Studio Technologies Gen II - Manual (Page 16)

Issue 3, July 1991 Generation II User Guide
Page 18 Studio Technologies, Inc.
Expander Transient Response
1) Adjust the generator level to give 0dBu
when measured at test point AUDIO 1.
Set the generator to the tone burst
mode: two cycles on, 64 cycles off. In
this way, two cycles of audio pass to the
Generation II, then 64 cycles of no
audio, etc.
2) Observe AUDIO 3 on the oscilloscope.
Adjust R34 to give the flattest base
band signal. The signal should not over
or under shoot.
Gain Variation Trim Potentiometer
1) Set the audio generator frequency to
1kHz; adjust its output level to give
–
10dBu when measured at test point
AUDIO 1.
2) Adjust R98, Gain Variation Adjust, to
give
–
10dBu when measured at the
output (pin B) of the Network Module.
It is easier to measure this signal at
the clockwise connection of the stereo
intensity controls.
Specifications
Mounting
One space in a standard 19-inch (48.3cm) rack
AC Mains Requirements
115Vac or 230Vac, 10%, switch selectable,
50/60Hz, 10 watts
Fuse
0.5A for 115V, 0.25A for 230V; units shipped to
North America and Japan contain 0.5A 3AG type;
all others shipped with 0.25A 5x20mm type
Connectors
Input: 3-pin XLR-type female, pin 2 high
Outputs: 3-pin XLR-type male, pin 2 high
Input
Electronically balanced, direct coupled, load termi-
nation resistor optional
Input Level
0, +4, or +8dBu, switch selectable
Input Level Adjust
Approximately ±0.75dB
Input Impedance
25k ohms, nominal
Input Common Mode Rejection
100dB @ DC and 60Hz, 70dB @ 20kHz, 62dB @
40kHz (typical)
Output
Electronically balanced, direct coupled
Output Level
0, +4, or +8dBu, switch selectable
Output Level at Clipping (0dBu = 0.7746V)
+25dBu into 600 ohms, balanced
Frequency Response
Better than ±0.1dB, 20Hz to 20kHz (no simulation
added)
Signal to Noise Ratio (Simulator In Circuit)
76dB
Distortion (THD + Noise, 20Hz to 20kHz)
Simulator In Circuit: less than 0.40%