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Bug #6116

LNB C Band (bandstack) not tunning properly

Added by Alberto Palau 11 months ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
DVB
Target version:
-
Start date:
2022-01-01
Due date:
% Done:

0%

Estimated time:
Found in version:
4.3-1986~g09a2c71ab
Affected Versions:

Description

When tunning transponders with this LNB Tvheadend can't lock the transponder properly, no SNR is shown, the workaround for me and it only works with a few transponders is to add 600 to the frequency for some Horizontal transponders and substract 600 for the Verticals, these type of LNB use two frequencies 5150 and 5750 one for each polarity as per what I have read so far, may you please apply a patch to fix this problem?

More info:

I have compiled a fresh TVHeadend, the latest and greatest version, I have also noticed for some transponders the polarization has to be inverted to be able to tune them.
Please see logs

2022-01-01 19:43:19.595 [   INFO] mpegts: 3960V in Intelsat_21 - tuning on TurboSight TBS 6909x (Octa DVB-S/S2/S2X) #1 : DVB-S #0
2022-01-01 19:43:22.282 [   INFO] subscription: 0001: "scan" subscribing to mux "3960V", weight: 5, adapter: "TurboSight TBS 6909x (Octa DVB-S/S2/S2X) #1 : DVB-S #0", network: "Intelsat_21", service: "Raw PID Subscription" 
2022-01-01 19:43:26.217 [WARNING] linuxdvb: Unhandled ERROR_BIT_COUNT scale: 0
2022-01-01 19:43:32.204 [   INFO] mpegts: 3960V in Intelsat_21 - scan no data, failed
2022-01-01 19:43:32.204 [   INFO] subscription: 0001: "scan" unsubscribing

After inverting polarity

2022-01-01 19:48:02.248 [   INFO] mpegts: 3960H in Intelsat_21 - tuning on TurboSight TBS 6909x (Octa DVB-S/S2/S2X) #1 : DVB-S #0
2022-01-01 19:48:02.510 [   INFO] subscription: 0001: "scan" subscribing to mux "3960H", weight: 6, adapter: "TurboSight TBS 6909x (Octa DVB-S/S2/S2X) #1 : DVB-S #0", network: "Intelsat_21", service: "Raw PID Subscription" 
2022-01-01 19:48:03.224 [WARNING] linuxdvb: Unhandled ERROR_BIT_COUNT scale: 0
2022-01-01 19:48:04.132 [ NOTICE] mpegts: mux 3960H in Intelsat_21 old params DVB-S2 freq 3960000 H sym 30000000 fec 5/6 mod PSK/8 roff 20 is_id -1 pls_mode ROOT pls_code 1 (00000004)
2022-01-01 19:48:04.132 [ NOTICE] mpegts: mux 3960H in Intelsat_21 new params DVB-S2 freq 3950000 H sym 30000000 fec 5/6 mod PSK/8 roff 20 is_id -1 pls_mode ROOT pls_code 1 (00000004)
2022-01-01 19:48:04.132 [ NOTICE] mpegts: mux 3960H in Intelsat_21 old params DVB-S2 freq 3960000 H sym 30000000 fec 5/6 mod PSK/8 roff 20 is_id -1 pls_mode ROOT pls_code 1 (00000004)
2022-01-01 19:48:04.132 [ NOTICE] mpegts: mux 3960H in Intelsat_21 new params DVB-S2 freq 3950000 H sym 30000000 fec 5/6 mod PSK/8 roff 35 is_id -1 pls_mode ROOT pls_code 1 (00000004)
2022-01-01 19:48:05.571 [   INFO] mpegts: 3960H in Intelsat_21 scan complete
2022-01-01 19:48:05.571 [   INFO] subscription: 0001: "scan" unsubscribing

Any help will be grately appreciated

Much appreciated

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