User guide
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.