MCi JH-400B Series Technical Manual page 11

--- 3.0
OPERATION
I
' -
The quickest way to become familiar with the operation of the
JH-400B Series Console is to study the FLOW CHART on page 3-7.
This chart shows the FUNCTIONS performed in each module, and
their relationship to each other. Switching, interconnections,
etc. are shown in simplified form. Functions ONLY are shown.
Programming controls for THREE MODES OF OPERATION are supplied
on the STATUS module. When these buttons are pressed, all I/O
modules are switched into one of the three modes. To understand
the three modes, it is necessary to follow the signal flow when
the appropriate relays are activated.
3.1
MIKE f'.10DE
1 ' -
Neither HONITOR relays nor
REtUX
relays are activated for this mode.
From the
~UKE
input, the signal flows through the Mike preamp to
the CHANNEL FADER, then through the EQ circuits. The CHANNEL BUS
assignment switches come next.
(Including the direct assign switch and a
feed to the ECHO switch.)
Each I/0 module contains ONE CHANNEL ACN which is the outout amplifier
for the
CH.&~NEL
BUS having the same number as the I/0 module. In
addition to feeding the TAPE MACHINE OUTPUT, this amplifier also
feeds the
~10NITOR
circuits.
(Through the MONITOR relay contacts.)
The MONITOR amplifiers distribute the signal to the CUE SENDS, the
ECHO SENDS, and the QUAD MIX BUSES
(via the PANNING controls).
In this
mode~
the meters read the output of the CHANNEL ACN
(which
is the TAPE MACHINE INPUT level).
MIKE mode is used for setting up a taping session. Assignment of
channels, recording levels, monitor adjustments, cue send adjustments,
and echo send adjustments can all be made in this mode.
The recording can be made in either HIKE mode or in TAPE mode.
3, 2
TAPE ~10DE
In this mode, the MONITOR relays are activated. REHIX relays are
not activated.
The Signal flow from the .HIKE input through the CHANNEL FADER, the
EQ circuits and the CHANNEL BUS assignment switches is the same as
it was in HIKE mode. The CHAnNEL ACN feeds the TAPE MACHINE output.
JH-400B
Page 3-1