DV Audio Promix 3 Operation Manual page 13

E. TAPE RETURN
The DV Promix 3 Mixer is equipped with a 3.5mm jack for use in monitoring tape
confidence heads from most any recording device. These tape monitor
amplifiers can be adjusted to match the signal levels of most any device. These
levels are adjusted using a small jewelers screwdriver (or "Greenie" screwdriver).
The adjustment points are located on the back panel of the mixer. The
tape/direct switch is located on the upper right hand corner of the front panel.
When set to "MIX" the phone amplifiers to monitor the mixers output signal. If
switched to "TAPE", then the phone amplifiers monitor the tape returns from the
camera. To properly adjust the tape return amplifiers, you must first connect a
tape return cable from your camera's headphone jack to the tape return jack on
the DV Promix 3. Then set the cameras headphone volume to a nominal value
(mid point). Next set the DV Promix 3's headphone Tape/Mix switch to Mix and
then speak in a normal volume into one of your microphones. Adjust that
microphones channel fader to get a nominal meter reading with peaks just
lighting the "0" meter segment. Now adjust the mixer's headphone volume
control until you have a proper volume level in your headphones while listening to
the microphone. When you switch the Tape/Mix switch to Tape, you should
adjust the tape return trim pots located on the rear panel of the mixer until you
get a similar volume to that of the "mix" setting. You may toggle the switch back
and forth between Tape and Mix while making these adjustments to ensure that
you have the same volume between the two settings. Now that this is calibrated,
you can monitor the audio coming back from the camera while you mix ensuring
that good quality audio is being recorded on your camera's tape.
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