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DISH SETUP: Single sat, Multi-Sat & Motorised
Unicable LNB vs Universal LNB question
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<blockquote data-quote="archive10" data-source="post: 966167"><p>Depends on cable and condition.</p><p></p><p>If cable is broken or squashed, you may lose certain frequency ranges, but on a good cable you will lose a couple of dB.</p><p></p><p>But if your cable is good, and the signal comes through without quality degradation only slightly wearker, you should not see any difference on the receiver.</p><p>Most receivers are able to compensate for general signal loss through good auto-gain circuitry, so "too weak a signal" is normally less of a problem.</p><p></p><p></p><p>But as you have a meter, please a) measure power and C/N ratio (S/N) while nex to dish/LNB, and then b) at the receiver (plugging the cable into the meter rather than the Dreambox). Measure the transponders in question.</p><p></p><p>This should show clearly if you have power problems, or C/N ratio problems (distortion of signal along cable run).</p><p></p><p></p><p></p><p>There is of course also the possiblity that the receiver is not as good as your meter in terms of decoding signals close to the threshold. You can check this when you are measuring the above mentioned signals at the receiver end of the cable. If you have good picture, the DM is not as good as the meter...</p><p></p><p>Re unicable - this could solve part of the issue if you have a bad cable, or have noise irradiation on certain frequencies. But I think it is unlikely. And as Unicable puts most of the tuner into the LNB, you would have even more possibilities for temeprature variations, as the sun shines on the dish.</p><p></p><p>I have used unicable LNBs for Ku, but that was really in the primary use case of unicable (aka SatCR) where I had to share a single cable to the LNB between four tuners (2 x 2-tuner PVRs).</p><p></p><p>Also, I don't know of any unicable LNBs with a C120 feed-horn receptor. But then again, I haven't really been looking... <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="archive10, post: 966167"] Depends on cable and condition. If cable is broken or squashed, you may lose certain frequency ranges, but on a good cable you will lose a couple of dB. But if your cable is good, and the signal comes through without quality degradation only slightly wearker, you should not see any difference on the receiver. Most receivers are able to compensate for general signal loss through good auto-gain circuitry, so "too weak a signal" is normally less of a problem. But as you have a meter, please a) measure power and C/N ratio (S/N) while nex to dish/LNB, and then b) at the receiver (plugging the cable into the meter rather than the Dreambox). Measure the transponders in question. This should show clearly if you have power problems, or C/N ratio problems (distortion of signal along cable run). There is of course also the possiblity that the receiver is not as good as your meter in terms of decoding signals close to the threshold. You can check this when you are measuring the above mentioned signals at the receiver end of the cable. If you have good picture, the DM is not as good as the meter... Re unicable - this could solve part of the issue if you have a bad cable, or have noise irradiation on certain frequencies. But I think it is unlikely. And as Unicable puts most of the tuner into the LNB, you would have even more possibilities for temeprature variations, as the sun shines on the dish. I have used unicable LNBs for Ku, but that was really in the primary use case of unicable (aka SatCR) where I had to share a single cable to the LNB between four tuners (2 x 2-tuner PVRs). Also, I don't know of any unicable LNBs with a C120 feed-horn receptor. But then again, I haven't really been looking... :) [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Unicable LNB vs Universal LNB question
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