Tvheadend

Could you provide '--trace linuxdvb' ? https://tvheadend.org/projects/tvheadend/wiki/Traces

Also, add a screenshot of your mux settings (only the mux edit window).

Ok, could you add mpegts to trace ('linuxdvb,mpegts') ?

Have you tried to force modulation to 8VSB ?

Sorry, 8VSB? I'm recording DVB in the US and am not familiar with 8VSB.

Please explain.

Thanks!!

https://en.wikipedia.org/wiki/Advanced_Television_Systems_Committee_standards#Modulation_and_transmission

OK, but how do I try 'to force modulation to 8VSB'?

I'm not finding anything on your website about8VSB other than the term in several network names.

Thanks!

It's mux tuning parameter - see your picture in comment number 4:

Click on modulation combobox...

Nope, sorry.

Same result.

WAIT!!!

As it happens, SOME of the Muxes DID scan successfully. And, it appears I'm able to record on at least one of them.

So, does this mean the 'AUTO' setting, in this case, is either defective or just not a good idea?

Thanks!!

Neil

Greetings:

I now have 19 of 21 desired channels working. So I thank you TREMENDOUSLY!!!!

Of course, this means I still have two channels that are AWOL.

According to my TV, they are both on 599MHZ and 8VSB with a signal strength of 87(I assume out of 100). Just as good a signal as most of the other channels. They are channels 5.1 and 5.7. They are the only channels that should be available on the 599MHz mux.

I've tried several variations in the mux config, but they continue to throw the 'scan no data, failed' error in the syslog.

Is there anything in the earlier debug logs for this mux that shows a different issue?

Please advise.

Thanks!!

Neil

According this: https://git.linuxtv.org/dtv-scan-tables.git/tree/atsc/us-ATSC-center-frequencies-8VSB , the center frequency should be 599028615 Hz, try to set this.

There's not much to set. Do you see a signal level in the status tab ?

Greetings:

Thank you for your continued assistance!

I set that frequency in the mux settings, then clicked Force Scan on the Network tab while watching the Status/Stream tab in another browser window. I currently have ten muxes configured, so I watch the Muxes tab while the scan is running, paying attention to the Signal Strength column. All of the muxes return a 71% Signal Strength reading, including the now 599.028MHz mux.

The syslog file at first received a 'scan no data, failed' message and the Scan Status column still showed 'Fail', for a couple of minutes. Then it changed to 'OK'. I looked on the Services tab and two new services were listed which are the two missing channels. Hallelujah!

The final entry in the syslog file reads:

Jan 8 18:30:24 carter-pi tvheadend⁴⁵³⁶: subscription: 0049: "scan" subscribing to mux "599.028MHz", weight: 6, adapter: "Auvitek AU8522
QAM/8VSB Frontend : ATSC #0", network: "_dev_dvb_adapter0_Auvitek_AU8522_QAM_8VSB_Frontend", service: "Raw PID Subscription"
Jan 8 18:30:29 carter-pi tvheadend⁴⁵³⁶: mpegts: 599.028MHz in _dev_dvb_adapter0_Auvitek_AU8522_QAM_8VSB_Frontend - scan complete
Jan 8 18:30:29 carter-pi tvheadend⁴⁵³⁶: subscription: 0049: "scan" unsubscribing

Woohoo!!

At this time, my system is working as I think it should! Thank you, thank you, thank you!!!

My only question would have to do with the default 'AUTO' setting for the Modulation, and why it completely failed in this situation. Maybe I'm expecting too much.

In any case, I can't thank you enough!

Thanks you!!

Neil

Neil Carter wrote:

Greetings:

Thank you for your continued assistance!

I set that frequency in the mux settings, then clicked Force Scan on the Network tab while watching the Status/Stream tab in another browser window. I currently have ten muxes configured, so I watch the Muxes tab while the scan is running, paying attention to the Signal Strength column. All of the muxes return a 71% Signal Strength reading, including the now 599.028MHz mux.

The syslog file at first received a 'scan no data, failed' message and the Scan Status column still showed 'Fail', for a couple of minutes. Then it changed to 'OK'. I looked on the Services tab and two new services were listed which are the two missing channels. Hallelujah!

The final entry in the syslog file reads:

Jan 8 18:30:24 carter-pi tvheadend⁴⁵³⁶: subscription: 0049: "scan" subscribing to mux "599.028MHz", weight: 6, adapter: "Auvitek AU8522
QAM/8VSB Frontend : ATSC #0", network: "_dev_dvb_adapter0_Auvitek_AU8522_QAM_8VSB_Frontend", service: "Raw PID Subscription"
Jan 8 18:30:29 carter-pi tvheadend⁴⁵³⁶: mpegts: 599.028MHz in _dev_dvb_adapter0_Auvitek_AU8522_QAM_8VSB_Frontend - scan complete
Jan 8 18:30:29 carter-pi tvheadend⁴⁵³⁶: subscription: 0049: "scan" unsubscribing

Woohoo!!

At this time, my system is working as I think it should! Thank you, thank you, thank you!!!

My only question would have to do with the default 'AUTO' setting for the Modulation, and why it completely failed in this situation. Maybe I'm expecting too much.

In any case, I can't thank you enough!

Thanks you!!

Neil

Some drivers expect exact values in order to correctly scan a frequency. I have the same problem with a number of sticks.

I entered the mux data manually as there are no predefined muxes for my area available, as far as I could find. The odd thing was that the other channels did no thave this issue. No worries!

Again, thanks very much for your help with this!!

Neil