16 | P a g e
are the same as default.
8VSB
B-64 (Default)
Frequency plan: NTSC-AIR
Frequency plan: NTSC-CATV
Modulation mode: ATSC-8VSB
Modulation mode: QAM_B_64
B-256
Frequency plan: NTSC-CATV
Modulation mode: QAM_B_256
4.
Troubleshooting
1.
Vertical lines in picture with motion
ANS: change Video source to 720P or 1080P
2.
Unable to find modulated channel
ANS: Confirm CABLE or Antenna is set on TV & HDM1
SOL. Scan TV channels
SOL. Confirm CW Signal is disabled
3.
No picture or channel found at TV
Verify the HDTV has a QAM (digital cable) tuner.
Verify that you have performed a full channel scan on the HDTV with “cable mode” selected. Lower
the power on the unit, then verify that the modulator is not conflicting with any other channel by
connecting the unit directly to the HDTV w/o cable
Image
Breakup
SOL
. Video break up is often caused by an issue in the RF signal. You may have chosen a channel
number that is not open or has a signal from another product or Attenuator is too high
SOL
. If you are combining with other modulators, be sure the channel number selected on the
modulator does not conflict with any other channels, keep in mind that some analog modulators
may need 2 channel spacing causing interference. Change major and minor channel ex: 2 and 5
SOL
. If you are combining with a cable service, keep in mind that they sometimes have extra signals
that a TV will not display and can cause interference.
Test by unplugging cable tv.
SOL
. There may also be an RF power balance issue. Verify that the RF db power of the unit is
balanced with signals from other modulators and from the cable company. As a test, try removing all
other signals (cable, other modulators, etc.) and see if you still see similar issues.
SOL
. Some TVs will also show video issues if the signal strength is too high. Try lowering the RF
power with Attenuation setting to ensure you are not overdriving the HDTV tuner.
SOL
. Change PID video & audio setting, rescan channel
SOL. Change video bit rate to lower level: 5000
SAMSUNG TV PROBLEMS with Stability SOL. Change PID Clock to 74800. Watch for 30 minutes
before considering it good.