75-Ohm (Unbalanced) 4-Channel Analog-To-2-Pair AES Audio Converter with Remote Gain Control

Product by: Cobalt Digital

  • Overview
  • Flow Diagrams
  • Rear Module

The 9930ADC-AES75-RG 75-Ohm (Unbalanced) 4-Channel Analog-To-2-Pair AES Audio Converter with Remote Gain Control is a broadcast-quality Analog-To-Digital Converter (ADC) that converts four professional-level balanced analog audio inputs to a pair of AES-3id outputs. Each AES output is available over a 2x1 distribution amplifier.

The 9930ADC-AES75-RG supports audio sampling frequencies from 32kHz to 96kHz using AES (DARS) reference, video black reference, or 48kHz internal reference (the AES sampling rate is determined by the reference selected). The 9930ADC-AES75-RG supports full 24 dBu input levels for outputs up to 0 dBFS digital.

A built-in DSP allows mono-mix and L/R-only outputs. Input sensitivity trim for both pairs of analog inputs allows the input ADC to be tailored to professional as well as consumer levels, thereby maximizing ADC performance for any input level.

The space-saving design and very low power consumption of the 9930ADC-AES75-RG provides for high density installation.


  • High-density design accommodates two analog input pairs

  • 2x1 DA outputs provided for each AES output

  • Full remote control of operating mode and input sensitivity control

  • Multiple DSP modes – stereo/pass-thru, mono mix, L/R only outputs

  • Supports audio sampling frequencies from 32 kHz to 96 kHz

  • Convenient input sensitivity trim optimizes ADC performance for various input levels. Control available via DIP or remote control

  • Selectable card switch control or DashBoard™ remote control (usable with DashBoard™ and Cobalt OGCP-9000 remote control panels)

  • Five year warranty


< 3.8 Watts

Analog Audio Inputs
Number of Inputs: (4; 2 stereo pairs), balanced
Impedance: >20 kΩ
Nominal Input Level: +4 dB
Connector Type: WECO® 3-pin removable

Reference Input
Signal (from frame): REF 1, REF 2 supplying AES3-id, DARS, or Video Black ref
Internal Reference: 48 kHz

Quantization: 24-bit
Frequency Response: ±0.5 dB (20 Hz to 20 kHz)
Jitter: <5 ns
S/N: -114 dB unweighted
S/N (at –20 dBFS): -118 dB (“A” weighted)
THD+N: <-110 dB (0.002%)
Separation: >100 dB

AES Outputs
Number of Outputs: (4; two 1x2 DA), unbalanced AES-3id BNC (available as stereo, pass-thru, mono-mixed, or L/R only)
Impedance: 75 Ω
Return Loss: -25 dB
Sample Freq. Range: 32 kHz to 69 kHz (per ref received)
Rise/Fall Times: 30 ns
Output Level: 1.0 Vp-p ±10%

Ordering Information

9930ADC-AES75-RG  75-Ohm (Unbalanced) 4-Channel Analog-To-2-Pair AES Audio Converter with Remote Gain Control

RM20-9930ADC75-B  20-Slot Frame Rear I/O Module (Standard Width) (4) Balanced Analog Audio In, (4) AES Audio Out BNCs (two 2x1 DA)

Questions about this Product?

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Phone: 217-344-1243
Email: sales@cobaltdigital.com
2506 Galen Drive, Champaign, IL 61821