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-   Convergent Design Odyssey (https://www.dvinfo.net/forum/convergent-design-odyssey/)
-   -   prob with nano (https://www.dvinfo.net/forum/convergent-design-odyssey/503279-prob-nano.html)

Dan Keaton December 10th, 2011 08:11 AM
Re: prob with nano
 
Dear Cees,

If you can post the manufacturer and part number of the BNC connector, then I will be happy to research it.

While I am confident that the "whte ring" means that it is not true 75 ohms, we have a way to actually prove it.

We have a very expensive test instrument in our lab. We could, with one of the cables, send a proper HD-SDI through it, then analyze the quality of the signal coming out of the other end.

Of course, I realize that it is not practical for you to send a cable to us.

Ian Thomas December 17th, 2011 02:52 PM
Re: prob with nano
 
Just to let Dan and everybody know i got 2 new cables and got to try one out today on a football match and had no problems so it seems it was the cable

many thanks to all

Dan Keaton December 17th, 2011 08:53 PM
Re: prob with nano
 
Dear Ian,

This is great news.

Thank you for taking the time to report the solution to the problem.

Anthony McErlean December 18th, 2011 08:46 AM
Re: prob with nano
 
Quote:
Originally Posted by Dan Keaton (Post 1701793)
Dear Alister,

I have asked our team to update our manuals.

The first image is of a 50 Ohm BNC connector.

Please note the white ring that is on this connector.

The other two images are 75 Ohm connectors, they do not have this white ring.

50 Ohm connectors and cables have the potential to cause problems.

We advise against using them.
Hi Dan,

What about these, if you google B37P28J999X99 37528

Thanks.

Dan Keaton December 18th, 2011 09:05 AM
Re: prob with nano
 
Dear Anthony,

These items are listed as 75 Ohm, but they have the white plastic collar that is typical of 50 Ohm in the illustration.

The wording could be wrong, the illustration could be wrong, or, of course, I could be wrong.

nanoFlash.net sells 90 Degree True 75 Ohm BNC adapters. I know that these are 75 Ohms, and they do not have the white plastic collar.

nanoFlash.net - HD-SDI Cables and Adapaters

Robin Probyn December 18th, 2011 06:09 PM
Re: prob with nano
 
Dan wrong... ? I think not.. this is an impossible scenario ..

Anthony McErlean December 19th, 2011 10:51 AM
Re: prob with nano
 
Quote:
Originally Posted by Robin Probyn (Post 1704457)
Dan wrong... ? I think not.. this is an impossible scenario ..
I have to agree, cant see Dan in the wrong.

Thanks Dan.

Anthony McErlean December 19th, 2011 11:08 AM
Re: prob with nano
 
1 Attachment(s)
I have this HD-SDI cable Dan, is it a 50 Ohm cable?

Billy Steinberg December 19th, 2011 12:06 PM
Re: prob with nano
 
Don't know about the cable :), but the connector is the correct 75 ohm type.

Billy

Anthony McErlean December 19th, 2011 01:03 PM
Re: prob with nano
 
Quote:
Originally Posted by Billy Steinberg (Post 1704589)
Don't know about the cable :), but the connector is the correct 75 ohm type.

Billy
:) Thanks Billy, thats what I should have said.

Thank you.

Dan Keaton December 20th, 2011 07:41 AM
Re: prob with nano
 
Dear Anthony,

Yes, that is a nice image of a 75 Ohm BNC connector.

Anthony McErlean December 20th, 2011 05:15 PM
Re: prob with nano
 
Thanks Dan.


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