Studio Technologies 770 - Specifications; General Specifications; Mixer Section Specifications; Output Specifications

Model 770 User Guide Issue 1, October 1997
Studio Technologies, Inc. Page 41
Model 770
Specifications
General
Connectors:
Mic/Line: 3-pin XLR-type, female (pin 2 high)
Outputs  Main 4, AUX 2, IFB Line, and IFB
Talent Amplifier: 3-pin XLR-type, male (pin 2
high for main 4, AUX 2, and IFB line)
All Other Audio: ¼-inch 3-conductor phone jacks
Telco Interface: 6-position modular jack
(RJ11-type)
AC Mains: 3-blade IEC-type
AC Mains Requirement:
100, 120, or 220/240V, ±10%, factory configured;
50/60Hz; 40 watts maximum
Mains Fusing: 1
Type: 5x20mm, fast acting
Rating: 0.4A for 100 or 120V mains, 0.2A for 220/
240V mains
Dimensions (Overall):
19.00 inches wide (48.3cm)
3.49 inches high (8.9cm)
9.50 inches deep (21.4cm)
Mounting:
2 standard rack spaces
Weight:
13.5.0 pounds (6.1kg)
Mixer Section
General Audio Parameters:
Frequency Response: 20Hz-20kHz, ±0.2dB,
mic in/main out 1
Distortion (THD+N): 0.04%, measured at 1kHz,
+4dBu input to mic in/main out 1
S/N Ratio: 85dB, referenced to +4dBu to mic in/
main out 1
Mic/Line Inputs: 3
Type: balanced, transformer-coupled
Impedance: mic 1.6k ohms, line 15k ohms
Common Mode Rejection Ratio: 62dB @ 60Hz
(typical)
Level Range:
Mic: 70 to 10dBu; Line: 30 to +30dBu
Range specified to give +4dBu output level,
master level controls set to unity gain position
Low-Cut Filter: 3dB at 85Hz, 18dB/octave slope
Status LED: bi-color, signal present/peak
Stereo Line Inputs: 2
Type: electronically balanced, direct-coupled,
compatible with balanced or unbalanced signals
Impedance: 24k ohms
Common Mode Rejection Ratio: 80dB @ 60Hz,
70dB @ 40kHz, typical
Nominal Level: +4dBu (8 to +10dBu
acceptable)
Main Audio Bus Limiter/Compressor:
Type: single-knee, VCA-controlled
Slope: 5:1, nominal
Threshold: +10dBu, nominal (6dB above
nominal output level)
Attack Time: 2mSec, nominal
Release Time: 100mSec, nominal
Status LED: limiter/compressor active
Outputs  Main 1, 2, 3, AUX 1:
Type: electronically balanced, capacitor-coupled,
intended to drive balanced or unbalanced loads
of 600 ohms or greater
Source Impedance: 50 ohms, nominal
Nominal Level: +4dBu
Maximum Level: +27dBu into 10k ohms,
+26dBu into 600 ohms
Main Output 4, AUX Output 2:
Type: balanced, transformer-coupled, intended to
drive balanced or unbalanced loads of 2k ohms
or greater
Source Impedance: 170 ohms, nominal
Nominal Level: +4dBu
Maximum Level: +21dBu into 10k ohms