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Auto Equalizing Balanced AES/EBU Distribution Amplifier

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The 7700DA-AESB is a five output DA with auto equalizing input and reclocking for 110Ω balanced AES signals. The DA will automatically equalize AES signals on Belden 1800B cable when the drive signal is 7V p-p. The DA will reclock data with sampling frequencies of 32kHz, 44.1kHz, 48kHz and 96kHz.

The 7700DA-AESB card edge LED indicators provide quick and accurate assessment of the incoming signal integrity. The 7700DA-AESB also provides a contact closure output that can be configured using on-board jumpers to assert when an input error condition exists.

The 7700DA-AESB occupies one card slot and can be housed in the 1RU 7801FR frame which holds up to four single or two dual slot modules, the 3RU 7800FR frame which has a 15 slot capacity, the portable 3RU 350FR frame which has a 7 slot capacity, or a standalone enclosure which holds a single module.


  • AES3-1992 standard for AES audio on 110Ω twisted pair cable
  • Transformer coupled 110Ω balanced input (selectable Hi-Z)
  • Data reclocking provides jitter reduction
  • Automatic equalization
  • EQ and reclock provide extended cable length compensation
  • Five 110Ω balanced outputs
  • Error LED indication for input PLL out of lock, parity error or biphase coding error
  • External indication of input error condition using contact closure output


AES Input

Standard AES3-1992
Connector 3-pin removable terminal strip
Number of Inputs 1
Input Level 2 to 7V p-p
Coupling Transformer
Input Impedance 110Ω (selectable Hi-Z)
Return Loss > 14dB 100kHz to 6MHz
Equalization Automatic to 300m with Belden
1800B (or equivalent) @ 48kHz AES signal
Sampling Frequency 32kHz, 44.1kHz, 48kHz and 96kHz

AES Output

Number of Outputs 5 per card Reclocked
Connector 3-pin removable terminal strip
Output Level 5V p-p
Output Impedance 110Ω
Return Loss 30dB 100kHz to 6MHz


Voltage +12V DC
Power 1.8 watts
EMI/RFI Complies with FCC Part 15, Class A
EU EMC Directive


Number of Slots 1

Ordering Information

7700DA-AESB Auto Equalizing Balanced AES/EBU Distribution Amplifier

Ordering Options

Notes Rear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+SA Standalone Enclosure Rear Plate
+3RU 3RU rear plate for use with 350FR, 7700FR-C, 7800FR or 7801FR Multiframes


350FR Portable Multiframe which holds 7 single slot modules
7700FR-C 3RU Multiframe which holds 15 single slot modules
7800FR 3RU Multiframe which holds 15 single slot modules
7801FR 1RU Multiframe which holds up to 4 single slot or 2 dual slot modules
S7701FR 7700 Series Standalone Enclosure