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ADA102 CODEC

 

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ADA102  Coder / Decoder
Technical Specifications, version II

Coder / Decoder Mode

ADA102 is able to work as Coder or Decoder depending on the software loaded. The client is able to change this software from a PC or laptop.
Using non compressed PCM signals, ADA102 can work bidirectional (full duplex)


Analog Input / Output

Stereo balanced In / Outs  -10 to + 15 dBu input level, regulated by front panel level control
Max output level + 20 dBm over 600 ohms (at FSD level)
0 VU at meter: + 4 dBu out

Digital IN / Out

AES 3 professional balanced digital stereo IN / Out  Z=110 Ohms.
Full compatible S/PDif

Frequency Response

Analog: 30 - 15.000 Hz +/- 0,5 dB @ 192 kbps

Digital AES 3: 20 - 15.000 Hz +/- 0,1 dB @ 192 kbps

Distortion

Less than 0,01 % THD distortion, Analog or Digital @ 192 kbps
Typical AES 3: 0,005 % @ 192 kbps Total coder+Decoder

Noise

Dynamic Range > 70 dBA  @ 192 kbps as encoder
Dynamic Range > 80 dBA  @ 192 kbps as decoder
Dynamic range AES 3: > 90 dBA @ 192, Total Encoder + Decoder

Headroom

Safety level from 0 VU meter to Full Digital Scale:  15 dB
VU meter Level

Measures true peak level with a peak-hold system
Channel Separation

Better than 70 dB @ 1 kHz, Analog
Better than 90 dB  @ 1 kHz, Digital AES 3

Power supply

220-240V / 110 - 127 V 50 / 60 Hz, 15 VA

 


Digital Streaming & Control signals

Streaming connection


Standard RJ45 Ethernet connection TCP/IP


Standards supported


• MP3 Layer 1 (32, 44.1 and 48 kHz)
• MP3 Layer 2 (16, 22.05 and 24 kHz)
• G.711 (µLaw / A-Law 8 and 24 kHz sampling rate)
• 16bit PCM uncompressed (8,16,32,44.1 & 48 kHz)
   Full duplex (transmitting and receiving)
MONO Streaming: MPEG1/2 Layer 3, VBR (Fs: 48KHz):
72 76 80 88 96 112 144 160kbps
STEREO Streaming : MPEG1/2 Layer 3, VBR (Fs:48KHz):
88 96 104 120 144 160 176 192kbps

Protocols

IP standard based protocols; TCP/IP, UDP, HTTP, ICMP, SNMP
• Supports BootP, DHCP and Auto IP
It supports RTP for low latency


Latency (time delay)
ADA102 has a latency of only 50 - 100 mS
Variable Bit Rate (VBR) Encoding

The MP3 encoder uses Variable Bit rate Encoding (VBR) to
realize optimal compression of the audio data. The
setting of a fixed bit rate is replaced with setting a quality
level that preserves audio quality in critical sections
and enhances compression otherwise.
RS 232 port

Bidirectional serial port RS232 used for Audio Processor control from studios, RDS signal control or Transmitter remote control
Supports all speeds up to 96 Kbits/s

4 channels remote control lines
Used for switch on-off transmitter, change to Day-night power, change antenna array, etc.
Four On-Off lines, 2 relay outputs (120 V - 1 A) and 2 open collector outputs (up to 24 V / 0,25 A )
In/Outs using D-15 female connector
Emergency Radio Program
In case of Internet streaming interruption, ADA102 starts to reproduce a pre-recorded radio program. The user must record it on a Pen Drive, using MP3 format. The Emergency Radio Program could be only music or a complete program several hours long.
   

 

Total Delay of two ADA102 units

ADA102 connected to a standard Ethernet LAN of 100 Mbits/sec



Type of use
Speed Kbits/sec

DELAY
(analog or AES) Milliseconds

Comments
uLaw MONO
64
60-90
Use only for return voice to remote journalist
MPEG1 Stereo
118 - 192
150
For high quality STL link using Internet
MPEG 2 Stereo
80 - 130
250
For STL link using Internet with reduced wide band
PCM 32 Khz Stereo
1.024
40
Recommended for high quality FM link between studios or STL link connected with fiber optic

Delay using 5,8 GHz microwave 802.11 link

PCM 48.1 kHz Stereo
1.411
30 - 50
Delay of ADA102 is less than 5 mS. Using 20 mS buffer total delay is < 30 mS



MPX output specifications model ADA102mpx

MPX Output

Differential output, BNC connector, floating ground 50 ohms
Allows 45 dB canceling buzz & noise due to ground loops
Level:
Adjusted 0,5 to 4 Vpp from rear panel preset

Total Distortion THD less than 0.003 % at 1 kHz.
Stereo Separation 75 dB at 400 Hz / > 70 dB; 30-15.000 Hz.
38 kHz Suppression 75 dB minimum below 100% modulation.
57, 76 and 95 kHz Suppression 75 dB minimum below 100% modulation.
Pilot Level Adjusted 7-12 % from rear panel preset control
Pilot Stability +/- 0.05 Hz, 0 to 50 °C.