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Accessing MEDIA on the box itself?
- Thread starter JDK
- Start date
Black Hole
May contain traces of nut
No need for LNB change at the dish (in any case there is no compatible $ky wideband LNB as far as I know for prime focus dishes).
The freesat 4k box will work with dSCR (single cable) as well as wideband and universal/legacy feeds.
So a replacement of (or add-on to) the multiswitch will do the same job via the dSCR feature (assuming the present one cannot do dSCR).
https://www.triax.com/product/tmds-42-c-dscr-legacy-2-way-multiswitch-add-on/ is an example device (around £110 with the needed PSU).
The freesat 4k box will work with dSCR (single cable) as well as wideband and universal/legacy feeds.
So a replacement of (or add-on to) the multiswitch will do the same job via the dSCR feature (assuming the present one cannot do dSCR).
https://www.triax.com/product/tmds-42-c-dscr-legacy-2-way-multiswitch-add-on/ is an example device (around £110 with the needed PSU).
MikeSh
Well-Known Member
I didn't say it was needed. The Freesat 4k will work with almost any input, but as it only has two sockets anything other than wideband will limit the number of simultaneous recordings to less than four.
I was just suggesting it was something to consider.
Edit. Or does that Triax box convert to wideband? The data is a bit unclear to me.
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But you can't get a wideband LNB to fit a dish like the OP has...
The Triax module takes the Quattro inputs (or a Quad as it happens) and will then allow dSCR (single cable up to 16 tuners on specific IF frequencies, called for by the receiver box) to be sent on two outputs and legacy mode on any of the four.
That system is widely used in multi-dwelling IRS systems throughout Europe and the UK ($ky HD+ boxes can use it). One cable, carrying VHF, UHF and SAT if desired.
https://en.wikipedia.org/wiki/Single-cable_distribution and https://www.avforums.com/threads/scr-and-dscr-satellite-multiswitches.2099979/ may be of interest?
It doesn't convert to the $ky proprietary two cable wideband scenario. I guess it was cheaper for $ky to have this special LNB/tuner system rather than installing dSCR LNBs on all Q upgrade installs?
Black Hole
May contain traces of nut
'Scuse me for straying a little off topic, but for the purposes of education:
To me, "prime focus" means the LNB is located at the point where the paraboloid dish focuses the incoming radiation, ie at a point roughly half way out to the centre of curvature. Anything other than prime focus means putting an additional (hyperboloid) reflector near the prime focus and redirecting the energy to another location for the LNB. That would waste signal.
Have I got this wrong?
To me, "prime focus" means the LNB is located at the point where the paraboloid dish focuses the incoming radiation, ie at a point roughly half way out to the centre of curvature. Anything other than prime focus means putting an additional (hyperboloid) reflector near the prime focus and redirecting the energy to another location for the LNB. That would waste signal.
Have I got this wrong?
MikeSh
Well-Known Member
If that means there isn't one with a suitable mounting it should be possible to rig something up. The LNB just needs to be at the focus with an appropriate skew.
Given that the box you suggest is £110 (and is going to consume additional electricity) and a wideband LNB is less than £10, it's got to be worth at least thinking about.
(Assuming there aren't other things about the system that preclude it.)
Nope that statement just shows how ignorant you are on LNB and dishes and haven't done a simple Google / Bing to find out more... https://www.satcure.co.uk/tech/lnb.htm is a good basic start.
A SCR LNB might be available for a prime focus dish? https://www.satellitesuperstore.com/lnbs.htm may be a place for the OP to seek further advice, as I'll admit this is getting outwith my specialism and knowledge.
Note this is all to get the ability to record more than two programmes at the same time.
OP also has a Foxsat-HDR that likely could still be pressed into use at the same time as the 4k freesat box operating in legacy mode for (almost) zero outlay. {May need additional cables from the multiswitch, assuming there are spare outs.}
MikeSh
Well-Known Member
I don't claim great knowledge but the last para of that page bears me out:
It is possible to "bodge" an LNB onto the "wrong" type of dish and it will receive signals.
Which is exactly what I suggested could be considered.
Don't be so anti a bit of lateral thinking.
Black Hole
May contain traces of nut
Oh I see. The only distinction is whether the dish focus is on the central axis or offset. Technically, an offset focus is still the prime (ie first) focus of the parabolic reflector (dish), hence my confusion.
The clear advantage of an offset focus is that the LNB and mounting for it doesn't obstruct the signal. We do the same with some designs of reflecting telescope, but figuring the mirror can be quite tricky at optical wavelengths.
The clear advantage of an offset focus is that the LNB and mounting for it doesn't obstruct the signal. We do the same with some designs of reflecting telescope, but figuring the mirror can be quite tricky at optical wavelengths.
You are correct, our prime focus dish is circular (1.2m in diameter) with the LNB held in the middle by 3 identical length arms.