.
9
Problem: “
Green shift” or “green washout” on multimedia signals.
Solution:
The standard video/serial model is designed to function with DC
coupled signals in which the black level is referenced to 0 volts.
Nearly all VGA cards function this way.
Some media servers, however, provide AC coupled signals and
can cause a green color shift in the video. This is a result of the
sync clamping on the red and blue channels of the video/serial
model.
For five-component (RGB/H&V) AC coupled video, the
MultiView CAT5 XRTx Universal transmitter has been designed
with full DC restoration capability. This problem is easily solved
via a simple switch setting in the XRTx Transmitter. Please refer to
the XRTx Transmitter user manual.
Problem:
Image has purple/blue tint
Solution:
Display gain may need adjustment. Older displays may have an
incorrect gain adjustment setting. This requires using the remote to
access the “expert mode” . Please contact NEC technical support or
Magenta Research for assistance in this.
Displays purchased after May 2009 should not require this.
Problem: Notes on Daisy Chaining:
Solution:
When daisy chaining, the maximum cable distance is not increased
beyond the rated distance of the receiver used. For example, an
AK600 can only daisy chain within 600 ft of the transmitter.
It is possible to daisy chain out of a short range receiver into a longer
range receiver to increase the range. For example, over 600 ft an
AK600 can be daisy chained into an AK1200 which allows for daisy
chaining to 1,200 ft.
•
When using NEC600 SAP units, a maximum of 10 units may be
daisy chained within the rated cable length of the receiver if
using standard CAT5/6 or a maximum of 7 units may be daisy
chained within the rated cable length of the receiver if using
skew-free cable.
•
Note that if SA/SAP units are used for video only and the SA/
SAP option is
not
in use, then you may daisy chain to 12 units.
