how to calibrate with a voltmeter , my 888s

[Shawn Simpson]

Audio signal by its very nature is an alternating current; there is a positive and negative phase to each cycle. I use a Fluke 87 with a cable just like Craig described. I actually have about a dozen or so sets of leads (bananas are cheap) with male and female xlr's, TRS, TT, military, and a couple with plane old terminal screw or alligator clips. Certainly makes things go much smoother when you can just plug right in.

[gould]

well i got a meter,i put it on V-20, my outputs so far on the 888 are output 1= 0.98 output 3= 0.98 output 8 = 0.95 I dont have 2000m on mine. i hope i have it on the right setting. sounds like there low. suppose to be 1.23 isnt it.

[Craig F]

what meter did you get?

[gould]

one from walmart, forgot what its called, just a multimeter

[O.G. Killa]

Originally Posted by Shawn Simpson

Audio signal by its very nature is an alternating current; there is a positive and negative phase to each cycle. I use a Fluke 87 with a cable just like Craig described. I actually have about a dozen or so sets of leads (bananas are cheap) with male and female xlr's, TRS, TT, military, and a couple with plane old terminal screw or alligator clips. Certainly makes things go much smoother when you can just plug right in.

Yup you are correct. My apologies. It is AC. I just talked to the Cheif Tech here at the studio... he suggested getting something like a behringer cable tester. It has a tone generator in it that will do +4dBu and -10dBV and from his experiences he said it's pretty accurate. It generates tone to all it's outputs so that might be the best way to go... plus you'll have a quick and easy cable tester. *shrug*.

[gould]

well i got a meter,i put it on V-20, my outputs so far on the 888 are output 1= 0.98 output 3= 0.98 output 8 = 0.95 I dont have 2000m on mine. i hope i have it on the right setting. sounds like there low. suppose to be 1.23 isnt it.

[NuBus]

Here's How Digi Suggests How to Calibrate your 888

http://www.digidesign.com/index.cfm?...&categoryid=34

[Felix]

well, this still doesn't really answer the question good enough as I'm not too confident about it.
I've been thinking I can use my Lucid DA convertor as a 0 dBu test tone (using a test tone generator off the laptop going digital into the Lucid and adjust the output of the Lucid until it reads 0 dBu for it's output).
I then calibrate my Rosetta AD to have that tone = -14 dbFS.
This seems adequate as it shows up on my mixer as 0 dBu.
Then I use the Rosetta AD in calibration mode as a VU meter to calibrate the outputs of the 888|24. so a -14 reading can be considered as 0 dBu.
However, when I run the 888 output into the input to set the input to -14, i can't get the trim to get past around -15.2 . i gotta be doing something wrong here. (the inputs are set to balanced line input)

the Digidesign web page states:
4. Using an AC Voltmeter, measure across pins 2 & 3 of the output XLR (or across the tip and ring of a TRS plug). Adjust the output trim pot until the voltage reads 1.228V (for +4dBu) or .316V (for -10dBV)

what I need to know is what should the meter be set to?
my meter has either 200 or 600 ACV settings. if these won't work, then what settings does a Multimeter need to be used in step 4? any suggestions on a Multimeter to get that can do this that isn't well over $100. as cheap as can be in order to just get this task accomplished.

[Rail Jon Rogut]

http://www.amazon.com/Fluke-115-Comp.../dp/B000OCFFMW

Rail

[Craig F]

Originally Posted by Rail Jon Rogut

http://www.amazon.com/Fluke-115-Comp.../dp/B000OCFFMW

Rail

nice deal