Opened 11 years ago
Closed 2 years ago
#11482 closed Developer Task (Trac EOL)
Implement support for LNAs through DVB API
Reported by: | stuartm | Owned by: | Klaas de Waal |
---|---|---|---|
Priority: | minor | Milestone: | 32.0 |
Component: | MythTV - DVB | Version: | Master Head |
Severity: | low | Keywords: | |
Cc: | Stuart Auchterlonie | Ticket locked: | no |
Description (last modified by )
Since a lot of users have problems with drivers that default to disabling the LNA built into their tuners we should implement support for enabling the LNA when using the card with MythTV.
My experience of handling user support requests in IRC and mailing lists suggests that most users need the LNA enabled, so the simplest solution would just enable by default with a GUI option to disable it.
A better implementation would automatically the LNA if the signal strength/quality falls below a reasonable threshold. The difficulty here is that signal strength can change over time and with changes in weather, so the very best implementation would be tied to the signal monitor and work per-tune rather than be set once when scanning.
Attachments (1)
Change History (15)
comment:1 Changed 11 years ago by
Owner: | set to stuartm |
---|---|
Status: | new → assigned |
comment:2 Changed 11 years ago by
Milestone: | 0.27 → 0.28 |
---|
comment:3 Changed 11 years ago by
Priority: | minor → blocker |
---|
comment:4 Changed 9 years ago by
Component: | MythTV - General → MythTV - DVB |
---|
comment:5 Changed 8 years ago by
Milestone: | 0.28 → 0.29 |
---|
comment:6 Changed 8 years ago by
Milestone: | 0.29 → 29.0 |
---|
comment:7 Changed 7 years ago by
I think we should do this as part of the switch to DVBv5 API (#12638)
comment:8 Changed 6 years ago by
Milestone: | 29.0 → 29.1 |
---|
comment:9 Changed 6 years ago by
Milestone: | 29.1 → 0.28.2 |
---|
Moving remaining open tickets to 0.28.2 milestone
comment:10 Changed 6 years ago by
Milestone: | 0.28.2 → 29.2 |
---|
Moving remaining open tickets to 29.2 milestone
comment:11 Changed 4 years ago by
Cc: | Stuart Auchterlonie added |
---|---|
Status: | assigned → infoneeded |
This is something that looks not too difficult to implement, although it needs a database schema update to store the LNA setting.
I have done comparative testing with "LNA off" and "LNA on" with two different DVB-T2 tuners, a MyGica? T230 USB stick and a Digital Devices PCIe card. On both tuners there is no difference whatsoever between "LNA off" and "LNA on" as shown in the Signal/Noise? and Signal Strength values in the mythtv-setup SCANNING page.
The question is whether implementing this will make a difference for anybody. If there are tuners who are documented to have an LNA then please add them to this ticket. For those willing to test their DVB-T2 tuner, the patch that I used to test this, 20191217-lna-on-off.patch is attached.
Changed 4 years ago by
Attachment: | 20191217-lna-on-off.patch added |
---|
Switch LNA on, off or auto (requires recompliing to change setting)
comment:12 Changed 4 years ago by
Milestone: | 29.2 → 32.0 |
---|---|
Owner: | changed from stuartm to Klaas de Waal |
Priority: | blocker → minor |
Severity: | medium → low |
Status: | infoneeded → assigned |
As this is documented in the DVBv5 and potentially useful it is a good idea to implement this for v32.
comment:13 Changed 3 years ago by
Description: | modified (diff) |
---|
comment:14 Changed 2 years ago by
Resolution: | → Trac EOL |
---|---|
Status: | assigned → closed |
We have moved all bug tracking to github [1]
If you continue to have this issue, please open a new issue at github, referencing this ticket.
Milestone renamed