DVB and DiSeqC / 22 Khz Switching.. possible?

[sgilani]

Hi,

I've long used an STB to pick up DVB and am now looking to get a DVB-S PCI card, but I have a concern.. I've searched long and hard and haven't gotten an answer, but I'm hoping some folks here can help me on this..

My dish setup is such that I have a mix of DiSeqC and 22khz switching that works perfectly fine on DVB set-top boxes. From what I see in GBPVR, the switching options aren't so robust. Is it possible for me to somehow specify my switching settings? It would basically be something like this:

LNB 1: 22khz off, DiSeqc #1
LNB 2: 22khz off, DiSeqc #2
LNB 3: 22khz on, DiSeqc #1
.. etc, just an example.. I've read about using Multidec plugins and the TSReader program and exporting transponder files from there, but I just don't know how I would do this..

Can someone please help me out and let me know how I can set my switch settings for use with GBPVR? Thanks!

[sub]

Support for diseqc switches isnt covered in the BDA spec, so I have to do a individually implement support for it for each manufacturer. To date GB-PVR has only supported 4-way diseqc switches on Twinhan, Hauppauge and FireDTV devices. A couple of weeks ago I added support for the old 22khz switches on Twinhan devices. I dont know what device you're using...hopefully a Twinhan?

[sgilani]

Yep, I'm just about to pick up a Twinhan but wanted to check here before buying it Sounds great sub! So I can set both DiSeqC and 22khz settings, and would just make a separate capture source for each LNB and its setting, right?

any particular twinhan model I should get? I was looking at a 1020a.. would that work ok?

[sub]

Correct.

[sgilani]

sub, did you mean to say that 22Khz switch support is coming in the next release? I can't find an option for it in .99.12

[sub]

did you mean to say that 22Khz switch support is coming in the next release?

Correct - thats what I said.

Stuff I've implemented post v0.99.12 wont be available until the next release.

[dvdfreak]

Support for diseqc switches isnt covered in the BDA spec, so I have to do a individually implement support for it for each manufacturer. To date GB-PVR has only supported 4-way diseqc switches on Twinhan, Hauppauge and FireDTV devices. A couple of weeks ago I added support for the old 22khz switches on Twinhan devices. I dont know what device you're using...hopefully a Twinhan?

Hi Sub,

Could you add support for Technotrend cards with the following information?

In the "ttBdaDrvApi_Dll.dll" there is a method bdaapiSetDiSEqCMsg() with the following signature:

bdaapiSetDiSEqCMsg(HANDLE handle, BYTE *commandBuffer, BYTE numBytes, BYTE repeat, BYTE toneburst, Polarisation polarity);

The buffer argument is a pointer to a 4-byte array containing the actual diseqc command:

0xE0 0x10 0x38 commandByte

The commandByte is formed as follows:

bit 0: 1 for hi-band, 0 for lo-band
bit 1: 1 for horizontal, 0 for vertical
bits 2-3: nr of the LNB (0 to 3)

So, for example: 00001001 = 0x09 = 2nd LNB, vertical pol., hi-band

numBytes should be set to 4 and repeat to 1. The handle is opened by bdaapiOpenHWIdx().

Does this help? Or do you need more detailed information?

I have a TT3200-S2 card and was hoping to try GBPVR with it, but I have 3 LNB's so the diseqc switching would be a must for me.

Thanks!

[sub]

Do you know what the values are for the toneburst and polarity arguments to this function?

[dvdfreak]

Do you know what the values are for the toneburst and polarity arguments to this function?

Polarity is the numeric value of the enumeration defined in Microsoft's bdatypes.h:

ENUM Polarisation {
BDA_POLARISATION_NOT_SET = -1,
BDA_POLARISATION_NOT_DEFINED = 0,
BDA_POLARISATION_LINEAR_H = 1, // Linear horizontal polarisation
BDA_POLARISATION_LINEAR_V, // Linear vertical polarisation
BDA_POLARISATION_CIRCULAR_L, // Circular left polarisation
BDA_POLARISATION_CIRCULAR_R, // Circular right polarisation
BDA_POLARISATION_MAX,
} Polarisation;

Toneburst I can't say.

[sub]

Cheers - I spotted that one, but wasnt absolutely sure whether it was these same constants, or some historic definition used since their old WDM days (which pre-dated these Microsoft BDA definitions).