Scan gives only a few channels

[steadyState]

I am using a Hauppauge WinTV-dualHD on a Kubuntu 22.04 machine. I installed with the debian package and software appears to run smooth. At least right to that moment, where I want to scan for channels. I am using the ch-Bern-upc-cablecom setting, which should match. The values in the file correspond to the values given by UPC. I can click "Scan Channels" and I get a few service channels, but I do not get any of the TV stations. The log shows the lines included at the end.
The sameWinTV stick on a Windows machine does find all channels, unfortunately leaving it there is not a solution, and I understood that the files are not compatible. Is there something I can do to make NextPVR search thorougher?


2023-02-20 21:27:11:437 [DEBUG] Scanning from /usr/share/dvb/dvb-c/ch-Bern-upc-cablecom
2023-02-20 21:27:11:437 [DEBUG] Channel config will be saved to /var/opt/nextpvr/adapter0-DVB-C-channels-scan.conf
2023-02-20 21:27:11:775 [DEBUG] >>> Scanning@next
2023-02-20 21:27:11:775 [DEBUG] >>> Scanning 426000000
2023-02-20 21:27:16:093 [DEBUG] ~1~Welcome~sunrise~1~426000000OFF
2023-02-20 21:27:16:093 [DEBUG] ~698~698 Test~sunrise~1~426000000OFF (encrypted)
2023-02-20 21:27:16:093 [DEBUG] ~5010~D4A Code download~sunrise~12~426000000OFF
2023-02-20 21:27:16:093 [DEBUG] ~5020~Converter DL~sunrise~12~426000000OFF
2023-02-20 21:27:16:093 [DEBUG] ~5030~Standby App~sunrise~1~426000000OFF
2023-02-20 21:27:16:093 [DEBUG] >>> Scanning@about to store
2023-02-20 21:27:16:093 [DEBUG] >>> Scanning@about to free loop
2023-02-20 21:27:16:093 [DEBUG] >>> Scanning@about to start next loop (00000000)

[mvallevand]

If you scan manually in Ubuntu, (after stopping the nextpvr-service) with

dvbv5-scan /usr/share/dvb/dvb-c/ch-Bern-upc-cablecom

Do it find any more channels?

Martin

[steadyState]

I would say no, but I get also an error message. It is in german, though, saying something like "ERROR Command BANDWIDTH_HZ (5) not found during query". No idea what it wants to tell me.

FEHLER Befehl BANDWIDTH_HZ (5) während der Abfrage nicht gefunden
Frequenzverschiebung kann nicht berechnet werden. Entweder die Bandbreiten- oder Symbolrate ist (noch) nicht verfügbar.
Scan-Frequenz #1 426000000
Sperre (0x1f) Signal= -38.00dBm S/R= 37.25dB UCB (Anzahl unkorrigierter Fehler)= 0 postBER= 286x10^-3
Dienst Welcome, Anbieter sunrise: Digitalfernsehen
Dienst 698 Test, Anbieter sunrise: Digitalfernsehen
Dienst D4A Code download, Anbieter sunrise: Datenausstrahlung
Dienst Converter DL, Anbieter sunrise: Datenausstrahlung
Dienst Standby App, Anbieter sunrise: Digitalfernsehen
WARNUNG: Einige Dienstkennungen stehen nicht in der SDT-Tabelle.
Dienstkennung 5001 wird gespeichert: »426.00MHz#5001«
Dienstkennung 5002 wird gespeichert: »426.00MHz#5002«
Dienstkennung 5004 wird gespeichert: »426.00MHz#5004«
Dienstkennung 5015 wird gespeichert: »426.00MHz#5015«

[mvallevand]

When you scanned in WinTV what tuning file did you use?

Martin

[steadyState]

Yes, valid question, thanks. There was no Switzerland section, so I used "All Countries / All Frequencies (6900MBd SR)". In fact, I was looking for such an option in Linux as well, but did not find congruent information to create an own settings file.

[sub]

I am using the ch-Bern-upc-cablecom setting, which should match.

Totally wouldn't surprise me if the frequencies in this file are incorrect, so I suggest checking that, and maybe editing it for the correct tuning details.

[steadyState]

Thanks for the heads-up. I had checked that file and still cannot find an error.

File:
[CHANNEL]
DELIVERY_SYSTEM = DVBC/ANNEX_A
FREQUENCY = 426000000
SYMBOL_RATE = 6900000
INNER_FEC = NONE
MODULATION = QAM/64
INVERSION = AUTO

UPC website:
Network-ID: 43020
Frequenz MHz: 426
Frequenz kHz: 426000
Modulation: QAM64
Symbolrate: 6900

[mvallevand]

Did dvbv5-scan create a conf file? If so can you give an example?

Martin

[steadyState]

A dvb_channel.conf is created in the directory, where I invoked dvbv5-scan. This is the content of that file:

[Welcome]
SERVICE_ID = 1
NETWORK_ID = 1
TRANSPORT_ID = 11
VIDEO_PID = 80
AUDIO_PID = 81
PID_06 = 4890
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[698 Test]
SERVICE_ID = 698
NETWORK_ID = 1
TRANSPORT_ID = 11
VIDEO_PID = 336
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[D4A Code download]
SERVICE_ID = 5010
NETWORK_ID = 1
TRANSPORT_ID = 11
PID_06 = 4878 4876 4805
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[Converter DL]
SERVICE_ID = 5020
NETWORK_ID = 1
TRANSPORT_ID = 11
PID_0b = 2394
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[Standby App]
SERVICE_ID = 5030
NETWORK_ID = 1
TRANSPORT_ID = 11
PID_05 = 1345
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[426.00MHz#5001]
SERVICE_ID = 5001
PID_05 = 1207 1206 1205
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[426.00MHz#5002]
SERVICE_ID = 5002
PID_05 = 1225
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[426.00MHz#5004]
SERVICE_ID = 5004
PID_05 = 1266 1265
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[426.00MHz#5015]
SERVICE_ID = 5015
PID_05 = 1286 1285
FREQUENCY = 426000000
MODULATION = QAM/64
INVERSION = AUTO
SYMBOL_RATE = 6900000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A

[steadyState]

I did now also check the frequencies given by NextPVR on Windows and created a dozen of scan files in Linux. Linux and Windows agree on what channel is on what frequency. What I want to say: I now have a file where frequency 338 Mhz is specified. Scanning this frequency gives me some channels, another file with another frequency gives a few more and so forth. I do not know if that is intended behaviour and unless I have a full frequency scan like in Windows, I do not know what the correct frequencies should be.

So if you want, there is indeed some problem with the scan file. From user perspective the problem is elsewhere, though. ;-)