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FM-55 / Aug 2014
G E N E R A L I N F O R M A T I O N
Pin 1 XLR RT SH – LINE RT IN SH
Pin 2 XLR RT HI – LINE RT IN HI
Pin 3 XLR RT LO – LINE RT IN LO
AES In – XLR-F
Pin 1 XLR SH – AES IN SH
Pin 2 XLR HI – AES IN HI
Pin 3 XLR LO – AES IN LO
AM Audio Outputs
Output audio for the AM path is available as:
• Balanced analog mono (TX1 or TX2), bandwidth limited and pre-emphasized.
• AES3 digital mono (TX1 or TX2), bandwidth limited and pre-emphasized.
• WheatNet-IP audio network.
TX Out – XLR-M
Pin 1 XLR 1 SH – TX 1 OUT SH
Pin 2 XLR 1 HI – TX 1 OUT HI
Pin 3 XLR 1 LO – TX 1 OUT LO
Pin 1 XLR 2 SH – TX 2 OUT SH
Pin 2 XLR 2 HI – TX 2 OUT HI
Pin 3 XLR 2 LO – TX 2 OUT LO
AES Out – XLR-M
Pin 1 XLR SH – AES OUT SH
Pin 2 XLR HI – AES OUT HI
Pin 3 XLR LO – AES OUT LO
Headphone Monitoring
An overload protected stereo headphone amplifier drives the front panel ¼" stereo
headphone output located on the left side of the AM-55’s front panel. The audio source
feeding the headphones may be chosen from the AM output or the analog and digital
inputs, even if those inputs have not been selected to feed the audio processing chain.
The System menu of the GUI hosts the headphone router selector as does the front panel
interface.
Network Connection
The AM-55 can connect to a network or PC/laptop over Wired Ethernet via the
100Base-T Ethernet port on the rear panel. This port is completely independent and Auto-
MDIX, allowing it to support straight-through and crossover cables in any combination.
The wired Ethernet interface can support up to four simultaneous connections to remote
GUIs.
For typical CAT5 cable pinouts see below. These connections are for communicating
with the configuration computer via a network.
