565E
20
Specifications
Architects and Engineers Specifications
Specifications Chapter 10
In the interest of continuous product improvement, Symetrix, Inc.
reserves the right to alter, change, or modify these specifications
without prior notice.
©1998, Symetrix, Inc. All rights reserved.
The Compressor/Limiter/Expander shall be a dual
channel model that controls the dynamic range of
wide range, wideband audio signals, providing
compression, peak limiting, and downward
expansion simultaneously. The unit shall occupy
one rack space (1U).
The threshold of the compressor section shall be
adjustable over a range of -40 dBu to +20 dBu via
a front panel control. The input-to-output ratio
will be adjustable from 1:1 to 10:1. Control of the
compressor release time shall be set by the front
panel release control. The compressor section
will have a dedicated eight segment LED ladder
that will display the gain reduction amount.
The Compressor/Limiter/Expander shall contain
an integral peak limiter having a 20:1 ratio and
adjustable threshold level. A four segment LED
display shall be provided to indicate the amount
of peak limiter activity.
A front panel switch, with LED indicator, shall
select between dual mono and stereo master/
slave operation. Each channel shall have a
bypass switch which defeats all front panel
controls for that channel.
The Compressor/Limiter/Expander shall also
contain a downward expander having a 1:1.5
expansion ratio with threshold, and release time
controls. A four segment LED display shall be
provided to indicate the amount of downward
expansion.
The inputs shall be active balanced bridging
designs terminated with 3-pin XLR (AES/IEC
standard wiring), and ¼" TRS jack. The input
circuitry shall incorporate RFI filters. The outputs
shall be active balanced designs having equal
source impedances and terminated with
3-pin XLR (AES/IEC standard wiring), and ¼"
TRS jack.
The balanced inputs shall accommodate +20 dBu
signals without distortion, and the balanced
outputs shall be capable of delivering +22 dBm
into a 600-ohm load.
Overall frequency response shall be 10 Hz to 60
kHz (+0 dB, -3 dB). THD+N shall be less than
0.02% measured under the following conditions:
+4 dBu input, +4 dBu output, BYPASS switch
out, 20 Hz to 20 kHz, 30 kHz low-pass filter, 0 dB
gain reduction. Residual noise output shall be no
greater than -90 dBu, measured with a 20 kHz
noise bandwidth, input terminated in 600 ohms.
Access to each channel’s sidechain shall be
provided via a single ¼" TRS female connector.
The ring connection shall be the sidechain
output and the tip connection shall be the
sidechain return.
The unit shall be capable of operating by means
of its own built-in power supply connected to
117V nominal AC (105 to 130V) 50/60 Hz (230V
nominal, 207 to 253V AC, 50 Hz where appli-
cable).
The unit shall be a Symetrix, Inc. model 565E Dual
Compressor/Limiter/Expander.
Input/Output
Maximum Input Level +20 dBu Balanced
Maximum Output Level +22 dBu Balanced
+18 dBu Unbalanced
Input Impedance 20k Ohms Balanced, 10k Ohms Unbalanced
Output Impedance 200 Ohms Balanced, 100 Ohms Unbalanced
CMRR Greater than 40 dB
Performance Data
Frequency Response 10 Hz to 60 kHz +0, -3 dB
Dynamic Range 115 dB (difference of max output and noise floor)
THD+Noise <.02%, +4 dBu in, +4 dBu out, 0 dB gain reduction,
20 Hz to 20 kHz, 30 kHz low-pass filter
System Gain Control ±20 dB center detent
Output Noise -90 dBu measured at balanced output,
input terminated in 600 Ohms, 20 kHz rolloff in analyzer
Crosstalk -95 dB 1k, -95 @ 10k, +4 dBu in,
remaining channel terminated in 600 Ohms,
20 kHz rolloff in analyzer
Sidechain 500 Ohms source impedance,
10k Ohms input impedance, TRS jack, tip is return
Compressor
Type RMS responding
Attack Time 2 mS
Release Time 180 mS to 2.5 S
Threshold -40 dBu to +20 dBu
Ratio 1:1 to 10:1
Limiter
Attack Time 100 µS
Release Time 100 mS
Threshold -12 dBu to +22 dBu
Ratio 20:1
Expander
Attack Time 4 mS
Release Time 250 mS to 5 S
Threshold +10 dBu to -40 dBu (true bypass)
Ratio 1:1.5
Connections
Input XLR, ¼" TRS
Output XLR, ¼" TRS
Sidechain ¼" TRS (one per channel)
Polarity pin 2 of XLR is hot, tip of TRS jack is hot
Physical
Size (hwd) 1.72 x 19 x 8 in., 4.37 x 48.26 x 20.32 cm.
Shipping Weight 8 lbs
Electrical
Power Requirements 120V AC nominal, 60 Hz, 15 watts
220V AC nominal, 50 Hz, 15 watts
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