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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
5
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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