Extron Electronics HDMI 201 - Manual (Page 32)

Troubleshooting
HDMI signals run at a very high frequency and are especially susceptible to bad video
connections, too many adapters, or cables that are too long. To avoid the loss of an image
or introduction of image jitter, follow these guidelines:
• The HDMI cable on the input to the transmitter or the output of the receiver should
not exceed 10 feet (3 m).
• Use only cable designed for HDMI signals.
• Limit or avoid the use of adapters or patch points between the transmitter and receiver.
• If the display exhibits a flashing black or blue screen, snow, or other distortion, a non-
HDCP compliant display may be receiving an HDCP-encrypted signal.
Check for an HDCP problem by ejecting the DVD from the player. If the display
distortion stops and the DVD menu or screen saver image is clear, the problem is
HDCP-related.
• If image artifacts are present, the TP cable may be the cause. Extron recommends
DTP26 cable.
• The HDMI 201 works as described in point-to-point applications. Do not use any
additional adapters, patch panels, or couplers with the input HDMI cables, output
HDMI cables, and twisted pair cables. Additional links in the signal chain can result in
the reduction of signal integrity and overall cable length performance.
Application Examples
Audio Conversion
Figure 28 shows a standard installation with HDMI video and an audio input. The
HDMI 201 A D Tx converts the video input into two proprietary TP outputs. The Tx
outputs the audio directly on a captive screw connector.
POWER 12V
0.4A MAX
1 2
HDMI OUTPUT RS-232 PASS THRU
Tx Rx
HDMI 201 Rx
INPUT
RS-232
PASS THRU
AUDIO-R
HDMI
AUDIO-L
PO
WER
12V 0.4A MAX
DO NOT
CONNECT
TO LAN
1
2
O
U
T
P
U
T
S
HDMI 201 A D Tx
L
A UDIO OUTPUT
R
Rx
Tx
HDMI In
Source
Audio
TP1
TP2
Balanced Audio Out
Balanced Audio
Wiring
Audio System
HDMI 201 A D Tx Front
HDMI 201 A D Tx Rear
HDMI 201 Rx
Projector
R+
R-
L+
L-
Figure 28. Typical Installation
HDMI 201 • Installation and Operation 28