Manual-6
CASCADE IN PORT
The Cascade Input allows more mics to be added to the gain-
sharing mic mix algorithm of the AM1’s four Mic Inputs. When
a shielded Ethernet patch cable fed from an AM2 is connected
here, all cascaded AM2 microphones are automatically added to
the automatic Mic Mix of the AM1. (US Patent Pending.)
Cascade audio is 24-bit, 48 kHz, fixed-point for the curious
audio nerd.
To add more microphones to your system, use a Ethernet
patch cable to connect an AM2 CASCADE OUT port to the
AM1 CASCADE IN port. Doing so allows all 12 mixed micro-
phones (eight AM2 + four AM1) to be heard at the AM1’s Main,
Record, USB Audio and RAD Port Outputs.
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 AM1’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 AM1 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 – is always on when the AM1 is powered. If the
AM1 is powered and this is off, make sure the power twisted
pair in the connected cable is not shorted.
RAD PORT
The RAD Port contains a Rane-specific digital audio transport
protocol allowing audio delivery to and from a CobraNet™
digital audio network via a Rane Mongoose (sold separately).
The audio exiting the RAD Port contains the main mix and is
attenuated by the AM1’s front panel Output Level control. This
port can only be used to connect to a Rane Mongoose.
For inquisitive technophiles, RAD Port audio is 24-bit,
48 kHz, fixed-point.
RAD PORT Status indicators are defined below:
AUdIO TX
LED – lights green when communications with the
Mongoose has been established and the Mongoose is receiving
the AM1’s Tx audio. If this indicator is off, either the cable
is bad, or there is a communications error between the
Mongoose and AM1 RAD Port (see COMM LED below).
AUdIO RX
LED – lights green when the RAD Port successfully
receives audio from the Mongoose. If this indicator is off, you
may have a bad cable, or the Mongoose at the other end of the
cable is not powered or connected.
COMM
LED – lights green when communication is established
between the Mongoose and the AM1. This indicator turns off
if the RAD Port cannot communcate with the Mongoose for
some reason – most likely due to a faulty cable.
POWER
LED – lights green when the RAD Port is receiving 24
volt power from the Mongoose. This also indicates that the
twisted pair for power within the cable is wired and crimped
properly. If the Power LED is off and the other end of the
cable is plugged into a powered Mongoose, there is a problem
with the cable.
