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Appendix
Jumper Connector Positions for Cage Extension
Examples of jumper connector settings are shown below.
Note: If the system is smaller than 1 024 inputs times 128 outputs, the settings (factory default settings) may not
need to be changed for extensions.
Crosspoint output for 1 channel
VIDEO IN
2
1
75 Ω
VIDEO OUT
Termination for 75 Ω input and 150 Ω output
VIDEO IN
2
1
75 Ω
VIDEO OUT
Hi-Z input
VIDEO IN
2
1
75 Ω
VIDEO OUT
Termination for 150 Ω input
32
Jumper post on the board
4
6
10
3
5
7
150 Ω
150 Ω
6
8
3
5
7
9
150 Ω
150 Ω
4
6
10
3
5
7
9
150 Ω
150 Ω
Initial-stage cage: (example MXSW 1-3, 2-3, 3-3
S2
and 4-3)
• This stage has a configuration that enables it to
accept an extended video input in the form of an
input terminated at 75 Ω. Actually, however, this
external input terminal is invalid.
• When an input of this cage is selected, S of this
cage is turned on and S of other cages is turned off.
S
• In order to secure 75 Ω for signal send-out from the
initial stage, a 150 Ω termination is provided for the
75 Ω impedance drive and another 150 Ω termina-
tion is provided at the final stage.
Middle-stage cage: Other than the initial and
S2
final stages
• When an input of this cage is selected, S of this
cage is turned on and S of other cages is turned off.
• A wired loop-through system is used for the com-
mon output video bus of the cage. Therefore, a fail-
ure of the power supply to the middle-stage cage
would not cause any problem in the successive
S
stages.
Note: If the video input is 768 or more, this middle-
stage cage may need further extension.
Final-stage cage: (example MXSW 1-1, 2-1, 3-1
S2
and 4-1)
• The selected output of all crosspoint inputs obtained
at the final stage is generated from the VIDEO OUT
terminal of this cage and can be applied to a video
monitor.
• S of this cage is turned on at all times. S2 is used for
the changeover between the crosspoint input of this
S
cage and that of other cages.
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