S T E R E O L I N E I N P U T
page 3 – 4
A-5000 / Nov 98
Local/Ready
The module’s channel OFF switch normally has its LED indicator
controlled by the switch itself (“local”). This is the factory default setting.
However, should you wish to have the LED function as a “ready” light for
an external source machine, dipswitch SW4 position 2, when thrown to the
left (away from the faceplate) passes control to opto-isolated A and B
“ready” ports on the module’s lower DB-25 connector, where a simple
closure will activate the OFF switch LED. As long as the closure is
maintained, the LED will be lit.
Tallies
Turning the module ON can activate a remote tally indicator. There are
three tally control lines: on-air, tally 2 and tally 3. The first three positions
of dipswitch SW5 (to the left of the fader) program these functions:
SW5 position 1 activates the on-air tally control line
SW5 position 2 activates tally 2
SW5 position 3 activates tally 3
Remote ON/OFF — Constant vs. Pulse
Slide switch SW1, located just to the right of the main PCB’s upper
card fingers, allows you to correct for differing source machine ON/OFF
control signals to the SL-5000 module. When set to CONST (“up”), the
module will work with most standard source machines. Occasionally,
however, the source machine, because of the way it is designed, will send
overly long control closures to the module’s remote ON and OFF ports—
closures so long that they will hang up the module’s ON/OFF logic. When
this kind of problem manifests itself, setting SW1 to PULSE (“down”) will
convert the closures to pulses before they get to the channel ON/OFF
switch logic.
Example: SW1 is set to default CONST (constant). The external source
machine reaches end-of-play and sends a five second (or longer) OFF signal to
the module, effectively holding it in an Off state. You press the module ON
switch but nothing happens—because the OFF switch is locked up. With SW7
set to PULSE this type of problem is eliminated; the module is turned off and
left immediately ready for further control input.
Remote START/STOP
Whenever the channel ON switch is pressed a single pulse closure
takes place at the A or B START ports. When the OFF switch is
subsequently pressed, a single pulse closure takes place at the A or B STOP
ports.
Remote tallies are
hooked-up to the console
at the Control Room and
Studio modules (see
pages 5-4 and 6-4).
The factory default set-
ting for SW1 is PULSE
(down)
