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TBS6909 signal levels

TBS6909 signal levels

Postby nrm » Tue Oct 10, 2017 10:26 pm

This is what I get with the femon command line.

status SCVYL | signal 55% | snr 74% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 55% | snr 73% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 55% | snr 74% | ber 0 | unc 0 | FE_HAS_LOCK
status SCVYL | signal 55% | snr 73% | ber 0 | unc 0 | FE_HAS_LOCK

The same cable with a TBS6991SE would show SNR at 100%.

I'm using mode 0, which means it uses the Multiswitch.
How can I increase signal quality on this board? Use other mode?
nrm
 
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Re: TBS6909 signal levels

Postby updatelee » Wed Oct 11, 2017 2:17 am

signal level and snr as a % was a horrible idea by the original linux driver developers. What does it mean? not much is the answer.

SNR is signal to noise ratio expressed in dB not % 10%, 50%, 90%, means nothing, definitely not comparable from device to device, or transponder to transponder.

In summary dont worry if the % is lower on your 6909 it doesnt mean the signal is any less then on you 6991

UDL
TBS6925/5980, Prof 7301/7500/8000, Genpix Skywalker-1, Skystar 2 Express HD
Hauppauge 950Q, Kworld 330U/435v3/445v3
Dreambox 800

I use Linux and support open source projects.
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Re: TBS6909 signal levels

Postby nrm » Thu Oct 12, 2017 12:49 am

HI UDL,

Thank you for the feedback.

Regards
NRM
nrm
 
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