DeltaMike - 9 mins ago »
It’s a Sony Bravia KD-49XE9005
It has two satellite input cables and I assumed it had Freesat built in.
So putting that to one side and going back to the Humax box: both cables work plugged directly into the TV (in fact I’m getting a better picture than I had through the Humax) but when plugged into the Humax it says there’s no satellite signal.
I don’t understand the ‘lost transponder’ - where is the transponder (the only thing I know about transponders is when I used to fly I had a transponder in order for ATC to locate me).
Thanks again.
Just had a look at the spec. This TV does have freesat.
Short Digital TV primer:
Terrestrial Digital TV uses a number of single frequency UHF carriers depending on transmitter, which has data for multiple TV channels multiplexed onto the carrier. Terrestrial TV refers to these as MUX - short for multiplex. Use use a UHF aerial to receive these.
Satellite TV in your case has in effect only 1 transmitter (actually multiple satellites) all located directly above the equator at 28.2E. They orbit the earth in the same direction as it spins at a speed which maintains there position vertically above 0 degrees latitude, 28.2 E longitude. As a result to a observer on the earth they appear to be stationary. The frequencies used are much higher than UHF and are actually in the microwave range.
The dish (which has a parabolic shape) collects these and focusses them on the lnb (the box on the end of the arm). Microwaves are too high in frequency to pass down a coax cable. It's the job of the LNB to downshift to a frequency that can go down a cable (LNB Low noise Block converter).
A satellite MUX (transponder has a frequency used for the carrier and a polarisation Horizontal or Vertical). The frequency band too high to use in one go so the tuner switches the lnb into two halves (High Low) and also between Horizontal or Vertical polarisation. This means that unlike terrestrial a satellite tuner has to send control signals up the coax to the lnb segment it's connected to.
More info
http://www.satcure.co.uk/tech/lnb.htm
One particular transponder at 28.2E transmits the Freesat epg as a data stream and also transmits postcode allocation data to the tuner on setup. This is known as the home transponder. Without reception from this you cannot setup a freesat box/TV.
Full 28.2E Free To Air transponder list is here.
https://en.kingofsat.net/freqs.php?&pos=28.2E&standard=All&ordre=freq&filtre=Clear
The freesat home transponder is txp 115.
Astra 2E 11425.00 Frequency MHZ) H (polarisation) 115 U.K. (UK Spot beam) DVB-S (type 1 modulation_ QPSK (modulation) 27500 (Symbol rate) 2/3 (Forward error correction - FEC) Freesat, 33.8 Mb/s (transponder data rate)
These are the numbers you need to add a transponder using non freesat mode).
Do you have a USB recording drive connected and setup to record connected to your TV ?
If so checking it works as a twin tuner pvr is very simple.
If this works correctly it's looking as if your Humax pvr is faulty. If not it could be a connection issue.
That's why I suggested you swap the two cables around on the Humax box input.
| Mon 9 Mar 2020 13:56:41
#8 |
