Simba27
Panthera leo massaieus
- Joined
- Aug 24, 2004
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- 150
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- My Satellite Setup
- Comag SL55 receiver. Lidl 0.6 LNB. Lidl 80cm dish. Metronic DiSEqC motor. Phillips Freeview box. JVC SVHS Video .Targa 160GB HDD/DVD recorder. 3 x UHF modulators. 6-way Booster/Splitter.
- My Location
- Uxbridge UK
I've recently added a freeview box and a DVD/HDD Recorder to my already complicated setup and my picture quality has degraded. I'm looking for some suggestions on troubleshooting it.
Now I have a chain of devices on my UHF cable: My incoming TV aerial cable goes into my freeview box but that only has a pass-thru, so the output of that goes to a SCART-to-UHF modulator driven by the SCART of the freeview box. The output from that modulator goes into a second modulator, driven by the SCART of my sat receiver. The output of the second modulator goes to my VCR. The output from the VCR goes into my DVD/HDD Recorder - but that is also a pass-thru so I've added a third modulator driven by the SCART of the DVD/HDD Recorder. This then goes to a six way booster/splitter and is sent to all the different rooms of the house.
Aerial --> FV --> FV Mod --> Sat Mod --> VCR --> DHR --> DHR Mod --> Splitter --> TVs
(Item's in bold are the new ones)
With this setup I can watch any device anywhere in the house. I have made sure that the modulators for the freeview and DVD/HDD recorders are after their respective pass-thru inputs, so no device is feeding back into itself. I don't know why, but I had a feeling that might be a bad thing.
The ordinary TV channels are fine, but the modulated channels show interference - typically thin evenly spaced horizontal lines scrolling up the screen or just general fuzziness. I'm thinking that maybe this is coming from the power-supply transformers in the mods - but I don't have any real electronics knowledge to back that up. They do hum a bit. Also, I'm getting quite a shock every time I inadvertantly touch the centre pin of the UHF connectors. Can't be good.
My plan so far is to replace the overly long and thin UHF leads with satellite cable cut to the right lengths to try and cut down on external interference, but that won't help if the interference is being caused by the devices themselves.
I've also been trying different frequencies on the mods because some are clearer than others.
Anybody got any ideas?
Now I have a chain of devices on my UHF cable: My incoming TV aerial cable goes into my freeview box but that only has a pass-thru, so the output of that goes to a SCART-to-UHF modulator driven by the SCART of the freeview box. The output from that modulator goes into a second modulator, driven by the SCART of my sat receiver. The output of the second modulator goes to my VCR. The output from the VCR goes into my DVD/HDD Recorder - but that is also a pass-thru so I've added a third modulator driven by the SCART of the DVD/HDD Recorder. This then goes to a six way booster/splitter and is sent to all the different rooms of the house.
Aerial --> FV --> FV Mod --> Sat Mod --> VCR --> DHR --> DHR Mod --> Splitter --> TVs
(Item's in bold are the new ones)
With this setup I can watch any device anywhere in the house. I have made sure that the modulators for the freeview and DVD/HDD recorders are after their respective pass-thru inputs, so no device is feeding back into itself. I don't know why, but I had a feeling that might be a bad thing.
The ordinary TV channels are fine, but the modulated channels show interference - typically thin evenly spaced horizontal lines scrolling up the screen or just general fuzziness. I'm thinking that maybe this is coming from the power-supply transformers in the mods - but I don't have any real electronics knowledge to back that up. They do hum a bit. Also, I'm getting quite a shock every time I inadvertantly touch the centre pin of the UHF connectors. Can't be good.
My plan so far is to replace the overly long and thin UHF leads with satellite cable cut to the right lengths to try and cut down on external interference, but that won't help if the interference is being caused by the devices themselves.
I've also been trying different frequencies on the mods because some are clearer than others.
Anybody got any ideas?