also included are eight channels of analog

voltage-control ports that allow external

switches, potentiometers or voltage

sources to control MediaMatrix software

parameters via an Ethernet link.

Front-panel indicators shall display the

following status conditions: signal

transmission, signal reception,

transmission error, reception error, fault

indication, link indication, conductor

status, RS-485 control indication, and

power presence. It shall have eight peak-

reading headroom meters to monitor the

analog level present at the input to the

A/D converters, with the top-most red LED

indicating A/D clipping.

Rear panel features shall include a

detactable AC power cord, an AC power

switch, and an AC power receptacle with a

built-in auto-resetting circuit breaker.

External or internal fuses shall not be

acceptable. It shall have two word-clock

connectors to enable auto-switch-over

should a unit fail. It shall employ

detachable, euro-style, bare-wire

capturing, screw-terminal connectors for

ease of hook-up and trouble-shooting.

These connectors shall be used for all

line-level, microphone-level, control-

voltage, TTL, relay, and RS-485

connections. The unit shall use a

standard eight-conductor RJ-45 I/O

jack for Ethernet connection.

Its dimensions shall be 19 inches (48.26 cm)

wide, 12 7/8 inches (32.70 cm), and 1 3/4

inches (4.44 cm) high without feet. Its net

weight shall be 8.5 pounds (3.86 kg.), and

its 1 rack-unit (1 3/4"), fan-cooled, steel

chassis, shall be finished in grey powder

coat.

It shall consume no more than 25 Watts of

power and draw no more than 1.4 Amps

of current. It shall be supplied with a

detachable AC cable and four rubber feet.

It shall be UL, CUL, CE listed and comply

with FCC part 15, A. The unit shall be

Peavey Electronics Corporation model

CAB 8i.

CAB 8o:

The Peavey CAB 8o shall provide eight

channels of line-level audio transmitted

from an Ethernet network. It shall provide

full-bandwidth, high-quality audio

transmission via 100BaseT (fast) Ethernet

without lossy compression techniques,

drop-outs or signal degradation by

employing CobraNet audio transmission

protocol to make Ethernet deterministic. It

shall employ 24-bit A/D converters with

20- or 24-bit selectable transmission

quantization utilizing a 48 kHz sampling rate.

It shall have a frequency response from

20 Hz to 20 kHz, +0/-0.5 dB or better. Its

total harmonic distortion shall be no more

than 0.01% at 1 kHz and 0.02% at 20 kHz

with a +4 dBu output signal. It shall have a

dynamic range of 95 dBA and 93 dB

unweighted. Maximum output level shall

be +24 dBu with a load of 600 ohms or

greater. CAB 8o gain shall be from

Ð95.5 dB to +31.5 dB in 0.5 dB steps. The

output impedance of the CAB 8o shall be

100 ohms and designed to drive a load of

600 ohms or greater.

Control features shall include eight relays

with both normally open and normally

closed contacts, and eight channels of

TTL control outputs, both of which are

software controllable via an Ethernet link.

Also included are eight channels of analog

voltage-control ports that allow external

switches potentiometers or voltage

sources to control MediaMatrix software

parameters via an Ethernet link.

Front-panel indicators shall display the

following status conditions: signal

transmission, signal reception,

transmission error, reception error, fault

indication, link indication, conductor

status, RS-485 control indication, and

power presence. It shall have eight peak-

reading headroom meters to monitor the

analog level present at the output of the

D/A converters, with the top-most red LED

indicating D/A clipping.

Rear panel features shall include a

detachable AC power cord, an AC power

switch, and an AC power receptacle with a

built-in auto-resetting circuit breaker.

External or internal fuses shall not be

acceptable. It shall have two word-clock

connectors to enable auto-switch-over

should a unit fail. It shall employ

detachable, euro-style, bare-wire

capturing, screw-terminal connectors for

ease of hook-up and trouble-shooting.

These connectors shall be used for all

line-level, control-voltage, TTL, relay, and

RS-485 connections. The unit shall use a

standard eight-conductor RJ-45 I/O jack

for Ethernet connection.

Its dimensions shall be 19 inches (48.26 cm)

wide, 12 7/8 inches (32.70 cm), and 1 3/4

inches (4.44 cm) high without feet. Its net

weight shall be 8.4 pounds (3.81 kg.), and

its 1 rack-unit (1 3/4"), fan-cooled, steel

chassis, shall be finished in grey powder

coat.

It shall consume no more than 20 Watts of

power and draw no more than 1.4 Amps

of current. It shall be supplied with a

detachable AC cable and four rubber feet.

It shall be UL, CUL, CE listed and comply

with FCC part 15, A. The unit shall be

Peavey Electronics Corp. model CAB 8o.

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3 + 2 YEAR LIMITED WARRANTY

NOTE: For details, refer to the warranty statement. Copies of

this statement may be obtained by contacting

Peavey Electronics Corporation

P.O. Box 2898, Meridian, Mississippi 39301-2898.

Features and specifications subject to change without notice.

Peavey Electronics Corporation • 711 A Street • Meridian • MS • 39301

(601) 483-5376 • FAX (601) 486-1678 • aa.peavey.com

80304547

ARCHITECTURAL ACOUSTICS

Peavey CAB 8i User manual

Brand: Peavey

Model: CAB 8i

Type: User manual

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