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Passthrough issues in Standby
- Thread starter eddiesp
- Start date
Black Hole
May contain traces of nut
I have only just finished my post, you might like to re-read it.
What was the result with power saving on (ie no pass-through)?
What was the result with power saving on (ie no pass-through)?
No difference at the high end end but I have to confess I didn't look at the lower channels. I will have another look at them.
D
Deleted member 473
Why should pass through be affected by power saving? Shouldn't it be a physical connection from input to output? I can't imaging why Humax would want to build anything other than a splitter there. If they wanted to output an RF modulated signal from the box, that could be passed on into the splitter. That's the way it used to be done with early VHS recorders, before Scart, isn't it? Why capture the whole spectrum and then re-broadcast it?
Black Hole
May contain traces of nut
There is an in-line amplifier so the pass-through is boosted a bit and should be at a similar level to the input. It would otherwise be at a significantly reduced signal level. The amp is powered with Power Saving in Standby = Off, and unpowered with Power Saving in Standby = On. This is to meet the <1W standby power regulations. See Things Every... section 7.
If Kebos gets the same results regardless of the power saving setting, we could postulate that the pass-through amp isn't working.
If Kebos gets the same results regardless of the power saving setting, we could postulate that the pass-through amp isn't working.
D
Deleted member 473
But surely the result is that it forces the user to fit a physical splitter, and if the signal was considerably reduced without amplification then it will also be considerably reduced using the physical splitter?
Otherwise, power saving must be turned off, negating its use and wasting power.
Anyway, I can't believe that there was enough aerial lead between my box and TV for the TV to receive most signals even with power saving on in the T2! If I just connect that lead to the TV but disconnect its other end, I get no programs at all.
Black Hole
May contain traces of nut
What can I tell you? That's what the blurb says power saving in standby does. If you never use the TV without the HD/HDR (as would be the case if the TV didn't have a digital tuner), it is quite reasonable not to need the pass-through or even an aerial lead to the TV. Even with a HiDef digital tuner in both my HDR-equiped TVs, I rarely use the TV without the HDR simply for the live pause and easy access to the recording schedule.
For information, a properly designed splitter can send nearly 50% of the signal power down each output, but don't expect anything like that on a cheap resistive splitter. An internal splitter could be designed to only pick off what it needed and send the rest onwards, but achieving the same performance regardless of whether the power is on or off is not so easy. An active circuit to do this is much more practical, and the old VCRs of which you speak will have done this without regard to standby power.
That would be power saving on, surely? In any case, even with the amp off there is bound to be some kind of bleed through of signals, and if you are in a strong signal area it could well be enough.
For information, a properly designed splitter can send nearly 50% of the signal power down each output, but don't expect anything like that on a cheap resistive splitter. An internal splitter could be designed to only pick off what it needed and send the rest onwards, but achieving the same performance regardless of whether the power is on or off is not so easy. An active circuit to do this is much more practical, and the old VCRs of which you speak will have done this without regard to standby power.
RobH1
Well-Known Member
Correct, I have power saving on, and just turning the TV on using DVB, I get all the BBC channels from the transmitter at Caldbeck (close) but none from the ITV transmitter at Winter Hill (80 miles away)
D
Deleted member 473
I am very happy with my 8-Way version.
