Trouble Shooting
♦ The video and the audio from video source are not synchronized on TV
Unplug and plug the input port(s) on the Modulator to restore.
♦ My Modulator output video cannot be viewed on TV but other channels can be
• If output channel can be scanned from TV without HDMI/CVBS/SDI source connected, check the
User Guide of input device to ensure high resolution video signal is configured correctly for
modulation.
• If nothing is displayed on TV with or without HDMI source device connected, check all connections
and settings are correct according to the instructions on this Start Guide.
• If a HDMI switch or a hub is used, some of them don’t pass through Extended Display Identification
Data (EDID) to tell the video resolution. Connect the HDMI device directly to the Modulator or TV
without a switch.
• If the HDMI source is from a PC/DVI device (e.g. laptop computer), the Modulator doesn’t support
it. A converter box to convert the DVI video to standard 3D video in 720p or 1080p is required.
♦ Video with fast motion doesn’t play well or shows ghosting on TV
This might be caused by interlacing issue with 1080i resolution on sports or action video.
♦ How to get the best video quality on TV with the Modulator
• Change the resolution of video source to 1080p or 720p (progressive). If TV doesn’t support 1080p,
change the resolution of video source to 720p and enable interlacing.
• If QAM modulation technique is available from the Modulator, change it to 256QAM.
♦ How do I know my TV supports ATSC (8VSB) or J.83B standard
Most recent models of TV set sold in the US within the last three years can support both ATSC (8VSB)
and J.83B standards but if it’s unsure, the broadcasting standard of the TV can be realized by
checking the wiring:
• If the coaxial cable connected to the TV is an outdoor/indoor antenna drop, the TV supports
ATSC (8VSB).
• If the coaxial cable connected to the TV is a Cable TV drop (e.g. from Comcast), the TV supports
J.83B.
♦ Some or most channels are instable or cannot be viewed on TV
The input signal can be too strong for the TV tuner. Increase the RF output attenuation to be higher
than 0dB but less than 30dB.
♦ Audio from HDMI source is skipping or stuttering on TV
If HDMI source device has Compressed Audio or Dolby Digital Sound enabled, try to set it to
traditional Pulse-Code Modulation (PCM) Stereo or Uncompressed Audio output. Double compression
of audio signal may cause audio skipping on TV.
♦ How do I replace an old modulator with MX-100R, MX-200 or MX-300
Refer to the settings of the old modulator and duplicate them, such us Output Frequency, Output
Power Level, Channel Number, Channel Name … etc. on MX-100R, MX-200 or MX-300 as much as
possible before replacing the old modulator.
♦ The Modulator output video stretches or shrinks on TV
MX-100R, MX-200 and MX-300 process input video without alteration in color and aspect ratio.
Check the settings of aspect ratio on video input device and TV to adjust and fix.
♦ The Modulator output video on TV is flickering
Some old TVs expects the MPEG Transport Stream (TS) Video PID value different from PCR PID. Check
the TS Settings of MX-100R, MX-200 or MX-300 and change the PCR PID value to be different from
Video PID value.
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MX-100R, MX-200 and MX-300 HD Modulator
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