MDX-1 SDI Audio Multiplexer/Demultiplexer

MDX-1 Freont View


The MDX-1 allows simple insertion and extraction of embedded AES/EBU digital audio within the SDI digital video signal. All four SDI audio groups are supported.

In Multiplex mode, the MDX-1 detects the two AES3 inputs and displays their associated sampling rates (32, 44.1, 48, or 96 kHz). These AES/EBU signals are automatically sample-rate converted as required, and embedded into the SDI signal.

In Demultiplex mode, the MDX-1 displays audio presence in the four channels of the active group. This audio is extracted and appears at the two AES3 outputs.

Features include AES/EBU mute, SDI audio mute, active group select, 2 SDI outputs, error indicators, 20 or 24 bit audio select, and serial RS-232/RS-422 remote control.


MDX-1 Specifications

Power Requirements115 VAC, 60 Hz or 230 VAC, 50 Hz

AES/EBU Digital Audio Inputs

Input ConnectorsXLR-3F, 2 total
Input Impedance110 ohms, transformer coupled
Input Signal Level0 to 5 V differential
Input Cable Length300 meters typical

AES/EBU Digital Audio Outputs

Output ConnectorsXLR-3M, 2 total
Output Impedance110 ohms, transformer coupled
Output Signal Level0 to 5 V differential
Output Cable Length200 meters typical

SDI Serial Video Inputs

Input ConnectorsBNC (1 input, 2 active loops), 3 total
StandardsSMPTE: 259M-A (143 Mb/s, NTSC)
259M-B (177 Mb/s, PAL)
259M-C (270 Mb/s, 4:2:2 component)
259M-D (360 Mb/s, 4:2:2, component)
Impedance75 Ohms
Return Loss> 18 dB to clock frequency
Signal Level800 mV +/- 10%
EqualizationAutomatic; >30 dB for SMPTE 259M-C (equal to 300m of Belden 8281 coaxial cable)

SDI Serial Video Outputs

Output ConnectorsBNC, 2 total
StandardsSMPTE: 259M-A (143 Mb/s, NTSC)
259M-B (177 Mb/s, PAL)
259M-C (270 Mb/s, 4:2:2 component)
259M-D (360 Mb/s, 4:2:2, component)
Impedance75 Ohms
Return Loss> 18 dB to clock frequency
Signal Level800 mV +/- 10%
Rise and Fall Time650 pS (20 to 80% amplitude)

Physical Dimensions (Inches)

MDX-119 W x 1.75 H x 8.5 D, EIA rack mounting

MDX-1 Rear View


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