LNA gain

Discussion about the MiniTiouner board and the MiniTiouner Digital ATV Receive Software. See also http://www.vivadatv.org/index.php
Post Reply
sean2e0saf
Posts: 77
Joined: Thu Nov 21, 2013 5:29 pm

LNA gain

Post by sean2e0saf » Thu Sep 05, 2019 12:40 am

can anyone tell me what the LNA gain is on minituner.. mine says 0.9db with a sad face on beacon with met 8.1 and D5

Thanks
23cms AATV from io83qn ( wn68ns )
23cms DATV from i083qn ( wn68ns )
70cms DATV from io83qn ( wn68ns )

wimo shf-2344
parabeam 70cms/18ele

sean2e0saf
Posts: 77
Joined: Thu Nov 21, 2013 5:29 pm

Re: LNA gain

Post by sean2e0saf » Thu Sep 12, 2019 9:01 pm

Quick question regarding the LNA gain what is exactly the best reading...
23cms AATV from io83qn ( wn68ns )
23cms DATV from i083qn ( wn68ns )
70cms DATV from io83qn ( wn68ns )

wimo shf-2344
parabeam 70cms/18ele

g4eml
Posts: 34
Joined: Thu Apr 26, 2018 9:36 am

Re: LNA gain

Post by g4eml » Thu Sep 12, 2019 11:35 pm

The Tuner has a Low noise amp fitted to improve sensitivity for terrestrial use. When connected to a LNB the signal level can be too high for the tuner and the LNA will automatically reduce its gain. JP added a sad face symbol to indicate the input signal was too high. In practice though it doesn’t seem to make much difference to the received signal quality.
The LNA gain normally settles at around 13dB. If it is significantly below this then you can try attenuating the input signal. Variable attenuators with DC pass through are available on EBay. Just search for Satellite attenuator.

Post Reply

Return to “The MiniTiouner and MiniTioune Digital Receive Software”