rhode & schwarz SGDF D2mac generator - UK Vintage Radio Repair and Restoration Discussion Forum

thx1138 · 22nd Mar 2010, 11:07 am

Hi,
I know this isnt so vintage, but I have aquired one of these with a suitable d2mac cable/av decoder.
Has anyone a schematic for this generator, R&S didnt respond.
Id like to interrupt the output of the generator and input other audio/video sources while maintaining the orig d2mac pulses. However the main pcb is so full of eproms and so on that Im not going to risk damaging this without some careful reading. maby a waste of time but I dont see standalone D2mac encoders out there even in bcast surplus suppliers.

ppppenguin · 22nd Mar 2010, 11:16 am

This may be a silly question, but is anyone still transmitting MAC in any form? ISTR the Scandinavians used it fairly seriously. Also the ill fated BSB with their squarial.

And then there was 405MAC

Steve_P · 22nd Mar 2010, 12:34 pm

Was 405MAC ever transmitted then?

Cheers,

Steve P.

ppppenguin · 22nd Mar 2010, 12:40 pm

I believe it was for one day only, just 10 days short of 23 years ago.

thx1138 · 22nd Mar 2010, 6:44 pm

hah 405mac that would be rather amusing wonder if my aurora could be told to do that. Last d2 mac was Danish dr2 back in 2006 from memory.

ppppenguin · 22nd Mar 2010, 7:00 pm

Quote:

Originally Posted by thx1138

hah 405mac that would be rather amusing....

Have a careful look round the "publications" section of my website

Tazman1966 · 22nd Mar 2010, 10:03 pm

Quote:

Originally Posted by ppppenguin

I believe it was for one day only, just 10 days short of 23 years ago.

Steve_P · 23rd Mar 2010, 12:45 am

Getting this back on track, D2MAC was used with Eurocrypt in the 1990s. It is a development of MAC, which was developed by the IBA in the 1980s. Before we were all talking about MAC Addresses.

You can get the data about D2MAC and Multiplexed Analogue Content by starting here:

http://en.wikipedia.org/wiki/D2-MAC

As to it's use and generation, last time I looked for Analogue signals then there were a few stations left feeding items of dubious content to certain countries. They have probably all gone now.

Anyone got a decoder and lets have this thing up and running, as it is probably one of the the vintage item of the future.

Cheers,

Steve P.

thx1138 · 23rd Mar 2010, 3:54 pm

Hi Steve,
Yes dubious signals alright takes me back. Its fun transmitting the output from the generator via wireless link on i assume 2,4ghz and watching the thing lock up like old days via my philips decoder. Cant see any real practical use for this one but its nice to use it for checking monitors and vt machine if nothing else.

22nd Mar 2010, 11:07 am	#1
thx1138 Tetrode Join Date: May 2007 Location: Bratislava, Slovakia Posts: 65	rhode & schwarz SGDF D2mac generator Hi, I know this isnt so vintage, but I have aquired one of these with a suitable d2mac cable/av decoder. Has anyone a schematic for this generator, R&S didnt respond. Id like to interrupt the output of the generator and input other audio/video sources while maintaining the orig d2mac pulses. However the main pcb is so full of eproms and so on that Im not going to risk damaging this without some careful reading. maby a waste of time but I dont see standalone D2mac encoders out there even in bcast surplus suppliers.

22nd Mar 2010, 11:16 am	#2
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: rhode & schwarz SGDF D2mac generator This may be a silly question, but is anyone still transmitting MAC in any form? ISTR the Scandinavians used it fairly seriously. Also the ill fated BSB with their squarial. And then there was 405MAC

22nd Mar 2010, 12:34 pm	#3
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: rhode & schwarz SGDF D2mac generator Was 405MAC ever transmitted then? Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

22nd Mar 2010, 12:40 pm	#4
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: rhode & schwarz SGDF D2mac generator I believe it was for one day only, just 10 days short of 23 years ago.

22nd Mar 2010, 6:44 pm	#5
thx1138 Tetrode Join Date: May 2007 Location: Bratislava, Slovakia Posts: 65	Re: rhode & schwarz SGDF D2mac generator hah 405mac that would be rather amusing wonder if my aurora could be told to do that. Last d2 mac was Danish dr2 back in 2006 from memory.

23rd Mar 2010, 12:45 am	#8
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: rhode & schwarz SGDF D2mac generator Getting this back on track, D2MAC was used with Eurocrypt in the 1990s. It is a development of MAC, which was developed by the IBA in the 1980s. Before we were all talking about MAC Addresses. You can get the data about D2MAC and Multiplexed Analogue Content by starting here: http://en.wikipedia.org/wiki/D2-MAC As to it's use and generation, last time I looked for Analogue signals then there were a few stations left feeding items of dubious content to certain countries. They have probably all gone now. Anyone got a decoder and lets have this thing up and running, as it is probably one of the the vintage item of the future. Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

23rd Mar 2010, 3:54 pm	#9
thx1138 Tetrode Join Date: May 2007 Location: Bratislava, Slovakia Posts: 65	Re: rhode & schwarz SGDF D2mac generator Hi Steve, Yes dubious signals alright takes me back. Its fun transmitting the output from the generator via wireless link on i assume 2,4ghz and watching the thing lock up like old days via my philips decoder. Cant see any real practical use for this one but its nice to use it for checking monitors and vt machine if nothing else.