Tvheadend

Jim Learmonth wrote:

Just for info really ..

A few years ago I bought a cheapo USB DVB-T dongle off eBay.
It had all the bits CD, remote, small aerial, that I didn't use.
But the dongle was OK and worked a treat with tvheadend on my pi2 plus kodi client on PIs and windows.
It reported as
Bus 001 Device 012: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T

For one reason or another I thought the dongle had broken, so I bought another off eBay.
The new one was blue not black and a bit bigger. Still came with all the bits I didn't need.
It reported as
Bus 001 Device 017: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T

But the picture quality was awful, so dug out the old dongle and tried that.
It worked and the picture quality was perfect !!

Regards
Jim

I'm not sure what you mean by "picture quality" as the device itself doesn't actually display anything! All it does is decodes a signal & passes it on to software.

The old one has perfect picture quality.
The new one the picture looked similar to what I get when there is a thunderstorm, all broken up etc.
Thanks
Jim

Signal level is the same for both? Are you using your own aerial?
Is there a difference between the two in the dmesg log.

I shall investigate signal level if I can find where it displays.
Aerial is standard home TV aerial.
Every thing is same, I just swap dongle out.
Thanks
Jim

On the Web UI under Status panel I see.
SNR 1% , Signal Strength 1%
This is the good dongle and the picture is perfect.
Jim

Hmm I checked again and it now says
SNR 32.6 dB
Signal Strength 60.9 dBm
This is the good dongle.
Jim

The good on has 0 Transport Errors and 0 Continuity Errors
The bad one show loads of both errors.
Jim