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SPECIFICATIONS
(Typical Subject to change without notice.)

Size
Inches (mm) H x W x D
Front Panel: 3.5 x 19 (88.9 x 483)
Chassis: 3.5 x 17 x 14.37 (88.9 x 432 x 365)

Power
95 to 130 VAC, 50/60 Hz, 12 W maximum
190 to 260 VAC option available

Temperature Range
10° to 40°

RF Protection
All inputs and outputs RF suppressed, power supply RF suppressed and shielded from main circuitry.

INPUT/OUTPUT CONNECTIONS

Composite Input
BNC connector, rear panel
"floating" input, 10k W impedance.
Level range at 25 kHz deviation
.085 to .85 VRMS, .24 to 2.4 V P to P.

Calibration Input
BNC connector, rear panel
When CAL position selected, drives M & D inputs.
For use with Gibson calibration tables.1

Audio Outputs
Test outputs
Unbalanced BNC connectors, front and rear panels
Left/Right or Sum/Difference as selected.
<1 W source impedance
minimum load impedance 600W
L or R output at 25 kHz deviation of L + R 7 dBm
Sum output at 25 kHz deviation of L + R 13 dBm
Difference output at 50 kHz deviation of L - R 13 dBm
Balanced line outputs
No. 6 screw terminals, rear panel
Left/Right or Sum/Difference as selected
~100 W source impedance
minimum load impedance 600W
L or R output 25 kHz deviation of L + R 7 dBm
Sum output 25 kHz deviation of L + R 13 dBm
Difference output at 50 kHz deviation of L - R 13 dBm

INDICATORS

Stereo
SRD is receiving a stereo signal.

Mono
SRD is receiving a monaural signal.

Ref level
Green
Input signal is within setup window
Red
Input is above setup window

SEPARATION
(See graphs, page 5)

75 µsecond equivalent mode
Greater than 55 dB 50 Hz to 15 kHz.

BTSC encoded
Greater than 45 dB 50 Hz to 14 kHz.

CONTROLS

Mode Select
Selects among the following output modes:
Equivalent 75 µsecond
Sum & Difference
Left & Right
BTSC
Sum & Difference
Left & Right (normal operation)
Calibrate
Places the M & D inputs in parallel for calibration
to the Gibson tables.

Input
Selects between preset inputs A or B.

A & B Trimmers
Adjusts input composite level to fall within the setup window
for each of the preset inputs.
75 µSecond Deemphasis
Switches the 75 µsecond deemphasis in or out.

FREQUENCY RESPONSE

75 µsecond equivalent mode (L, R, or L + R)
±0.1 dB 50 Hz to 14 kHz
no more than - 1.0 dB at 15 kHz

BTSC encoded (L + R modulation)
Same as above.

BTSC encoded (L or R, 10% M channel modulation)
±0.1 dB 50 Hz to 5 kHz
±0.2 dB 6 kHz to 14 kHz
no more than - 2.0 dB at 15 kHz

TOTAL HARMONIC DISTORTION

75 µsecond equivalent mode
(100% M channel modulation)
0.02% max.

BTSC mode
(70% M channel modulation)
0.15% 50 Hz, 0.07% 100 Hz, 0.04% above 200 Hz.

INPUT SETUP WINDOW WIDTH

0.03 dB

SIGNAL - TO NOISE - RATIO

Equivalent Mode, with 75 µsecond deemphasis
Left channel - 84 dB
Right channel - 84 dB
Main channel greater than 84 dB
All below ± 25 kHz deviation.
L - R subchannel greater than 88 dB
below ± 50 kHz deviation.

BTSC Mode, with 75 µsecond deemphasis
Left channel - 86 dB
Right channel - 86 dB
Main channel greater than 89 dB
All below ± 25 kHz deviation.
L - R subchannel greater than 89 dB
below ± 50 kHz deviation.

1. See Appendix D, Multichannel Television Sound, BTSC Systems Recommended Practices, EIA Television Systems Bulletin No. 5, Engineering Department Electronics Industries Association, July 1985.