21 replies to this topic

[JasonM8]

With dual dvb-c tuners one can record at least two cable channels at once (and possibly more). With a single FBC dvb-c tuner one can record 8 channels at once, but is that guaranteed regardless of what channels they are? In other words, are you guaranteed to be able to record any 8 channels at the same time?

 

I am specifically talking about cable channels, with single coax wire going into the tuner.

 

Will this also work with any cable operator?

 

Thanks

Edited by JasonM8, 27 March 2017 - 08:02.

[Pr2]

With a Dual DVB-C you can record any channels that are on 2 different frequencies.  With FBC tuners you can record channel from different frequencies.

[WanWizard]

And yes, it will work with any operator. All available frequencies are on the cable simultaneously, so the 8 tuners kan tune into 8 different ones without issues. 

[Rob van der Does]

With a Dual DVB-C you can record any channels that are on 2 different frequencies.  With FBC tuners you can record channel from different frequencies.

To be more precise: with FBC tuners you can record channels simultaneously from 8 different frequencies.

[cheapwatcher]

So, you can record every channel that is on one of those 8 frequencies.

[mrbeam]

You are limited also by the amount of Demuxers.

 

https://wiki.openpli.org/comparison

[Erik Slagter]

The amount of demuxer is in practice only relevant when you add USB tuners or virtual tuners. The receiver always has enough demuxers to use all the pluggable tuners at the same time.

[mrbeam]

The amount of demuxer is in practice only relevant when you add USB tuners or virtual tuners. The receiver always has enough demuxers to use all the pluggable tuners at the same time.

Is this true?

 

I did a test when i just had the HD51. I tuned both DVB-S2 tuners to 2 different transponders, one as full screen and the 2nd transponder as pip.

Then tried to record as many channels as possible, but was limited by the amount of demuxers.

[cobus]

Hd51 don't have fbc tuners.

[Erik Slagter]

Besides that, the amount of demuxers is never the limitation. The limitation is in the cpu power required for moving the data around and the amount of pidfilters available per demuxer. Also some manufacturers don't implement a descrambler on all demuxers, which would mean the amount of encrypted services is limited, but it's rare these days.

Edited by Erik Slagter, 29 March 2017 - 18:12.

[Pr2]

Hi,

 

I wake up this post because in my VU+ Duo4K I have a DVB-S2 FBC tuner and also a DVB-C FBC tuner.

 

I am not using DVB-S2 in FBC so I will speak of the DVB-C.

 

I have just the cable from my cable operator. When I record I can use tuner I and J then I am stuck, so I went into the box setup and also enable the DVB-C FBC virtual tuner K. But when I zap to a DVB-C channel and that the K tuner is used I have a black screen "no PAT found in PMT". So I cannot use more than 2 tuners at the same time in DVB-C with my current setup.

 

Do I need to add additional hardware in my setup to fully use DVB-C in FBC mode?

 

Honestly I was thinking that the tuner will manage itself internally the FBC so that just by plugging the cable in I will be able to fully use all the FBC virtual tuners.

 

Thanks,

 

Pr2

[Pr2]

Hi,

 

Self answer, it is useless to put a FBC tuner into the Slot 2, since this slot is only capable to properly handle 2 tuners.

I switch my tuner slot so DVB-C is now in slot 1 and I can use several FBC tuners ABCDE... while the same tuner in slot 2 only properly support IJ (it tries to use the K tuner but screen remains black).

 

So this a hardware limitation from VU+ only slot 1 is FBC at least for Solo4k and Duo4K.

 

Pr2

[WanWizard]

Not correct. I have two FBC tuners in my Duo 4K, and both work fine.

 

There might be a limitation specific to DVB-C (in number of tuners supported, and in which slot you can place them).

[ims]

May be - Duo4k - official note:

One FBC tuner supports 8 demodulators. Two slots make it 16 demodulators totally.

    Slot A : FBC DVB-S2X, FBC-C V1/V2 and Dual T2(MTISF) Tuner
    Slot B : FBC DVB-S2X, FBC-C V2 and Dual T2(MTISF) Tuner

* FBC-C V1 Tuner can only be connected to slot A. 

 

[Pr2]

Who knows if my tuner is V1 or V2?
From the test looks like it is a V1 but I would like to be sure.
DVB-C NIM BCM3148

Edited by Pr2, 31 July 2021 - 15:20.

[Dimitrij]

Vuplus DVB-C NIM(BCM3148) --> FBC-C V1 ?

Vuplus DVB-C NIM(BCM3158) --> FBC-C V2 ?

 

https://www.mondopla...C-v2-pg_ft-7031

Edited by Dimitrij, 31 July 2021 - 15:22.

[Pr2]

Thanks you answer to my question.
So I really need to switch my tuner in this box.

[ims]

Who knows if my tuner is V1 or V2?
From the test looks like it is a V1 but I would like to be sure.
DVB-C NIM BCM3148

Ver. 2 has texts RF-OUT and RF-IN right to output/input, ver. 1 has this texts left.  See here and roll down

Edited by ims, 31 July 2021 - 17:53.

[Pr2]

Thanks mine is V1 and when swapping I look at the motherboard of the tuner and it is written on it.

[Dimitrij]

Ver. 2 name?

 

Vuplus DVB-C NIM(BCM3148)

or

Vuplus DVB-C NIM(BCM3158)