Extron Electronics CrossPoint 42 HVA - Manual (Page 23)

3-7 CrossPoint 42 HVA Matrix Switcher • Operation
V R G B H V
INPUTS
R
3
4 2
H V H V
1
ON
2 3 4
H V H V
1
Rear Panel Controls
The CrossPoint 42 HVA has sync termination switches on the rear panel for all
inputs (figure 3-5). The switches provide a way to condition non-TTL sync levels
greater than 5 Vp-p, enabling the sync to be properly passed from input to selected
output(s). The CrossPoint 42 HVA has two sets of sync termination switches; one
for horizontal or combined sync and a second set for vertical sync.
Figure 3-5 — 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
5V p-p. The normal (default) position is 510 ohms.
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.
Input should be set to the 75 ohm position for a device known to output non-
TTL sync levels (greater than 5V p-p). If you’re not sure, check the
specifications in the user’s manual for the input device.