3 replies to this topic

[420f00f3]

Hi,

 

This is all new to me, so please be patient with me.

 

I have a question with regards to my DVB-S/S2 tuner DVB-S NIM(45208 FBC) (DVB-S2).

 

On my DVB-C tuners A to H I can watch/record/stream from 8 multiplexes at the same time, as it has 8 tuners

and my cable TV has cca. 16 multiplexes that are transmitted in clear QAM and I know I can only

watch/record/stream from maximum of 8 multiplexes at the same time.

 

 

But on my DVB-S/S2 tuners I to P I can only ever watch/record/stream from one transponder (on 1 sat position 13E, 19E or 23.5E).

 

Now I am trying to establish if this is limitation of my setup or something that has not been correctly configured on the Vu+/Enigma2.

 

 

My Vu+ setup is:

- Tuners A - H | DVB-C NIM(BCM3148) (DVB-C) - locale Cable TV provider

- Tuners I - P | DVB-S NIM(45208 FBC) (DVB-S2) - LBN1 in - DiSEqC switch ports 1 - 19E, 2 - 23.5E, 3 - 13E, 4 - unused

- Tuners Q - R | DVB-T NIM(TT3L10) (multityp DVB-C/T2) - unused

 

My box is running lates version of OpenPLI (opkg update && opkg upgrade)

System OE: PLi-OE

Firmware version: OpenPLi 8.3-release (2022-09-06-release-8.3)

Kernel / Drivers: 3.14.28 / 20190424

and watching TV programs from all 3 sat (13E, 19E or 23.5E) positions works as it should.

 

 

DVB-S NIM(45208 FBC) (DVB-S2) is FBC as I understand it can at the same time tune to

8 transponders if only one LNB cable is connected or 16 transponders if 2 LNB cables are connected to this tuner

from the same DiSEqC switch port/satellite position?

 

Reading this article is not really helping me to understand it :(

https://web.archive....ll_Band_Capture

 

I would be great full if anyone can explain/point to right direction further 

how it works with the satellite/transponders and the DVB-S/S2 FBC tuner from Vu+.

[mimisiku]

Satellite reception can only tune to 1 transponder. FBC for cable can use the full bandwidth, sat only the quadrant it's tuned to. If you insist on DVB-S2 FBC you will need to install Quadro LNB's (VL,VH,HL,HH) or change to UniCable  LNB. There's nothing wrong with your current setup.

[420f00f3]

Thanx for your reply, can you please clarify below?

 

Sat only the quadrant tuned to?
What happened to transponders? Is transponder (in DVB-S/S2) not similar to multiplex (DVB-T/T2 C/C2)?
I thought that like in DVB-T/T2 - C/C2 the amount of tuners = multiplexes that can be tuned at one time. This is getting more complicated

So both changes require change of LNB's for all the positions (13E, 19E or 23.5E), right? ....... as I can only get I coax cable to the tuner/Vu+ box a the moment.

I see so what I have it's just single LNB with only one output for each sat position, but there are
- Quad LNBs which had four connections,
- Octo LNBs with eight connections.
- Quattro LNB that are used with Multiswitches where 4 cables are needed for VL,VH,HL,HH for each satellite position so in my case 12 cables (for 13E, 19E or 23.5E) going into a Multiswitch

and then one to the tuner/Vu+ ??

- Unicable LNB

Unicable 1 LNBs usually come with 4 SCR although they are technically capable of more ??

Unicable 2 (JESS) LNBs usually come in 24 or 32 SCR. 

I'm still confused

 

 

Ref:

https://www.linuxsat...using-unicable/

[Abu Baniaz]

If you are using universal LNBs, you will not get the full benefit of FBC tuners.

 

You have several options which you have already listed. Make sure you use a Jess/Unicable compatible multi-switch. There are some switches which allow wideband LNBs. They would need two cables instead of 4.

 

Another option is to use a unicable LNB for the main satellite. You can configure several tuners/demodulators for that satellite. The other two satellites can stay on a diseqc switch and will still be limited.