Rane AM2 AUTOMIXER Guia Del Usuario página 8

Operation
Mic Inputs
The rear panel, three position switch sets the appropriate gain for condenser, dynamic and wireless
microphones as well as selecting phantom power for condenser microphones. The Mic Inputs are
automatically mixed using a gain-sharing algorithm. Set the inputs using the black knobs so they do
not (or rarely) clip. Then, sit back and relax. If you've already set up the inputs and someone starts
talking louder/closer than you expected, feel free to turn them down a little.
The green Signal indicators should easily light for soft talkers even at relatively low Level settings. The
Overload indicator should light only occasionally for only the loudest talkers.
Since these Mic Inputs and their underlying gain-sharing automix algorithm are designed and
optimized for speech signals, do not use these Inputs with non-speech audio signals such as those
from musical instruments or CD/DVD players.
Main Output
The Main Output of an AM2 delivers the gain-sharing automix of its Mic Inputs and all upstream inputs.
The gray Output Level control knob always adjusts the level of the Main Output. Remember, if
multiple AM2s are daisy-chained together (using Cascade In / Out ports), the automatic mix of all
microphones in the system is present at the Main Output of the last AM2 in the daisy-chain.
Cascade In Port
The Cascade Input allows more mics to be added to the gain-sharing mic mix algorithm of the AM2's
eight Mic Inputs. When a shielded Ethernet patch cable fed from another AM2's Cascade Out port is
connected to the next AM2's Cascade In port, all cascaded AM2 microphones are automatically
added to the automatic Mic Mix of the last AM2 in the chain. (US Patent Pending.)
Cascade audio is 24-bit, 48 kHz, fixed-point for the curious audio nerd.
When all four Cascade Status indicators light, this means the cable is wired properly. If any of the
Status indicators are flashing, the cable is not wired properly or damaged. In this case, perhaps an
Ethernet crossover cable was accidentally connected, or the cable crimp has an error.
We recommend using shielded twisted-pair for the best EMI performance.
Cascade In Status Indicators are defined below:
• Audio TX LED: Lights when the AM2's audio is successfully transmitted to, and received by, the
AM2. If this is off, check the cable.
• Audio RX LED: Lights when the connected AM2 successfully sends audio which also proves this
twist in the cable is correct.
• Comm LED: Lights green when the AM2's Cascade Out is properly communicating with the other
AM2 and proves that the twisted pair for Comm in the cable is good. If this indicator is off, the
cable is not a happy camper.
• Power LED: Always on when the AM2 is powered. If the AM2 is powered and this is off, make
sure the power twisted pair in the connected cable is not shorted.
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