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FM-531HD / May 2013
G E N E R A L I N F O R M A T I O N
Audio Inputs
The FM‑531HD 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;
• Optional WheatNet‑IP via 100BaseT Ethernet connection to a WheatNet‑IP audio
network.
Input audio can be applied to all inputs simultaneously.
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 ‑48dBFS).
Automatic failover from analog to AES3 is based on silence sense responding to audio
on both channels being below ‑48dBFS for more than 30 seconds.
Failover from AES3 to WheatNet‑IP (or vice versa) is not available.
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
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
SCA In – BNC
Pin 1 BNC 1 HI ‑ SCA 1 IN HI
Pin 2 BNC 1 SH ‑ SCA 1 IN SH
Pin 1 BNC 2 HI ‑ SCA 2 IN HI
Pin 2 BNC 2 SH ‑ SCA 2 IN SH
FM Audio Outputs
Output audio for the FM path is available as:
• Balanced analog left/right stereo, pre‑emphasized.
• Balanced analog left/right stereo, de‑emphasized according to pre‑emphasis in use.
• AES3 digital, either pre or post diversity delay, and/or de‑emphasized according to
pre‑emphasis in use.
• Balanced
line level composite stereo multiplex on male XLR connectors.
• Unbalanced composite stereo on two BNC female connectors.
• WheatNet‑IP audio network.
Summary of Contents for FM-531 HD
Page 2: ...Technical Manual Wheatstone Corporation May 2013 FM HD Digital Audio Processor FM 531hd...
Page 122: ...page A 2 FM 531HD May 2013 A P P E N D I C E S Appendix A General Specifications A 3 Contents...
Page 128: ...page A 8 FM 531HD May 2013 A P P E N D I C E S Appendix B FM 531HD GPI Interface A 9 Contents...
