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Things to watch for:
Herringbone interference on ChannelPlus channel (diagonal lines)
Herringbone interference on many channels (disappears when you
remove the modulator)
...
You may have chosen a channel number that is not completely vacant.
Distant UHF stations may be un-watchable, but will cause interference if
you try to try to create a new channel at the same frequency. Also, cable
companies often have extra signals where there should be none. Try
moving the ChannelPlus channel to another number. You may have to add
a low passfilter to removecable company noise.
… The high output of the ChannelPlus modulator
can overdrive many RF amplifiers. Reduce the RF output using an
attenuator. (ChannelPlus coax panels are designed to take the full output
of these modulators.)
No color on ChannelPlus channels … You may have chosen the
incorrect cable standard. Not all televisions can accommodate the
1.25MHz frequency difference between the H and I cable standards.
No picture
Weak ChannelPlus UHF channel
Audio volume is low
… Verify that the video source is on and is producing a video
signal. Check that the TV and the modulator aretuned to the same channel.
For example, if the modulator is broadcasting on UHF channel 16, make
sure the TV is on UHF 16 rather than CATV 16. UHF 16 and CATV 16 are at
different frequencies.
… If the TV has a separate UHF input,
be sure thatit is connected.
… The left and right audio inputs are combined for
monaural. For properaudio level, both right and left inputs must be used. If
you have a mono source, connect it to both right and left inputs using an
RCA ‘Y’ connector.
See
the section onprogramming.
Sample System Diagram
SATELLITE
RECEIVER
Video/audio out
CATV/Antenna
In this system, CATV or antenna channels
are available on all TVs. In addition the
following channel has been added:
Channel 70 - Satellite receiver
RG6 coax
Model 3308 Coax panel
(Distributes to as many as 8 TVs)
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VIDEO
OUTPUT