The MSA6800+A4B2D/+A4C2D series of analog audio multiplexers for the 6800+™ core processing platform accept an SDI input and embeds four channels of analog audio into the SDI signal. Each module provides one SDI output containing the embedded audio, plus two AES outputs, balanced or unbalanced (coaxial), depending upon module version.
The input to the embedder can be selected from any of the analog audio inputs, providing full flexibility in defining the mix or sum of audio embedded into the SDI output, as well as supplied on the additional AES outputs. The configurations of the audio into the embedder and the audio to the AES outputs are independently set and can be different.
The modules provide audio synchronization when used with 6800+ video synchronizer modules. When the data I/O signal is externally connected between the modules, it automatically delays the audio to match the video delay.
Part of the 6800+ frame, MSA6800+ modules can be controlled manually via card-edge controls, or controlled and monitored via the CSS Navigator™ software application, HTTP web browser, NUCLEUS™ hardware control panels or third-party SNMP-based control applications.


Block Diagram

Back Modules
| MSA6800+A4B2 | MSA6800+A4C2 |
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Specifications and designs are subject to change without notice.
| SDI Input | |
| Number | 1 |
| Standards | SMPTE 259M-C, 270 Mb/s, 525/625 component |
| Quantization | 10-bit |
| Return Loss | >18 dB to 270 MHz |
| SDI Output | |
| Number | 1 |
| Standards | SMPTE 259M-C, 270 Mb/s, 525/625 component |
| Quantization | 10-bit |
| Return Loss | >18 dB to 270 MHz |
| Analog Audio Inputs | |
| Number | 4 |
| Connector | 3-pin connector, male |
| Analog Input Level | 28 to 16 dBu (2 dB increments) |
| Impedance | 600 ohms/100 k ohms AC coupled |
| CMRR | >80 dB @ 60 Hz |
| THD | >100 dB @ 27 dBu |
| Noise Floor | >100 dB |
| Balanced AES Outputs | |
| Number | 2 |
| Connector | 3-pin connector, male |
| Impedance | 110 ohms ±20% (0.1 to 6 MHz) |
| Signal Level | 2 to 7 V pk-pk |
| Unbalanced AES Output | |
| Number | 2 |
| Connector | BNC (IEC 169-8) |
| Impedance | 75 ohms |
| Return Loss | >25 dB, 0.1 to 6.0 MHz |
| Signal Level | 1 V ±10% |
| Balanced DARS Input | |
| Connector | 3-pin connector, male |
| Sensitivity | <200 mV |
| Impedance | 110 ohms ±20% (0.1 to 6 MHz) |
| Maximum Input Signal | 10 V pk-pk |
| Common Mode Rejection | 0 to 7 V (0 to 20 kHz) |
| Unbalanced DARS Input | |
| Connector | BNC (IEC 169-8) |
| Impedance | 75 ohms |
| Return Loss | >25 dB, 0.1 to 6.0 MHz |
| Sensitivity | <100 mV |
| Power Consumption | MSA6800+A4B2D: 9.2 W
MSA6800+A4C2D: 9.0 W |
| MSA6800+A4B2D | 4-channel analog audio embedder with synchronizer, balanced AES outputs and double-slot rear connector for FR6802+ series frame |
| MSA6800+A4C2D | 4-channel analog audio embedder with synchronizer, coaxial AES outputs and double-slot rear connector for FR6802+ series frame |