Measuring Mixer Output?

The hows and whys of running sound.
Post Reply
Message
Author
User avatar
doncolga
Posts: 1967
Joined: Thu Jul 01, 2010 3:01 pm
Location: Statesboro, GA
Contact:

Measuring Mixer Output?

#1 Post by doncolga »

Hey all,

How would I go about measuring my mixer output?...it seems to have gotten really wimpy. I can crank up the gains and it barely lights up its own output meters or the DEQ 2496 which is next in the chain.

Thanks!

Donny
Donny Collins
Built:
Two 18" Tuba 30's 3012 LF
Two 26" Tuba 30's Lab 12
Two OmniTop 12's DL 2512 (Melded Array)
Presonus Studio One DAW
Harrison Consoles MixBus 32C DAW

User avatar
Bill Fitzmaurice
Site Admin
Posts: 28916
Joined: Tue May 02, 2006 5:59 pm

Re: Measuring Mixer Output?

#2 Post by Bill Fitzmaurice »

With a voltmeter. Use a sine wave input.

User avatar
SoundInMotionDJ
Posts: 1750
Joined: Thu Mar 15, 2007 1:31 pm
Location: DFW, Texas
Contact:

Re: Measuring Mixer Output?

#3 Post by SoundInMotionDJ »

doncolga wrote:How would I go about measuring my mixer output?...it seems to have gotten really wimpy. I can crank up the gains and it barely lights up its own output meters or the DEQ 2496 which is next in the chain.
The DEQ has a "pad" button on the back for the input. I forget the values, and it's in rack...but check that setting.

What is the input to the mixer? Are you sure that is producing a high enough signal. Headphone jacks rarely produce as high an output as say the "line out" on a CD player.

Does this happen with more than one input channel to the mixer?

Is the input to the mixer expecting a "phono", "line in", or "mic" signal level?

And use a sine wave, 1kHz is a handy frequency.
10 T39S + 10 DR200 + 1 T48

byacey
Posts: 947
Joined: Thu Jun 14, 2012 9:09 am
Location: Edmonton, Alberta, Canada

Re: Measuring Mixer Output?

#4 Post by byacey »

If it won't even indicate much on it's own meters, don't worry about the pad on the gear downstream from the mixer.

If it's an RCA connector output, usually it's anywhere from 200 to 317mv (0.317 volts) at 0db. XLR and usually (1/4") output is 0.775 to 1.5V measured between pins 2 and 3 (or tip and ring) of the connector at 0db.
Built
T48s
WH8s
SX212

User avatar
escapemcp
Posts: 1219
Joined: Thu Feb 07, 2013 8:57 pm
Location: Bristol, UK

Re: Measuring Mixer Output?

#5 Post by escapemcp »

SoundInMotionDJ wrote:The DEQ has a "pad" button on the back for the input. I forget the values, and it's in rack...but check that setting.
+12dBu or +22dBu (both MAX)
I've been deliberating which to use for ages. If you use the +22dBu in and want to use the aux out as a through line (no processing), the aux output is max +12dBu, so it distorts :wall:
If I use the +12, my mixer sends far too hot a signal and I can't expect DJs to keep it below -4dB :horse:

Donc - Check for dodgy leads? from your description it sounds like your mixer isn't getting a hot enough signal :|

byacey
Posts: 947
Joined: Thu Jun 14, 2012 9:09 am
Location: Edmonton, Alberta, Canada

Re: Measuring Mixer Output?

#6 Post by byacey »

On most mixers I've ever seen, the signal for metering is picked off before the final output buffer stages. Even with a shorted output connector the onboard meters should still read normal.
Built
T48s
WH8s
SX212

Post Reply