The 7700ADA-AUD-MM Balanced Analog Audio Distribution Amplifier with Mono Mix is a general-purpose amplifier for distributing analog audio signals and providing a mono mix output of the stereo inputs. It can be operated with either differential or single ended inputs and offers a wide range of gain adjustment to handle a wide variety of input signals.

The 7700ADA-AUD-MM 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, or the portable 3RU 350FR frame which has a 7 slot capacity.

Features

  • Differential and single ended inputs (automatic single ended to differential conversion)
  • High impedance inputs
  • Low impedance outputs
  • Wide gain adjustment range
  • High common mode range and common mode rejection ratio
  • Very high SNR and very low THD+N
  • Mono Mix of the stereo input
  • Module Status/Local Fault

Specifications

Analog Audio Inputs
Standard Any analog audio signal
Number of Inputs 2 (Balanced or Single ended)
Connector 3-pin removable terminal strips
Maximum Input Level
0dB Input Gain +33dBu
+6dB Input Gain +28dBu
Noise Floor -87dBu (0dB input gain), -91dBu (+6dB input gain jumper setup)
Common Mode Rejection > 90dB @ 60Hz, 60dB @ 20kHz (tested with +28dBu CM input)
Common Mode Range
0dB Input Gain > ±22V
+6dB Input Gain > ±7V
Input Impedance 0dB Input Gain 33kΩ
+6dB Input Gain 15kΩ

Analog Audio Outputs
Number of Outputs
Distribution AmplifiEd Outputs 3 outputs each of left and right channels
Mono Mix Outputs 2 outputs total
Connectors 3-pin removable terminal strips
Maximum Output Level +28dBu across hi-impedance load
+24dBm into 600Ω load
Output Impedance 66Ω
Frequency Response ±0.02dB 20Hz to 20kHz
Stereo Phase Mismatch < 1°@ 20kHz
SNR
0dB Input Gain 115dB
+6dB Input Gain 119dB
THD+ Noise 0.001% 20Hz to 20kHz @ 28dBu, unweighted RMS
Intermodulation Distortion 0.001% - SMPTE @ 18dBu
Stereo Crosstalk > 115dB @ 1kHz, > 93dB @ 20kHz

Available Gains
Input Step Gain 0dB or +6dB (configurable with jumpers)
Fine Gain Control -5 to +5dB (card edge pot adjustable)
Output Step Gain 0, 3.5 or 9.5dB (configurable with jumpers)

Electrical
Voltage +12V DC
Power 12 watts
EMI/RFI Complies with FCC regulations for class A devices
Complies with EU EMC directive

Physical
Number of Slots 1

Ordering Information

7700ADA‑AUD‑MM Dual Channel Analog Audio Distribution Amplifier with Mono Mix

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

Enclosures
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 4 single slot modules