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- MPEG Layer II, Layer III, G.722 and ADPCM
- ITU-T J52-compliant algorithm
- 2, 4 and 6B channel operation
- Mono, stereo, joint stereo and dual mono modes
- Full duplex operation
- AES/EBU option
- Auxiliary data channel
- Bit rates up to 384 kbps
- Remote supervision software available
- Universal power supply
- 19" rackmount
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Audio
- Audio Interfaces
Analog
- symmetrical, transformer isolated.
- maximum level: 21 dBu/dBm
- input Impedance: 600 Ohms or 10 k Ohms.
- output impedance: < 100 Ohms
Digital
- AES/EBU format
- Impedance: 110 Ohms
- Sampling frequency: 32, 48 kHz
or synchronised on AES input
- Headphone
- 1/4" jack, adjustable output, 25 Ohm
- Audio Performances
Bandwidth
- from 20 Hz to7 kHz (FS=16 kHz),
10 kHz (FS=24 kHz),
15 kHz (FS= 32 kHz),
20 kHz (FS= 48kHz)
THD + N < -80dB (0.01%) (1)(2)(3)
Stereo :
- channel separation > 80 (1)
- gain difference < 0.3 dB (1)
- phase difference < 3° (1)
Notes
1 : over the full 20 Hz to 20 kHz bandwidth.
2 : direct connection from the A/D D/A converter
3 : input/output 1 dB below clipping level |
Operational information
- Dialing
- Built-in keypad
- Automatic answering
User Interface
- Backlit LCD display: 2 x 16 characters
- Dust/breakage-free Lexan® keypad
- LEDs
- Audio input level, 18 LEDs for: 0 to -27 dB
(referenced to the clipping level = 16 dBu)
- Int voltage alarm: 12V & 5V
- Ext test alarm
- Ext clock alarm
- Network interface
- ISDN: U, S/T single basic rate interface (RJ45)
- V24 (sub D-9)
- General
- Loopback mode for network testing
- Universal power supply: 85 to 260 VAC
- Dimensions: 3.75 x 19 x 12.5 in. (H x W x D)
- Weight: < 13 lbs
- Operating temp range: 32°F to 113°F, 95% humidity
Specifications and features are subject to change without notice.
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What is J52?
Normally, if a field codec attempts to communicate via MPEG Layer II with a station codec set for Layer III, the algorithms are incompatible and there will be no connection. However, thanks to J52 - a mode that only ATA Audio includes as standard on all of its products - the station codec set for Layer III will recognize the incoming algorithm and automatically default backto Layer II operation in order to communicate. The beauty of J52 is that it requires absolutely no operator intervention. No longer do you have to manually change the algorithm, and never again will you miss an incoming signal because of an incompatibility
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| Coding |
Channel
mode |
Coding
frequency Fc |
Bandwidth |
Bit rate |
FEC
mode |
Data
channel |
Auxillary
Audio |
| G722 H221 |
M |
16 |
7 |
64k |
- |
300-4800 |
- |
| G722 H221 |
DM |
16 |
7 |
2x64k |
- |
300-4800 |
- |
| G722 SRT |
M |
16 |
7 |
64k |
- |
- |
- |
| G722 SRT |
DM |
16 |
7 |
2x64k |
- |
|
- |
| 4SB ADPCM |
M |
32 |
15 |
28k |
- |
300-4800 |
x |
| 4SB ADPCM |
S |
32 |
15 |
256k |
- |
300-4800 |
x |
| MPEG Layer II |
M |
16 |
7 to 20 |
64k |
0 to 3 |
300-9600 |
x |
|
DM |
24 |
7 to 20 |
128k |
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S |
32 |
7 to 20 |
192k |
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JS |
48 |
7 to 20 |
256k |
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320k |
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348k |
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| MPEG Layer III |
M |
32 |
15 to 20 |
64k |
0 ,2,3 |
300-9600 |
x |
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DM |
48 |
15 to 20 |
128k |
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S |
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15 to 20 |
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JS |
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15 to 20 |
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| TDAC |
M |
32 |
15 |
64k |
- |
300 |
- |
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