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Jumper Connector Positions for Cage Extension
When the input video signal is terminated at another unit and it need be received at a Hi-Z impedance, position jumper
connectors on the board to the position shown below.
Crosspoint input for 1 channel
VIDEO IN
VIDEO OUT
Hi-Z input, Wired through, Clamp on
VIDEO IN
VIDEO OUT
Hi-Z input, Wired through, Clamp on
VIDEO IN
VIDEO OUT
Hi-Z input, Wired through, Clamp on
28
2
4
6
8
10
1
3
5
7
9
75 Ω
2
4
6
8
10
1
3
5
7
9
75 Ω
2
4
6
8
10
1
3
5
7
9
75 Ω
Initial-stage cage:
• Video input is received at the input circuit terminat-
ed at a high impedance.
• Wire the through circuit to be used for transferring
75 Ω
the same input signal to another cage.
• The signal output is clamped before sending it out
to the board circuit to adjust the black level to that of
another input signal.
Clamping
Circuit
Middle-stage cage:
• Position the jumper connectors as for the initial
stage cage.
75 Ω
Clamping
Circuit
Final-stage cage:
• Position the jumper connectors as for the initial-
stage cage.
• When the jumper connectors are in this position,
there is no 75 Ω drive for VIDEO OUT. If output is
required at 75 Ω termination, change jumper posi-
tions 1-2 and 3-4 to 1-3.
75 Ω
Clamping
Circuit
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