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Auto Equalizing Unbalanced AES/EBU Distribution Amplifier (1x5)

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The 7700DA-AESU is a five output reclocking and auto equalizing DA for 75Ω unbalanced AES signals. The DA will automatically equalize AES signals on Belden 1694A coax to 1500m. The DA will reclock data with sampling frequencies of 32kHz, 44.1kHz, 48kHz and 96kHz.

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

The 7700DA-AESU 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.


  • SMPTE 276M standard for AES audio on 75Ω coax
  • Transformer coupled 75Ω unbalanced input (selectable Hi-Z)
  • Data reclocking provides jitter reduction
  • Automatic equalization
  • EQ and reclock provide extended cable length compensation (> 1500m)
  • Five 75Ω coax 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 SMPTE 276M
Number of Inputs 1
Connector BNC per IEC 61169-8 Annex A
Input Level 1V p-p
Coupling Transformer
Input Impedance 75Ω (Selectable Hi-Z)
Return Loss > 25dB at 100kHz to 6MHz
Equalization Automatic to 1500m with Belden 1694A (or equivalent) @ 48kHz AES signal
Sampling Frequency 32kHz, 44.1kHz, 48kHz and 96kHz

AES Output

Number of Outputs 5 per card reclocked
Connector BNC per IEC 61169-8 Annex A
Output Level 1V p-p
Output Impedance 75Ω
Return Loss > 25dB 100kHz to 6MHz


Voltage +12V DC
Power 1.2 watts
EMI/RFI Complies with FCC Part 15, Class A
EU EMC Directive


Number of Slots 1

Ordering Information

7700DA-AESU Auto Equalizing Unbalanced AES/EBU Distribution Amplifier (1x5)

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