8
TIME-DIVISION MULTIPLEXOR
3. Setup and Installation
3.1 Installation
Set switches to match the required configurations as described in
Sections 3.2
through
3.5
. The cabling between each device and the Time-Division Multiplexor
must be terminated with male connectors. Character length and stop-bit reduction
only apply to channel 1 when it is selected for asynchronous operation.
3.2 Character Length
SW1 positions 1 and 2 select the character length. The character length includes
the start, stop, and any parity bits. 10-bit length is 1 start bit, 8 data bits, and 1 stop
bit.
Figure 3-1
outlines all the available character bit lengths available.
3.3 Stop-Bit Reduction
SW1 position 3 selects the percentage of stop-bit reduction to occur when the sync
rate is faster than the async rate. Setting SW1 position 3 to ON will select 25% stop-
bit reduction. Setting SW1 position 3 to OFF will select 12.5% stop-bit reduction.
3.4 Channel 1 Sync/Async
SW1 position 5 selects channel 1 as a sync or async channel. This selection must be
the same on both ends of the circuit for the units to operate correctly. Setting SW1
position 5 to ON will select asynchronous operation on channel 1. Setting SW1
position 5 to OFF will select synchronous operation on channel 1.
3.5 Equipment Grounding
SW1 position 6 connects Pin #1 (Chassis Ground) to Pin #7 (Signal Ground).
3.6 Factory Straps
SW1 position 4 is not used. It must be in the OFF position. Jumpers JP1 through
JP3 must be installed for proper operation.
