Magenta Research MultiView II AK1200DP Installation And User Manual - page 22
Troubleshooting
MultiView™ II AK600DP/AK1200DP
Installation and User Guide
18
Problem
Solution
Serial
communication
doesn’t work
correctly
Are the serial devices connected properly? Are the serial parameters correct
for source/destination devices?
Are the serial cables terminated correctly? Is a null-modem cable required at
the TX or RX end?
When using RS-232 capable receivers with video switches, distribution amps,
or multi-output transmitters, the serial data is sent transmit-only. Please take
this into account when trying to control displays or other devices.
For
assistance, contact Magenta Technical Support
.
SA units have no configuration settings. They work from 50 to 9600 baud
automatically, and use 3 wire (TX, RX, GND) signals only.
SAP units have a factory default baud rate of 9600 bps and use 3 wire (TX,
RX, GND) signals only. If necessary, use SAP-II serial commands to change
the baud rate to match your connected device.
“
Green shift” or
“green washout” on
multimedia signals
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 PC 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-II XRTx
transmitter has been designed with full DC restoration capability. This problem is
easily solved via a configuration setting in the transmitter. Please refer to the
appropriate transmitter user manual.
Notes on daisy
chaining
When utilizing a receiver’s RJ45 daisy chain port, the following rules apply:
•
If using L+R summed audio (-A), simplex serial (-S), or (-A) in SPDIF mode, 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
low-skew cable.
•
When daisy chaining, the maximum cable distance is not increased beyond the
rated distance of the receiver used. For example, an MVII-AK600DP can only
daisy chain within 600ft 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 MVII-AK600DP can be daisy chained into an MVII-
AK1200DP, which allows for daisy chaining to 1,200 ft.