Wheatstone TV-80, Technical Manual

Page: 32 / 120

M O N O M I C / L I N E I N P U T
page 2 – 8
TV80 / Sep 98
Input Module Control Ports
The MI-80 input module has two control ports: one for micro-
phone sources (“MIC LOGIC”), the other for line sources (“MA-
CHINE CONTROL”). Each has its own DB-9 connector mounted
on the module’s rear panel.
Control functions are input specific; that is, programming jump-
ers on the module’s switch PCB (SISW-80) activate them for Line
1 and/or Line 2, and programming jumpers on the module’s main
PCB activate them for Mic 1 and/or Mic 2.
EXAMPLE: A logic enable jumper for L2 has been installed (but not
one for L1). When L2 is selected at the top of the module, and the module’s
Channel ON switch is pressed, then control functions will take place for any
source machine hooked up to the Line 1/2 Logic DB-9 connector. However,
if L1 is preselected and the channel is turned ON, nothing will take place at
the source machine wired to the control connector.
Generally speaking, input port control jumpers (zero ohm resistors) are
already installed at the factory as required by client specifications, however,
should you wish to install your own, see jumpers J4 thru J7, Technical
Drawings “MI-80 Switch Card” load sheet (page 18, lower right) and
“SISW-80 Schematic” (page 17, D3):
Mic 1 – J7
Mic 2 – J6
Line 1 – J5
Line 2 – J4
MIC LOGIC DB-9 connector Functions (for Mic Sources):
To Turn the Module ON & OFF from a Remote Location
REMOTE ON – Activates the module’s CHANNEL ON switch.
Provide a momentary closure between pins 1 and 7. This will latch the
module ON. (User-supplied momentary contact switch required.)
REMOTE OFF – De-activates the module’s CHANNEL ON
switch. Provide a momentary closure between pins 1 and 9. This will
latch the module OFF. (User-supplied momentary contact switch
required.)
COUGH (Momentary OFF) – Provide a closure between pin 3 and
pin 1. This will turn the module OFF. Note this is a non-latching mode;
the module will turn on again as soon as the closure stops. (User-
supplied momentary contact switch required.)
Talkback to Control Room (TB to CR)
Lets talent at a remote location talk to the console operator instead
of having his mic signal go out “live”. In this case a user-supplied
momentary action TALKBACK switch is required for the remote
microphone, where a closure between pins 1 and 2 does two things: (a)
the module’s PFL signal is placed on the console’s CUE bus (where it
may be heard by the console operator) and (b) the module’s COUGH
function is simultaneously activated, to prevent the TB signal from
going out over other assigned busses (i.e., “live”). This non-latching
condition continues until the external TB switch is released.
The module’s MIC LOGIC
and MACHINE CTRL DB-9
connectors are located at the
bottom of the rear panel
Refer to the pintout diagrams
on page 2-12 in conjunction
with the text of this section.
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MACHINE CTRL
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