MCi JH-400B Series Technical Manual page 8

2.0
DESCRIPTION
The JH-400B Series Console is an IN-LINE console with all of the
circuits needed for one complete MIKE CHANNEL and one complete
REMIX CHANNEL in each I/O module. Therefore the number of input/
output channels is completely flexible. Any number of I/0 modules--
up to the maximum for each frame--may be operated in any console.
If additional channels are needed, they may be added by simply
plugging in new I/0 modules.
A proprietary Op-Amp, custom designed for optimum Audio performance
is used throughout the console. In critical stages this Op~Amp
drives a complementary pair of transistors in an output configur-
ation which produces a complete Audio amplifier with very low
impedance, low distortion, unusually good transient response and
high drive capability.
This proprietary Op-Arnp allows all of the internal circuits in
the JH-400B consoles to operate at OdBv instead of the usual -6dBv.
Its larger voltage swing allows more headroom than most consoles
in spite of the higher program level. With a program level 6db
above the usual level, the signal-to-noise ratio is improved and
the RF rejection on all summing buses is improved by 6db.
The JH-400B Series Consoles are supplied in two frame sizes--
the JH-428B and the JH-440B.
(Dimensions are shown in the Specification
Section.)
The JH-428B is wired and tested for up to 28 IiJPUT/OUTPUT (I/0)
modules with five Console Control modules:
1.
A C01'11'1UNICATION module.
2. A MASTER module.
3. A CONTROL ROG.r-1 HONITOR module.
4. A STUDIO MONITOR module.
5: A STATUS module.
The JH-440B Console is wired and tested for up to 40 I/0 modules
with the same complement of Console Control modules.
2.1 STAimARD FEATURES
Standard features for all JH-400B Series Consoles include:
1. Twenty-four output buses are provided.
2. Five Echo Return circuits are provided. Four of these
circuits have full quad panning, and the fifth has full
channel assignment capabilities.
3. Three Console Programming buttons are provided, which
switch all I/0 modules into BIKE mode, TAPE mode, or
REMIX mode.
JH-400B
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