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DISH SETUP: Single sat, Multi-Sat & Motorised
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Long Cable RG-11 Issue
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<blockquote data-quote="Asoet" data-source="post: 1010604" data-attributes="member: 410453"><p>Thanks ST-1 for your suggestion, in fact yes this installation is for professional used. For your question what I can answer is following :</p><p></p><ul> <li data-xf-list-type="ul">Connectors: Are you using simple twist-on F-connectors, or RF-tight compression connectors throughout? RF Tight Compression</li> <li data-xf-list-type="ul">Cable proximity: does the coax cross power lines (even 220V) anywhere? Or (worse) run alongside at any length? This one not sure, the cable was laying on the office building following cable shaft.</li> <li data-xf-list-type="ul">Household equipment proximity: is any of the signal path passing close to washing machines or boilers that could induce power surges into the coax cable? Need to check but I don't think so.</li> <li data-xf-list-type="ul">Neighbours: if you live in a "multiple dwelling unit" (ie. apartment buliding or the like), then your neighbours may have a bad microwave or wireless phone which can cause interference. This can be very difficult to diagnose.</li> </ul><p></p><p>I also suspect the interference is a problem but it's so hard to find where is the interference coming from. I have 2 dish both with dual polarity, once the problem comes it's happen to all of dish and both polarity in the same time and also i notice the down time is only 6 - 8 seconds. It's looks like some signal blasting for only several second between the dish and the cable.</p><p></p><p>This problem has been happened a month, I try to make simulation by using 6 feet dish with same setup in my office (same cable length, same IRD, same Amplifier and splitter).</p><p>In my simulation setup I also found same issue but less frequent (once or twice a days) maybe since I am only using small dish and reception quality is not so good (2 dB margin, 6 dB C/N).</p><p></p><p>I did some analyze even using professional spectrum analyzer since I though there is wimax interference and did following :</p><p></p><p>1. Trace Maximum signal recorded</p><p>2. Trace Minimum signal recorded</p><p></p><p>Put the analyzer until get demodulator unlock alarm but then when I see the trace signal recorder there was no signal drop at all or unwanted carrier/signal neither.</p><p>This result made more confuse to find out the interference source.</p><p></p><p>The only clue I have now is 6-8 seconds down time every problem happen and big C/N number without drop or unwanted signal interference.</p><p>I never have this kind of issue with this symptom before therefore I need an advise.</p><p></p><p>Note : I am using 8 way passive splitter in the end of the cable to split into 8 IRD (is there any effect)</p></blockquote><p></p>
[QUOTE="Asoet, post: 1010604, member: 410453"] Thanks ST-1 for your suggestion, in fact yes this installation is for professional used. For your question what I can answer is following : [LIST] [*]Connectors: Are you using simple twist-on F-connectors, or RF-tight compression connectors throughout? RF Tight Compression [*]Cable proximity: does the coax cross power lines (even 220V) anywhere? Or (worse) run alongside at any length? This one not sure, the cable was laying on the office building following cable shaft. [*]Household equipment proximity: is any of the signal path passing close to washing machines or boilers that could induce power surges into the coax cable? Need to check but I don't think so. [*]Neighbours: if you live in a "multiple dwelling unit" (ie. apartment buliding or the like), then your neighbours may have a bad microwave or wireless phone which can cause interference. This can be very difficult to diagnose. [/LIST] I also suspect the interference is a problem but it's so hard to find where is the interference coming from. I have 2 dish both with dual polarity, once the problem comes it's happen to all of dish and both polarity in the same time and also i notice the down time is only 6 - 8 seconds. It's looks like some signal blasting for only several second between the dish and the cable. This problem has been happened a month, I try to make simulation by using 6 feet dish with same setup in my office (same cable length, same IRD, same Amplifier and splitter). In my simulation setup I also found same issue but less frequent (once or twice a days) maybe since I am only using small dish and reception quality is not so good (2 dB margin, 6 dB C/N). I did some analyze even using professional spectrum analyzer since I though there is wimax interference and did following : 1. Trace Maximum signal recorded 2. Trace Minimum signal recorded Put the analyzer until get demodulator unlock alarm but then when I see the trace signal recorder there was no signal drop at all or unwanted carrier/signal neither. This result made more confuse to find out the interference source. The only clue I have now is 6-8 seconds down time every problem happen and big C/N number without drop or unwanted signal interference. I never have this kind of issue with this symptom before therefore I need an advise. Note : I am using 8 way passive splitter in the end of the cable to split into 8 IRD (is there any effect) [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
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Long Cable RG-11 Issue
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