Below are some common uses for the AT-ETU-SYNC
No video from cisco cable box:
The AT-ETU-SYNC can be used to resolve clock stretching issues when not being able to get the video to pass from a Cisco/Scientific Atlanta cable box. One simply has to install the ETU-SYNC directly on the output of the affected cable box which will re-clock the image from the cable box.
No video on a display when using various AV equipment in between source and TV:
Since the more layers an AV system has between the source and display, the more chances there are for EDID information to be changed or infringed. The AT-ETU-SYNC can be used to record the EDID off the display and bring this EDID information to the source that’s passing video. This will help ensure a more stable picture/audio signal and optimal system performance. For information on how to learn EDID on an ETU-SYNC, please see this article.
No video or HDCP message on DVI Monitor:
Whenever using a DVI monitor (with an HDMI to DVI cable), it’s possible that the display may not support specific HDCP functions which may prevent some sources from working on these displays. The AT-ETU-SYNC can be used to analyze the signal path to see if the display has issues with HDCP. You can install the AT-ETU-SYNC directly between your source and the DVI display, then press the TEST button to verify HDCP format of the display. You may also test the source
Solid Green = Sink (display) is HDCP 2.2 compliant
Flashing Green = Sink is HDCP 1.4 (will not support HDCP 2.2 content)
Solid Red = Sink is not HDCP-compliant
Unable to get video from a source when going into a video conferencing system:
Due to the fact that video conferencing systems do not allow for HDCP content to be passed through them, it’s possible that sending an HDMI signal with HDCP encryption will not pass. The AT-ETU-SYNC can be used to analyze the signal being passed from the source to the display to confirm if there is HDCP signals passing. Press the TEST button on the ETU-SYNC and look at the HDCP lights. The source light will be used for this test. The AT-ETU-SYNC cannot be used to strip away HDCP content.
Solid green = Source is HDCP 2.2 compatible and passing HDCP signal
Flashing green = Source is HDCP 1.4 and passing HDCP signal
Solid Red = Source is not HDCP-compliant. This means the source is not passing HDCP signal.
Not getting video from a specific source:
Any HDMI source that is passing signal needs to be passing 5 volt with the video/audio information. A loss of this signal will cause video/audio playback issues. The AT-ETU-SYNC can be used to analyze the signal from a source to confirm if adequate 5V current exists. After installing the AT-ETU-SYNC between the source and the display, press the TEST button on the ETU-SYNC to see if the 5V light illuminates. If there is a 5V issue, leaving the ETU-SYNC installed will correct the problem.
Solid red = 5V signal from the source is not detected (source may have an issue with passing 5V)
Solid green = 5V signal from the source is present (5V is correctly passing)
Off (no light) = No source device is detected. Check that source is connected and turned on. Check HDMI cable from source.
No video on a specific display:
Any HDMI display is looking for Hot Plug Detect (HPD) when a source is connected to it to confirm if they are being sent a signal. If a display is not receiving the proper HPD, it will prevent it from coming out of stand-by and playing back video. The AT-ETU-SYNC can be used to analyze the HPD signal from the source to confirm if it’s being passed. To test this, press the TEST button on the ETU-SYNC and look at the HPD light. If there is an HPD issue, leaving the ETU-SYNC installed will correct the problem.
Solid red = HPD is low. The AT-ETU-SYNC will generate the signal if left installed between the source and display.
Off = No sink device is detected. Check that the sink device is connected. Verify the integrity of the HDMI cable connected to the sink (display).
Article ID: KB01102