Audemat Audemat
FMX410

Hardware description 
Power requirements 115/230VAC 50/60Hz, IEC connector
Dimensions (W x H x D) 19" x 1U x 280mm
Front panel 1 RS232 port (COM0)
Rear panel 2 RS232 port (COM0 and COM1)
1 RS232/RS485 port (COM2)

RDS decoder 
  • Connected to an external FM RDS tunner, allows the rebroadcast of user-selected RDS groups
  • Allows control of the generated RDS signal
  • Can be used as an auxiliary RDS output for monitoring

I/O
Digital inputs: 8
Relay outputs: 4

Audio inputs
Analog inputs
  • 600 ohm  
  • XLR connectors
  • Balanced or unbalanced configuration
  • Nominal input level: configurable from -18dBu to +18dBu
  • 456 kHz oversampling at 24 bits, for absolute freedom from conversion artifacts
Digital input
  • AES-EBU interface
  • Other formats: accepts IEC958 and S/PDIF
  • XLR connector
  • Provides proper handling of 16-bit, 24-bit, or-32 bit input streams at up to 48 kHz sample rate. Signal is internally resampled to 456 kHz for processing.
  • Nominal input level: configurable from -10 dBfs to 0 dBfs
  • Automatic fallback to analog if the digital signal is interrupted


Audio processor 
Processing resolution:
24-bit
AGC (Automatic Gain Control)
 ±6dB around the average analog input level setting
Stereo effect enhancer
 effect adjustable from -90% to +90% (10% steps)
Multiplex power optimizer
 Adds up to +5dB of MPX power referenced to ±75kHz deviation by slightly increasing, when possible, the audio and/or the stereo power levels within the Multiplex deviation. Adjustable in 1 dB steps


Stereo encoder
Sampling Frequency
 456 KHz (multiple of 19KHz). Synchronized to 19KHz pilot tone, 57 and 76KHz subcarriers
Total harmonic distortion:
< 0.03% across full bandwidth
Stereo separation:
> 60 dB at 1 kHz
Digital low pass filter for each audio channel: < 86 dB attenuation at 16700 Hz (when the stop band is configured at 15kHz)
Ripple in the configured band: < 0.2dB when stop band is configured at 15kHz
Digital high pass filter for each audio channel: Ripple in the configured band: < 0.2dB when stop band is configured at 15kHz
38 kHz suppression: > 70dB
Pilot stability:
better than 0.5 Hz
Pilot synchronization:
selectable internal or external source
Pilot output
on BNC connector (SYNC output)
Test signals:
 L+R, L-R, Left Only, Right Only; for each of 3 audio frequencies


 RDS encoder 
Out-of-band rejection:
> 96 dB, 0 to 100 kHz
57 kHz suppression:
> 70dB
Level and phase  fully adjustable
Complies with CENELEC EN50067, supporting a full range of public messages and private data.  
RDS parameters Static: PI, PS, TP, TA, MS, PTY, DI, AF, Radio Text


 I/O
Auxiliary input Unbalanced, BNC connector (MPX in) for external synchronisation
Synchronisation Automatic pilot tone synchronisation
Phase Configurable digitally


Multiplex Clipper
  • Advanced mathematical predictive algorithm
  • Clipping limit: ajustable from 65 to 99KHz
  • Bypass feature


Analog Multiplex output
Nominal level configurable from -18dBu to +18dBu
Impedance
 50 ohms
Multiplex input to output gain
 software adjustable from -60 dB to +12 dB