Extron electronic Ultra Series - Manual (Page 35)

2-13 CrossPoint / MAV Matrix Switchers • Installation
Sync termination switches (CrossPoint)
c
Sync termination switches — The RGB (CrossPoint) matrix switchers have
input Sync termination switches on the rear panel (figure 2-16) that provide a
way to condition non-TTL sync levels greater than 5 Vp-p. Sync termination
enables the sync to be properly passed from input to selected output(s).
The matrix switchers have two sets of sync termination switches; one for
horizontal or combined sync and a second set for vertical sync.
The CrossPoint 450 Plus matrix switchers have Sync termination switches for
inputs 1 through 8.
The CrossPoint Ultra matrix switchers have Sync termination switches for
inputs 1 through 4.
CrossPoint Ultra
816, 168, 1212, and 1616
CrossPoint Ultra
84, 88, 124, and 128
H SYNC V SYNC
V V
15
16
15
16
1 4 2 3 1 4 2 3
O U T P U T S O U T P U T S
I N P U T S I N P U T S
SYNC V SYNC
H
HV 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
CrossPoint 450 Plus
2412, 2424, 3216, and 3232
Figure 2-16 — Sync termination switches
Each switch provides the option of selecting either 510 ohms or 75 ohms.
The 75 ohms position is required only for an input with non-TTL sync, greater
than 5 V p-p. The normal position is 510 ohms.
N An input that produces an out of sync display, a display that is rolling vertically
and/or tearing horizontally, could indicate a non-TTL sync input.
A device that is known to output non-TTL sync levels (greater than 5V p-p)
should be connected to one of the inputs with sync termination switches, and the
switches for that input should be set to the 75 ohm position. If you are not sure,
check the specifications in the user’s manual for the input device.