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7
SS 8.1 MLR/RJ Installation and Operation Manual
OPERATION
PIP (GPI)/Remote Control Inputs
The SS 8.1 MLR/RJ interfaces to external equipment through removable euro-block
screw terminals. The terminals accommodate wire sizes from 16 - 28 AWG solid or
stranded wire. Before installing a wire, remove the euro-block screw terminal plug
and turn each capture screw fully counterclockwise. Strip each conductor to a length
of 0.25” and insert the conductor fully into the terminal. Turn the capture screw fully
clockwise to secure the conductor.
The SS 8.1 MLR/RJ has eight status inputs that may be configured for PIP (“trig-
gers”) or remote-control operation and accept momentary contact closures (sus-
tained, if break before make); open collector or TTL/CMOS input logic levels.
The PIP/remote control operation mode is set by the SW11-7 dipswitch, when
SW11-7 is OFF the unit is in remote control mode and when SW11-7 in ON the unit
is in PIP mode. The PIP/remote control connections to the switcher are found on the
top rows of the connectors TB6 and TB7. Each channel may be selected by a
momentary contact to ground (DGND) located on the bottom TB7 connector. Each
channel is pulled high (5-volts) through a 22K resistor. For example, pulsing the
“MUTE” input to ground would turn off the output of the SS 8.1 MLR/RJ until a
front panel source switch is pressed, a different remote-control input is activated, the
unit is powered up and/or a serial command is received from a PC or other serial
device.
Pulsing the “STEP” input to ground will step the unit one source for each low to high
transition on this input. Automatic timed sequencing may be accomplished by hold-
ing the step input low. The unit will now step to each source at a user programma-
ble rate from 1 to 99 seconds (10 seconds by default). The last step channel is user
programmable and is set to 8 by default. This feature may be used to sequence
through multiple station air monitor signals for a program on-hold feed.
The SS 8.1 MLR/RJ is also capable of being used for EAS audio insertion. This fea-
ture is enabled by setting the EAS controlled input channel via RS232 to the desired
audio input channel (see the Serial Operation section of this manual for more infor-
mation.) Once an input channel has been designated the SS 8.1 MLR/RJ will auto-
matically switch to that input for the duration of a sustained closure to ground on the
designated PIP/remote control input. When released, the previous selected input
will be activated.
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