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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
Rear Panel Connections
The image below shows the rear panel of the AM-55 and the location of various
connectors associated with an installation
Audio Inputs
The AM-55 accepts three types of audio input sources:
• Balanced analog line level left/right audio;
• Digital AES3 compliant left/right audio with sample rates between 32kHz and 96kHz;
• WheatNet-IP via 100BaseT Ethernet connection to a WheatNet-IP audio network.
Input audio can be applied to any or all inputs simultaneously with the caveat that
the WheatNet-IP input and AES3 inputs share a common digital path into the internal
processing.
Automatic audio failover from analog to digital or vice versa is supported. Automatic
failover from AES3 or WheatNet-IP to analog is instantaneous and based on invalid or
missing bits in the AES3 or WheatNet-IP stream, or after 30 seconds of “silence” (level
below -42dBFS).
Automatic failover from analog to AES3 or WheatNet-IP is based on silence sense
responding to audio being below -42dBFS for more than 30 seconds.
Failover capability is not available between the AES and WheatNet-IP inputs.
Analog In – XLR-F
Pin 1 XLR LT SH – LINE LT IN SH
Pin 2 XLR LT HI – LINE LT IN HI
Pin 3 XLR LT LO – LINE LT IN LO
CONNECTOR
TYPE
FUNCTION & NOTES
1
XLR Female Left Analog Input
2
XLR Female Right Analog Input
3
XLR Male
TX Output #1
4
XLR Male
TX Output #12
5
XLR Female
AES Audio Input
6
XLR Male
AES Audio Output
7
RJ-45
GPI Interface
8
RJ-45
Ethernet (Network) Connection / WheatNet-IP audio connection
9
IEC
Mains connection (90-240~VAC / 50-60Hz)
AM‑55 Rear Panel Connections (left to right)
