Goes Abi manager


My current SNR is around 11DB. (cloudy rainy sky)
I manage to receive the Goes 17 data but fail to receive the Goes 16 one.
Tellicast client 2.14.4
In other words - E1H-TPG-3 received
                               "           1 connecting
                               "           2 connecting
red warning ---reset 
I cant explain this - is SNR 11.1 just sufficient for TPG-3 only  and too low for TPG-1, 2 ??
Do you have some explanation and could you please advise ?
Thanks in advance,

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