Audemat Audemat
FMX480

Hardware description

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

I/O

Auxiliary input Unbalanced, BNC connector (MPX in) for external synchronisation
Synchronisation Automatic pilot tone synchronization
Phase Configurable digitally
Digital inputs 8
Relay outputs 4

Audio inputs

Analog input
  • 600 ohms
  • 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 in respect of 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
Dynamic
 TMC (Traffic Message Channel)
Paging
IH (In House)
EON (Enhanced Other Network)
ODA (Open Data Application)
TDC (Transparent Data Channel)
EWS (Emergency Warning System)


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


Network and communication features

Filing system
  • Management of the internal software with updating via the network connection
  • Management of the configuration in the form of a configuration file
  • Execution of commands appearing in a command file
  • Access to files via the console port or in Telnet, FTP or http connections
  • Configuration of the file attributes allowing accesses to be allowed or protected
  • Available flash memory space: 4Mb
Web server (HTTP server)
  • Multi-client (5)
  • Hosting of on-board HTML pages accessible with a simple Web browser
  • Compatible with any type of file associated with HTML pages (PDF, JPG, GIF, MP3, ...)
  • JAVA, JavaScript, VBscript, ActiveX compatible
  • CGI compatible: the HTML pages accept forms or entry fields to interact with the system and the connected equipment
  • Supports PROXY functions to make HTML pages more dynamic, displaying the values of the parameters collected on the system by command overlay
  • Update via FTP
  • Access protection to CGI and pages (public and private modes)
FTP server
  • Multi-client (5)
  • Fully compatible with the FTP protocol and the various FTP clients on the market
  • Management of the files and the directories of the filing system
  • Update of the embedded Web server
  • Update of the equipment's internal programs
  • Several levels of access rights
TELNET server
  • Multi-client (5)
  • Mainly for configuration
  • Used for the NETCOM function
SNMP agent (MIB II, SNMP v1)
  • PROXY agent function to administer your equipment
  • Sending of SNMP traps on programmable events
  • Standard and manufacturer MIB
SMTP mail client Automatic sending of E-Mails on occurrence of events
History file
  • Creates a time and date stamped history log of internal events (operating system) and external events (behaviour and failure of the connected equipment : power fault, connection actions)
  • File generated in TXT and HTML format
Event handler
  • Triggering of pre-programmed actions on internal or external events:
    • Execution of scripts
    • Sending of E-MAIL
    • Sending of SNMP Traps
    • Adding of lines in the history log
  • Sending of events and history files to a server:
    • E-MAIL as SMTP client
    • FTP append as FTP client
    • SNMP Traps
  • Programmable timers
Security
  • Ten users and three levels of access protected by password