Magenta MultiView AK500 C7 Quick Reference Manual - page 11
11
CHAPTER 4: Troubleshooting
9
Problem: Serial communication doesn’t work correctly.
Solution: • Are the serial devices connected properly? Are the serial
parameters correct for source/destination devices?
• Are the serial cables terminated correctly? If a null-modem
cable is used, it must be placed at the receiver end.
• When using RS-232 transmitters or receivers in daisy chains,
Catx switches, Catx distribution amps, or Multi-output
transmitters, the serial signal is a unidirectionally broadcast
mode only. In this mode, all other MultiView™ devices must
be the simplex serial type.
For assistance, contact Technical Support.
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 Video System 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: 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
AK500 C7 can only daisy chain within 500 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 500 ft an
AK500 C7 can be daisy chained into an AK1200 which allows for
daisy chaining to 1,200 ft, however the AK1200 is not rated for
Cat7 use, so video quality may be compromised.
•
If using L/R summed audio, simplex serial, or SPDIF units a
maximum of 12 units may be daisy changed within the rated
cable length of the receiver.
•
When using SA units, a maximum of 4 units may be daisy
chained within the rated cable length of the receiver.
•
When using SAP units, a maximum of 12 units may be daisy
chained within the rated cable length of the receiver if using
standard cat5/6 or a maximum of 8 units may be daisy chained
within the rated cable length of the receiver if using skew-free
cable.