Operating instructions

A-3System 7SC • Appendix
Input level ..................................... 0.5V to 5V p-p
Output level.................................. 0.5V to 5V p-p
Input impedance .......................... 510 ohms
Output impedance ...................... 75 ohms
Max input voltage ....................... 5V p-p
Max. propagation delay.............. 20 nS
Polarity .......................................... Positive or negative (follows input)
Audio
Gain ............................................... Unbalanced/balanced -15dB (min.) to +9dB (max.) adjustable per channel in
0.5dB increments
Frequency response..................... 20 Hz to 20 kHz, ±0.05dB
THD + Noise ................................ < 0.03% @ 1 kHz at rated maximum output drive
S/N ................................................ > 90dB at rated maximum output drive (+21dBu)
Crosstalk ....................................... < -80dB @ 1 kHz, fully loaded
Stereo channel separation .......... > 90dB @ 1 kHz
CMRR ............................................ > 75dB @ 20 Hz to 20 kHz
Audio input
Number/signal type ................... 6 stereo, balanced/unbalanced (rear panel)
1 stereo, unbalanced (front panel)
Connectors .................................... 6 3.5 mm captive screw connectors, 5 pole, and
1 3.5 mm mini stereo jack (unbalanced), or
2 RCA female (white = L, red = R)
Impedance .................................... >12.5 kohms balanced, 25 kohms unbalanced, DC coupled
Maximum level ............................ +19.5dBu, (balanced or unbalanced) at stated %THD+N
Input gain adjustment................. –15dB to +9dB, adjustable per input via RS-232 or front panel
Audio output
Number/signal type ................... 2 line-level stereo, balanced/unbalanced
Connectors .................................... 2 3.5 mm captive screw connectors, 5 pole
Gain ............................................... +0dBu unbalanced, +6dBu balanced
Impedance .................................... 50 ohms unbalanced, 100 ohms balanced
Attenuation
Fixed output ..................... 0%
Variable output ................ 0% to 100%
Maximum level (Hi-Z) ................ > +21dBu, balanced or unbalanced at stated %THD+N
Maximum level (600 ohm) ......... > +15dBm, balanced or unbalanced at stated %THD+N
0dBu = 0.775 volts (RMS).
Control/remote — switcher
Serial control port ........................ RS-232, 9-pin female D connector, dual port
Baud rate and protocol ............... 9600, 8-bit, 1 stop bit, no parity
Serial control pin configurations 2 = TX, 3 = RX, 5 = GND
Contact closure ............................ 1 3.5 mm, 10-pole captive screw connector
Contact closure pin configurations 1 = input 1; 2 = input 2; 3 = input 3; ... ; 7 = input 7;
8, 9, 10 = GND
IR controller module ................... 30 kHz to 60 kHz input frequency compatibility
Program control ........................... Extron’s control program for Windows
Extron’s Simple Instruction Set™ – SIS™