Cable type for RNC connection - separate Balanced TRS send/returns
TyRip
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#1
2nd November 2005
Old 2nd November 2005
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Cable type for RNC connection - separate Balanced TRS send/returns

Yes I have looked at the RNC hookup sheet... it is not covered

Here is the application: Using the send and return jacks on my Metric Halo ULN-2 with the RNC for tracking. I haven't even tried anything yet, I am just wanting to make sure I have it all wired correctly to avoid any porblems that could come up.

The jacks on the ULN2 are balanced TRS and the RNC is unbalanced TS. I just don't know what kind of cable to use and a call to FMR further confused me. They said to use 3 conductor cable with TRS at one end and TS at the other. Only problem is, I don't know what 3-conductor cable is and how to make sure it is wired properly. I am a complete noob with wiring and connections.

I figured as much as the TRS on one end and TS at the other, but I don't know if I should use line or intrument cable (I am pretty sure it is line) and what type.

Thanks.
#2
2nd November 2005
Old 2nd November 2005
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Metric Halo says that on output to an unbalanced device, you should float the ground; in other words:

From the ULN to the RNC

connect: Tip of the T/S to Tip of the T/R/S
connect: the shield from the Sleeve of the T/S to the Sleeve of the T/R/S
and don't connect the ring on the TRS to anything (important)
This will isolate (float) it.

From the RNC to the ULN, use a telescoping shield.

connect: Tip of T/S to Tip of T/R/S
connect: Sleeve of T/S to Ring of T/R/S
connect: the shield of the cable to the sleeve of the T/R/S
DON"T connect the shield to anything on the T/S end (in other words, make sure it's not contacting anything.

Cable preferences vary; I've used various kinds. Canare is good. Whatever you're using for microphone cables...
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2nd November 2005
Old 2nd November 2005
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Quote:
Originally Posted by TyRip
They said to use 3 conductor cable with TRS at one end and TS at the other. Only problem is, I don't know what 3-conductor cable is and how to make sure it is wired properly.
forgive me if you know this already, but they're talking about a y-cable. TRS on the single end and a pair of TS on the other. an off the shelf (line level) cable should work fine.
TyRip
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2nd November 2005
Old 2nd November 2005
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Quote:
Originally Posted by max cooper
Metric Halo says that on output to an unbalanced device, you should float the ground; in other words:

From the ULN to the RNC

connect: Tip of the T/S to Tip of the T/R/S
connect: the shield from the Sleeve of the T/S to the Sleeve of the T/R/S
and don't connect the ring on the TRS to anything (important)
This will isolate (float) it.

From the RNC to the ULN, use a telescoping shield.

connect: Tip of T/S to Tip of T/R/S
connect: Sleeve of T/S to Ring of T/R/S
connect: the shield of the cable to the sleeve of the T/R/S
DON"T connect the shield to anything on the T/S end (in other words, make sure it's not contacting anything.

Cable preferences vary; I've used various kinds. Canare is good. Whatever you're using for microphone cables...
Wow, thanks a lot Max.

I would have never got the different wirings for the send and returns.

Great instructions, thanks again.
TyRip
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2nd November 2005
Old 2nd November 2005
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Quote:
Originally Posted by zimv20
forgive me if you know this already, but they're talking about a y-cable. TRS on the single end and a pair of TS on the other. an off the shelf (line level) cable should work fine.
Maybe that is what they are talking about, but I didn't and still don't get it, because I told him that I had separate, balanced send and return jacks, so a Y cable or regular insert cable is useless to me in this situation.

He confused me with that one, but I kept asking and kept getting the same response so I just let it go and tried to figure it out. However, it seems Max knows what's going on with this situation.
TyRip
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2nd November 2005
Old 2nd November 2005
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Actually, I think he was just talking about what Max was saying with having the one conductor isolated on both sides.

That was a little rough for me to understand, but I think it is all making some sense now.
#7
2nd November 2005
Old 2nd November 2005
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Well, you could use a "y" cable.

the single end would get an input and an ouput from the RNC.

The double end would go into a input/output pair.

Same diff. Just probably easier to use singles with the ULN.
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