Output Limiters - DV Audio Promix 3 Operation Manual

C.

OUTPUT LIMITERS.

The limit threshold (activation level) is factory set at +2 on the meter. The limiters
compress the signal at approximately 2.7 to 1 ratio. This is to say an increase of
2.7dB in input signal will result in only a 1dB increase in output signal. Most video
cameras have limited audio track headroom and can easily be overloaded
resulting in distortion of the recorded audio. For this reason, the DV Promix 3
contains limiters that are controlled automatically for ease of use and will provide
and high quality recordings.
D. HEADPHONE OUTPUT
The Headphone output is located on the right side panel of the mixer. The DV
Promix 3 Mixer's headphone amplifier circuitry is designed to drive virtually any
headphone with an impedance rating of 32 to 600 Ohms.
circuitry is controlled by the use of a switch and a volume control that are
conveniently located on the front panel. The switch is used to control what the
operator listens to. It allows the operator to chose between monitoring "MIX" (the
audio that is present on the mixer's output) and "TAPE" audio that may be fed
back from the headphone jack of the camera ensuring that audio has made it to
the camera. This "TAPE" function is commonly called tape confidence
monitoring. It should be noted that many DV Cams are not equipped with Tape
Monitoring heads and thus do not provide a true tape monitor function. Even so,
the "Tape" monitor function on the DV ProMix 3 is still very useful as you can use
it to verify that your audio cabling between the DV ProMix 3 and your camera is
working and that your levels are properly matched.
mistakenly set your DV Promix 3 to line level outputs and then connected it to
your cameras microphone input, when monitoring "Tape" you would hear that the
audio coming back from the camera was severely distorted. This feature is
helpful when trouble shooting audio problems in the field. For more trouble
shooting tips, please see the trouble-shooting guide in the back of this manual or
in our "QUICK START GUIDE".
*SAFETY NOTE*
BEFORE PLUGGING IN YOUR HEADPHONES.
ALWAYS TURN DOWN THE HEADPHONE VOLUME
12
The headphone
For example, if you