Maybe this will help you understand what a 'universal' LNB is.
I think you will notice the bandwidth is much wider than a 11300
The top two lines represent a universal LNB. At a set point the lnb will switch the LOF to the second bar, thus 'seeing' the higher frequencies
The big thing is if your decoder can be set to use a universal. The firmware of some boxes only allow for a single frequency to be used....
It's all mathamatical. Can anyone here explain the maths (without using coloured font)?
It's all about beating the LOF with the Ghz sat microwaves to give a sat I.F. (Intermitent freq) of 1~2 MHZ, but I got some barra here for tucker & I don't want it to get cold
That was yummy
Heres more info on that calc
. The satellite signals first go through a band pass filter which only allows the intended band of microwave frequencies to pass through. The signals are then amplified by a Low Noise Amplifier and thence to the Mixer. At the Mixer all that has come through the band pass filter and amplifier stage is severely scrambled up by a powerful local oscillator signal to generate a wide range of distorted output signals. These include additions, subtractions and multiples of the wanted input signals and the local oscillator frequency. Amongst the mixer output products are the difference frequencies between the wanted input signal and the local oscillator frequencies. These are the ones of interest. The second band pass filter selects these and feeds them to the output L band amplifier and into the cable. Typically the output frequency = input frequency - local oscillator frequency. In some cases it is the other way round so that the output frequency = local oscillator frequency - input frequency. In this case the output spectrum is inverted.
More here >
THere are other boxes that can work with a foxtel card but it is probably a lot more complicated for your purposes than simply buying a new 10700 LNB.I'm now more confused with the statement that my LNB will work for Foxtel but not in a Foxtel box. What boxes work with Foxtel besides the ones supplied by Foxtel? I thought that was the whole point, only their boxes have the firmware to decrypt their signal?
I have a fox box that has been working with universal lnb for more than 2 years
One thing I should have mentioned is I spent the first 15 years of my working life as a Radio Technician so I understand well the concepts involved in a superhet receiver and the use local oscillators and I/F frequencies.
The one thing I was confused about is in a traditional superhet receiver the local oscillator is what is actually tuned to receive a particular station, where as with a LNB the LO is fixed, unless it's a Universal LNB where it is switched between one of 2 fixed freqs by sending a 22Khz to the LNB to make it switch LO freq.
So assuming I now understand all that, I can only assume after entering the correct settings into my foxtel box it all should work.
Low Band LO freq 9.75
High Band LO freq 10.60
LNB Power Supply <On>
22 KHz Command <On>
But I get nothing. So I assume the foxtel STU I have ignores some of these settings.
BTW the Foxtel STU I have is the UEC 720 if that makes a difference.
I now have bought a Sharp 10.7Ghz LNB which should hopefully solve my problem, but I'm still interested in knowing what third party units will work with my Foxtel card, as it would be more convienient to only have to move the card and not the whole box.
So thanks everybody for the information so far, and please keep it coming.
I thought I knew some of this stuff, bit I haven't touched it for ages.
I have a dreambox 500 uisng a legit fox card, sharing to a couple of other DBs in the house.
I read this whole thread and others, but still not sire what to do.
I bought today a dual lnb 10700. I change the settings to quite a few combinations
10700 - 10700 - 10700
10700 - 10700 - 11300
10700 - 11300- 11300
9675 - 10600 - 11300
and god knows what. i really can't get past having the new channels but none of the old ones (contrarily to when i was using the 11300 lnb where i was having the old ones but not the new ones or the ones that moved).
What surprises me, but maybe there is a logical explanation for it, is that all the channels are there, since the epg is working. There's just no pictures for some
Anyway, I would appreciate any help you guys can provide.
save & restart box