28
2
4
6
8
10
1
3
5
7
9
75
Ω
75
Ω
Clamping
Circuit
VIDEO IN
VIDEO OUT
2
4
6
8
10
1
3
5
7
9
75
Ω
75
Ω
Clamping
Circuit
VIDEO IN
VIDEO OUT
2
4
6
8
10
1
3
5
7
9
75
Ω
75
Ω
Clamping
Circuit
VIDEO IN
VIDEO OUT
Hi-Z input, Wired through, Clamp on
Hi-Z input, Wired through, Clamp on
Hi-Z input, Wired through, Clamp on
Crosspoint input for 1 channel
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
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.
Middle-stage cage:
• Position the jumper connectors as for the initial
stage cage.
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.
●
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.
