We’ve had several threads on this topic. A search for “clock cable” will find them quickly. As Pete notes, dCS won’t recommend a particular one. Personally, I recommend starting with a reasonably-priced, well-engineered set so that you can get a baseline before springing into more expensive cables.
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Should you ever need to 
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Biggest problem is to find a good 50ohm bnc cable to connect my 10mhz clock to a word clock.
Your opening question was how to connect Rossini with the clock i.e. the Rossini clock.
Now you ask for
Does that mean that you are no longer talking about Rossini products? Is it just an unidentified 10mhz clock to be connected to an unidentified wordclock?
Rossini Clock does not have an input for an external reference clock. Rossini DAC has two word clock inputs and one word clock output. I’m not positive, but I think all three are 75 ohm connections. And none is for a 10mHz reference clock. What exactly are you connecting?
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Yes both goodies, but they are 75 ohm cables. Givara wants 50 ohm cables.
Trouble is at the time of writing we don’t know exactly what he wants to connect to what.
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My clock is not dCS. I have a 10mhz Cybershaft connected to Sound warrior word clock, and that then in to Rossini.
Another question: sound warrior word clock not like Dcs clock can’t automatically switch from 44.1 to 48, so it’s done manually by clicking a button on the word clock, so do I still need 2 bnc cables connected from word clock to Rossini or 1 is enough?
My question is ; why do you want a 50 ohm cable? AFAIK the Cybershaft 10mHz clocks have 75 ohm outputs as other members here use them with their Vivaldi clocks. That is not to indicate that Cybershaft may not have alternative 50 ohm outputs in addition but the Sound Warrior clock has 75 ohm inputs and outputs:
If you are having to manually switch between 44.1 and 48 kHz sample rates on your clock then you need only connect a single cable to one of the Rossini wordclock inputs. I think that you may need to set the Rossini to wordclock1-2 auto but you will need to check this in practice as I am not a Rossini owner.
Well I also think that if I connect 1 bnc then I should specify what inlet
Yes, you need not only to connect to the BNC input that you have selected but also select it in the menu. I agree , not the auto option though.
Back to the other issue. Are you still looking for 50 ohm cables and, if so, why?
Well yes u can use 75ohm cable to connect cyber and warrior but I’m not sure that there would be no trade off for that. I’ll try to perform some experiments later )
The trade off will be better sound. There is no reason to prefer 50Ohm on any of those devices, and there is a greater selection of properly engineered 75ohm cables. When I acquired my OP21A, Kenji Hasegawa offered either 50Ohm or 75Ohm cables, so I suppose you could get the 50 from him if you wanted. But as long as your Cybershaft model has the 75Ohm capability, why not use it?
@PAR, Pete, thanks for posting that link to the Sound Warrior clock. I could not find it. I am curious, though, whether there is any objective reason for thinking that clock improves Rossini’s performance.
Quite. Clocks are not as straightforward as people think. Just generating a regular pulse is not the full solution. Note the two postings in the last week or two from users of clocks other than a dCS one saying that there was now something “missing”.
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Well, sound warrior + good cybershaf sounds better for me than Rossini clock for what I heard myself (imho). The trade off is that u have to switch manually pressing buttons from 44,1 to 48,… and Rossini clock does that automatically. Actually wanted a Rossini clock, but it has no 10mhz input and price is like 5 times more expensive than a warrior + cybershaft
Then it’s good you are happy with the SQ. Sounds like you have a bargain
If your Cypbershaft only supports 50 ohm output I’d suggest getting the semi-rigid 50 ohm cable from Cybershaft. It’s definitely the best value for money of the available ones. The Sound Warrior can be switched to 50 ohm input.
I currently have an OP20A, the Vivaldi clock and two Sound Warrior word clocks in my system. I’ve been switching back and forth between the Vivaldi clock and the Sound Warrors every week or two for comparison purposes. No definitve conclusion yet but I can at least say that in my system the difference is subtle.
The Sound Warrior is specifically recommended by Hasegawa-san as he’s tested it and confirmed it’s able to maintain the performance of his clocks at the outputs. The DDS approach used in these is totally differnent than the PLL used in the Vivaldi clock and has some distinct advantages for converting a high accuracy word clock input. On the other hand the Vivaldi clock was designed specifically for use with the Vivaldi and has some interesting features like dither, plus it looks a lot nicer 
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Well the price for sound warrior is less than iPhone and Vivaldi clock is priced like a not bad car, so vivaldi should be lot nicer )))
Jeff, do you have two of the Sound Warriors for the purpose of covering both frequency ranges? Or is there some other purpose? Forgive me for not remembering, are you also running the Upsampler?
Hi Pete, yeah, I’m using one for 44 and one for 48. With my PC audio playlists it’s pretty frustrating to have the switch the frequency back and forth. These are not particularly pricey units so it made sense to just get two.
I am indeed using the upsampler, so I three box stack (except when I’m using the Sound Warriors!)