KA-SAT Transponder Setup

funkey_monkey

Having a bit of a nightmare with the satellite setup in my parents home.
It was all working fine at first time of asking - multiswitch setup with 28.2E and 9.0E.

Anyhow, they can't use it so I was changing over to run it on KA-SAT LNB setup.
I'm using a Triax TKT-001 dual KA-SAT LNB on a 90cm solid dish.

My setup is currently bypassing the multiswitch - so is a direct feed from both LNB inputs into the Mutant HD51 running OpenVix with two Si2166D DVB-S2 tuners.

However, to get the signal finder on the STB to pick up a signal, I need to set the voltage level to 13V. I have been informed by OpenVix that the LNB is a dud as Left Circular should be supplied with 18V.
When I modify the tuner setup to anything other than 13V, no signal is detected. Can someone confirm that it sounds like a dud LNB or another possibility?

From this link it seems to be correct that LHCP requires 18V

The 18V signal (range 15.5 to 21V) uses horizontal polarization or left-hand circular polarization (LHCP).

https://www.edn.com/Home/PrintView?contentItemId=4014342


Does this sound like a failure characteristic of the LNB that I can obtain a signal on 13V but not 18V? Could it possibly be an image or STB issue?

Is there an easy way to check the voltage level being supplied to the LNB by the STB with a multimeter?


Thanks.

Apogee

The Triax is a rebranded Inverto. The LNBF is working fine.

From the specs:

Polarization selection - LHCP 13 V
Polarization selection - RHCP 18 V

http://www.inverto.tv/lnb/130/twin-ka-circular-dual-polarity-lnb23mm-197-202ghz-lo212o-ghz

funkey_monkey

Thank you Apogee.

Do all KA-SAT LNBs operate with LHCP set to 13V or is that a unique characteristic of the Inverto/Triax version?