leecovuk wrote:... (even when loopthrough is not in place)
Let's stay with this only, as else there are to many side effects.
BTW, definitely no hot plugging...
leecovuk wrote:is it fair to say that a PCI tuner card is more robust and powerful than a USB one? Did I choose the easy and inferior option?
Only partly.
All PCI tuners must have a DC/DC converter, as from the bus we don't get anything like 13 or 18 Volts to feed the LNB, nor the tuning voltage required internally.
For example, the SkyStar 1 Premium / Nexus tuners like mine quite often have a known weakness in that voltage converter stage, due to ageing of a chemical capacitor.
In such a case, only very low DC current is available to feed the LNB. And 22kHz insertion stage was changed between hardware revisions, due to an originally quite low level of that signal, specially on long cable runs or with some older LNBs, that put excessive capacitive load to the port..
leecovuk wrote:Also, on a simple level, can I simply try inserting some kind of booster / amplifier in the chain somewhere within my home? The signal levels reported by different software vary, but the signals might be weak enough to cause problems.Would boosting the signal also improve the DiSEqC connection?
Or is 'electrical power' nothing to do with the 'strength' of the signal? I'm not an electrician unfortunately.
Normally this won't help, as such devices put an extra load to both DC supply and 22kHz insertion stages. Anyway, the RF signal from modern LNBs is amplified very much (~ 55 to 60 dB), so the level on the LNB cable should not be an issue.
All inline amps are only amplifying the RF signal, from the LNB down to the tuner, but not the control signals or DC on the way up.
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