Things to watch for:
No picture … Verify that the video source is on and is producing a video signal. Check that the TV and the modulator are tuned 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.
Weak ChannelPlus UHF channel … If the TV has a separate UHF input, be sure that it is connected.
LEDs blink ... You need to have one unused channel space between channels. The display will blink if you have made an ‘illegal’ choice. See the section on programming.
Herringbone interference on ChannelPlus channel (diagonal lines) ...
You may have chosen a channel number that is not completely vacant. Distant UHF stations may be
Herringbone interference on many channels (disappears when you remove the modulator) … 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.)
Audio volume seems low compared to broadcast … There may be little you can do here, other than turn up the volume. Here is what is happening:
In broadcast television, the audio is compressed: The soft sounds are amplified to be almost as loud as the loud sounds. The technical measure of this is dynamic range, the ratio of loudest to softest sounds. The dynamic range of video devices such as DVD and LV players is very great. Since most of a typical movie consists of ‘soft’ sounds, the audio will seem quieter than normal television channels. (This is also why commercials, which are the most compressed, seem louder than the program they accompany.)
To appear to be at the same volume as broadcast channels, the audio level in a modulator is carefully increased. In the modulator, too high of signal level can overdrive the MTS circuits and audio performance will suffer.
No Stereo … When using the TV outputs to send audio to a home theater system, be sure the TV is in the stereo mode for external speakers. Consult the TV manual, this is often confusing and is different for different TV brands.
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. See the section on programming.
Sample System Diagram
SATELLITE | In this system, CATV or antenna | |
|
| |
RECEIVER | channels are available on all TVs. In | |
| addition the following channels have | |
| been added: | |
| Channel 66 | - Front door channel |
Video/audio out | Channel 68 | - VCR |
CCTV Camera | Channel 70 | - Satellite receiver |
at front door | Channel 72 | - DVD player |
| ||
Model 5645
| D |
|
| B |
| A B C D |
OUTPUT | CH |
|
| CH |
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|
|
| Remove jumper for | |
|
|
|
|
|
| (See manual) |
POWER | C |
|
| A |
|
|
15VDC | CH |
|
| CH |
|
|
600mA |
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|
|
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| VIDEO | AUDIO L | AUDIO R | VIDEO | AUDIO L | AUDIO R |
Video/audio out | Video/audio out |
|
12:00
VCR
DVD
VCR
RG6 coax
Model 3308 Coax panel
(Distributes to as many as 8 TVs)
CATV/Antenna
6 | 3 |