Incorrect signal strength indicator

[Retrofan]

Hello, when using DVBViewer Pro and/or DVBViewer Media Server with AVM Fritz!Box 6690 Cable (and others) the signal strength isn't displayed correctly. It shows 53% for example, but actually the signal strength is around 80-90%. When using M3U files (TS stream) the signal strength is shown as 100% which is also no problem at all.

[Griga]

4 hours ago, Retrofan said:

Hello, when using DVBViewer Pro and/or DVBViewer Media Server with AVM Fritz!Box 6690 Cable (and others) the signal strength isn't displayed correctly. It shows 53% for example, but actually the signal strength is around 80-90%

 

How do you know? The Sat>IP specifications state that the signal level should be reported by the server as a numerical value between 0 and 255. DVBViewer maps it to a 0..100% scale by dividing it by 255 and multiplying it by 100.

 

[Retrofan]

Okay, I see. I meant, I expected a much higher value. This is based on the diagnostic tool build inside the Fritz!Box for DVB-C signals. It ended up in a signal strength between 2 and 5 dBmV.

[Retrofan]

[Griga]

Sat>IP specifications:

 

Quote

Signal level: Numerical value between 0 and 255. An incoming L-band satellite signal of  
-25dBm corresponds to 224
-65dBm corresponds to 32
No signal corresponds to 0 

 

That's all. No special indication for DVB-C.

 

[Retrofan]

Okay, I see! Maybe nice to have a setting for the user to override this in DVBViewer / DMS? I know Tvheadend has this setting and minisatip as well.

[Retrofan]

@Griga: I hope you will add this option for DVB-C in the next release as well 😉

Edited April 28, 2025 by Retrofan

[Retrofan]

I also checked the signal scale setting in Tvheadend and it also gives the same result as DVBViewer (setting 240). However, in Tvheadend this setting can be changed. I my case I correct the scale from 240 to 120.

 

Signal scale (240 or 100) : Not all SAT>IP servers use the same signal scaling. Change this setting if the signal level displayed within Tvheadend looks too low.

Edited April 29, 2025 by Retrofan

[Retrofan]

For now I'm using minisatip to fool the indicator 🙂

But it would be nice if DVBViewer also has it's own setting for doing this.

 

Edited June 4, 2025 by Retrofan