dumb tech nerd question

[Guest]

Archived from groups: rec.audio.pro (More info?)

In my never-ending quest for further nerdliness, i recently bought an
old function generator to sit on top of the old 'scope and use on my
little workbench. Now i see audio techs use these things from time to
time to generate nice, accurate test tones and this one seems to do the
deed quite nicely, but the output is an unbalanced BNC connector. What
do you do when you want to feed these things straight into a balanced
input? Use a lowly D.I. box?

--t
[london, canada and occasionally echo cañon, nyc]

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

In article <rorytate-BF44B9.20111130072004@nr-tor01.bellnexxia.net> rorytate@sympatico.ca writes:

> In my never-ending quest for further nerdliness, i recently bought an
> old function generator to sit on top of the old 'scope and use on my
> little workbench.

> the output is an unbalanced BNC connector. What
> do you do when you want to feed these things straight into a balanced
> input? Use a lowly D.I. box?

Hi, Stranger!

That will do it, as long as you can take about a 15 to 20 dB reduction
in level and aren't doing any serious distortion measurements. But
there's no reason to worry about a true differential source for
measurements unless you're doing something critical. Just get or make
a BNC-XLR or BNC-TRS cable with the center conductor going to Pin 2 or
Tip and shield going to Pin 3 or ring. Connecting Pin 3/ring to Pin 1
(sleeve) is optional.


--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

"tim glasgow"
>
> In my never-ending quest for further nerdliness, i recently bought an
> old function generator to sit on top of the old 'scope and use on my
> little workbench. Now i see audio techs use these things from time to
> time to generate nice, accurate test tones and this one seems to do the
> deed quite nicely, but the output is an unbalanced BNC connector. What
> do you do when you want to feed these things straight into a balanced
> input? Use a lowly D.I. box?
>


** Make a lead that has a mono jack plug on one end and a BNC on the
other. Make a short adaptor lead that has a 3 pin on XLR male on one end
and a stereo jack socket on the other. For all jack inputs use the first
lead.

For XLR inputs use the adaptor lead as well - sometimes you will have to
partially insert the mono plug when the hot pin is unusual.






............... Phil