Gigablue Unicable problem. 12 March 2020 drivers

[abu baniaz]

The tuner setup asks if there is an external power source. I assume the answer instructs tuner what to do.

That just tells it to ignore the wake up time. ( just learnt that)

 

[Huevos]

So how are drivers told not to power LNB?

Not sure what you mean. Sending voltage up the co-ax line from the STB will happen regardless of the "externally powered" setting. This can be confirmed with a multimeter.

 

[abu baniaz]

I was asking how to tell the receiver not to send voltage to the LNB when power from receiver is not needed.

 

[Huevos]

Also, if you are using a power pass splitter it should be diode protected so voltage from one STB cannot arrive at the aerial socket of another that shares the same LNB. i.e. the voltage can only flow from the STB to the LNB but not in the opposite direction... and the STB itself should also have diode protection at the socket to prevent external voltage from entering it.

 

[Huevos]

I was asking how to tell the receiver not to send voltage to the LNB when power from receiver is not needed.

1) As far as I know you can't... so if your LNB is powered over a shared co-ax line the device supplying the highest voltage will be the one that powers the LNB. This is due to the diode protection, i.e. if the voltage is greater outside the the STB than supplied by the STB there will be a negative voltage at the protection diode and therefore no forward current from the STB.

2) If you want to be certain the STB is not supplying current to the LNB use a DC blocker. https://www.tdtprofesional.com/es/b...Bq7oyl68nN7aVpRhxMZa29mgOp1_RI_oaApzVEALw_wcB

3) A wall plate for a community Unicable install would/should have a DC blocker built in.

 

[Huevos]

One question for my own education
In a unicable tuner mode do the STB boxes with multiple satellite input sockets produce the voltage on all these socket inputs all the time when the box is switched on or only when a tuner (or tuners connected to the socket by various internal means) is required for watching/recording?

That is the crux of this thread. It would seem that the people writing the closed source drivers don't understand when voltage should or should not be sent to the LNB... or there is not sufficient flow of data from enigma to the driver to be able to work this out... or just coding incompetence.

In the case of the GB, voltage is being switched on/off on the root tuners irrespective of whether one of the link tuners is in use.

In the case of the VU, voltage is always present on socket A (but according to Sicillian's testing it is not clear what is going on at socket B).

As we haven't got access to the closed source code the only way for us to know what is really going on is to test the voltage supplied by each socket with a multimeter.

 

[Sicilian]

The output voltage is controlled by drivers. The "externally powered" is just so Unicable power up delay can be ignored.

@Sicillian, do you know if that inserter block lets voltage through from the STB. e.g. if you remove the power source from the inserter does the VU+ FBC tuner "A" still work?

I've got this connected feeding into a splitter, then to a receiver, but I'll check.

 

[abu baniaz]

In the case of the GB, voltage is being switched on/off on the root tuners irrespective of whether one of the link tuners is in use.

The voltage is being switched off when a Root tuner is not in use. A leaf/link tuner can't function without the root tuner unless LNB has independent power supply. If it does not have an independent supply, root tuner/s should remain powered. But there is no way of telling it to power or not power going by the comments.

 

[Huevos]

The voltage is being switched off when a Root tuner is not in use. A leaf/link tuner can't function without the root tuner unless LNB has independent power supply. If it does not have an independent supply, root tuner/s should remain powered. But there is no way of telling it to power or not power going by the comments.

Yes, beyond the control of the user as far as I can see.

 

[twol]

....... force lnb power on driver change..............

https://github.com/oe-alliance/oe-alliance-core/commit/a282a00645005370090cdaee29580024d7d20d9c

 

[abu baniaz]

Gigablue Unicable problem. 12 March 2020 dri

The issue is solved for me on a GB UE 4K.

 

[CRMS]

....... force lnb power on driver change..............

https://github.com/oe-alliance/oe-alliance-core/commit/a282a00645005370090cdaee29580024d7d20d9c

And what does one do with all that please?? Seems to be 4 files and 2 machines??

 

[ccs]

.... wait until they are released in the next image. (Or build your own.)

 

[CRMS]

Think I'll wait. Meanwhile, have just received a Vision V5-033 DC inserter to power LNB. So will fit that instead of my home made one.

 

[abu baniaz]

I have moved posts relating to the DIY power inserter issue to their own thread, please continue there for discusssions pertaining to the power inserter.
https://www.world-of-satellite.com/showthread.php?63171-DIY-Power-inserter

The updated drivers will be in the next ViX image, probably just before middle of August.

If you want to benefit from the drivers, you can flash OpenATV or any other image built after drivers were updated to resolve the issue.

 

[CRMS]

Thanks. I'll wait for the next Vix image.
And as Sicilian suggested earlier, I'll use a proper DC injector permanently, Vision unit going back for full refund.
Overall, quite a learning curve just to watch TV!!