Audio Specifications; General Specifications - Peavey MediaMatrix CAB 8i Mode D'emploi

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 ª :
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
2
CONTROL SPECIFICATIONS
CobraNet ª 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