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4
ProMix 12 Installation and Operation Manual
INSTALLATION
Unbalanced sources: TIP:
Hi (or “hot” lead)
RING:
(leave unconnected)
SLEEVE:
Ground (or shield)
Balanced sources:
TIP:
Hi
RING:
Lo
SLEEVE:
Ground
Note:
The console terminates the Lo input to ground via a 1K resistor. In some
cases, connecting the Lo audio lead to Ground will produce a slightly higher audio
level. However, check the manual of the source equipment to be certain grounding
the Lo output lead will not cause damage. It is generally OK to do so on older trans-
former-coupled outputs; active (transformerless) outputs may or may not permit this.
USING A TELEPHONE HYBRID
If the console will be interfaced to a telephone hybrid (for broadcasting telephone
calls), the Receive (“caller”) output of the hybrid should be fed into Channel 4. This
is because the Mix Minus output of the console contains ALL line sources mixed to
the Program bus, except for Channel 4. The” Program-minus-caller” Mix Minus
output is normally fed back to the hybrid’s send input. The caller will therefore be
able to hear all program sources mixed on the Program bus, minus him.
AIR MONITOR INPUT
The console provides a Monitor Air input (4) that can be used to feed an off-air mon-
itor into the console’s Monitor system. This input is electrically identical to the
other Line channel inputs, and should be connected the same way. Any tuner or
demodulator can be used.
MAIN MIX BUS OUTPUTS
The console’s six main mixing bus outputs appear on male XLR connectors (5). All
outputs are electronically balanced; each will drive a 600-ohm load. The nominal
level is +4dBm. Connect as follows:
PIN 1: Ground
PIN 2: Hi
PIN 3: Lo
Note:
To feed an unbalanced load, connect to Pins 1 & 2 only. DO NOT SHORT
PIN 3 TO GROUND.
It is not necessary to terminate any console outputs.
MONITOR OUTPUT
The console’s Monitor outputs (6) are via a TRS jack. These outputs are unbal-
anced, and will drive 600-ohm loads. (Termination is not necessary.) The nominal
level is –10dBm. Connect the mating TRS plug as follows:
TIP:
Left Monitor output
RING:
Right Monitor output
SLEEVE
Ground
