Symetrix 551E, Руководство пользователя

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551E
552E
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Specifications for the 551E
Technical Specifications
Chassis Size 1.72"H x 19" W x 8.25" D
4.37cm H x 48.26cm W x 20.955cm D
Shipping Weight 8 lbs, 3.64 kg
AC Requirements via internal supply
117V AC, nominal, 95-130V AC, 50-60 Hz
230V AC, nominal, 165-255V AA , 50 Hz
Power Consumption 15 watts, maximum
In the interest of continuous product improvement, Symetrix, Inc.
reserves the right to alter, change, or modify these specifications
without prior notice.
Copyright, 1998, Symetrix, Inc. All rights reserved.
The parametric equalizer (EQ) shall be a single
channel unit that shall provide five indepen-
dent filter bands. There shall also be separate
high-pass and low-pass filters. The unit shall
occupy one rack space (1U).
Each filter band shall have the following
controls and control ranges: a cut/boost
control with a -20 dB to +12 dB range, a
frequency sweep control with a 100 Hz - 2kHz
range, a frequency range multiplier switch with
X10, X1, and X0.1 settings, and a bandwidth
control with a .05 octave - 2.0 octave range.
There shall also be a 12 dB/Oct high-pass filter
with a user-adjustable cutoff frequency range
of 6Hz to 260 Hz, and a 12 dB/Oct low-pass
filter with a cutoff frequency range from 3kHz to
65 kHz. A front panel input level control shall
provide ±15 dB of gain adjustment.
When the unit is inoperative (either by loss of
power or via the BYPASS switch), the inputs
and outputs will be wired together by a relay.
The frequency response with all filter bands
flat, EQ in, high-pass and low-pass set to the
outside extremes of their ranges, shall be 20Hz
to 62 kHz (-0.5dB, -3dB). The total harmonic
distortion plus noise shall be less than 0.002%
(EQ in, all bands flat). The dynamic range shall
Architects and Engineers Specifications
Chapter 9
Maximum Input Level +21 dBu balanced
Maximum Output Level +21 dBu balanced
+17 dBu unbalanced
THD+Noise (1kHz at +4dBu) <0.002%
(<10 Hz to 30 kHz measurement bw)
-eq in, all bands flat
Signal to Noise Ratio >96 dB (unweighted, ref to +4dBu)
-eq in, all bands flat
Dynamic Range >114 dB
Frequency Response -0.5 dB, -3dB (20 Hz - 62 kHz)
Input Impedance 20k ohms balanced, 10k ohms unbal.
Output Impedance 300 ohms balanced, 150 ohms unbal.
EQ band Control Specs:
Frequency Control Range
10 Hz - 20 kHz (inc. Frequency Switch)
Cut/Boost Range -20 dB, +12dB
Bandwidth .05 oct - 2.0 oct
be greater than 114 dB. The EQ shall accept a
maximum input signal of +21 dBu and have a
maximum output level of +21 dBu. There shall
be a front panel clip indicator that will illumi-
nate at 1dB below clipping. It shall monitor the
input, output and each EQ band.
The inputs shall be direct-coupled, active
balanced designs terminated with 3-pin XLR
(AES/IEC standard wiring), and ¼" TRS female
connectors. The input circuitry shall incorpo-
rate RFI filters. There shall be a servo-
balanced, direct-coupled output that shall
terminate in 3-pin XLR (AES/IEC standard
wiring) and ¼" TRS connectors.
The EQ shall be capable of operating by
means of its built-in power supply connected
to 117V nominal AC, 105-130V, 50-60 Hz (230V
nominal AC, 207-253V, 50 Hz where appli-
cable). Power consumption shall be 15 watts
maximum. There shall be a rear panel recep-
tacle for an IEC-type detachable power cord.
The EQ shall be UL and CE approved.
The unit shall be a Symetrix, Inc. model 551E
Five Band Parametric Equalizer.