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The 7720AE4 Audio Embedder inserts AES audio signals into a 270Mb/s SDI video signal as specified in SMPTE ST 272. The companion 7720AD4 Audio Deembedder facilitates audio demultiplexing at the destination.
SMPTE ST 272 allocates four groups of four audio channels that can be embedded into the SMPTE ST 259 bitstream. The 7720AE4 embeds up to 4 AES audio signals into two groups on the SDI outputs for discrete 5.1 audio applications. The 7720AE4 is Dolby E compliant when the sample rate converters are turned off.
VistaLINK® enables control and configuration capabilities via Simple Network Management Protocol (SNMP). This offers the flexibility to manage the module status monitoring and configuration from SNMP enabled control systems such as Evertz VistaLINK® PRO locally or remotely.
Features
- Automatic detection of 525 line and 625 line input
- Bypass relay protection on one SDI output for power failures
- 20-bit AES input and audio embedding
- Individual audio group assignment for each group
- Group lock mode maintains phase relationship between the groups for 5.1 audio applications
- Sample rate conversion disable on AES inputs to permit Dolby E® embedding
- Programmable audio delays (up to 7 frames in ½ video field increments using DIP switches or up to 1.35 seconds in 1 sample increments with VistaLINK® control
- Ancillary packet cleaning mode removes all audio before embedding
- Ancillary packet reformatting mode left justifies and removes unused packets before embedding
- Embeds audio on internally generated black or blue video when there is no video input
- Card edge LEDs indicate video and audio signal presence, and module fault
- VistaLINK® capable for remote monitoring, control and configuration capabilities via SNMP; using VistaLINK® PRO, CP-2116E or CP-2232E Control Panels. VistaLINK® is available when modules are used with the 3RU 7800FR frame and a 7800FC VistaLINK® Frame Controller module in slot 1 of the frame
Specifications
Serial Video Input | |
|---|---|
| Standard | SMPTE ST 259-C (270Mb/s) 525 or 625 line component |
| Number of Inputs | 1 |
| Connector | BNC per IEC 61169-8 Annex A |
| Equalization | Automatic 210m @ 270Mb/s with Belden 8281 or equivalent cable |
| Return Loss | > 15dB up to 540Mb/s |
Serial Video Output | |
|---|---|
| Standard | Same as input |
| Number of Outputs | 2 (1 bypass relay protected) |
| Connector | BNC per IEC 61169-8 Annex A |
| Embedded Audio | |
| Standard | SMPTE ST 272 |
| Resolution | 20 bits |
| Sampling Rate | 48 KHz synchronous |
| Signal Level | 800mV nominal |
| DC Offset | 0V ±0.5V |
| Rise/Fall Time | 900ps nominal |
| Overshoot | < 10% of amplitude |
| Return Loss | > 15dB up to 270Mb/s |
| Wideband Jitter | < 0.2UI |
AES Audio Input | |
|---|---|
| Standard | SMPTE ST 276, single ended AES |
| Number of Inputs | 4 |
| Connector | BNC per IEC 61169-8 Annex A |
| Resolution | 20 bits |
| Sampling Rate | 32kHz to 96kHz synchronous or asynchronous 48kHz synchronous AES required when sample rate converter is disabled |
| Impedance | 75Ω unbalanced |
| Level | 1V p-p ±0.1V |
System Performance | |
|---|---|
| Embedding Latency | 1.3ms to 3ms |
| Audio Delay | |
| DIP Switch Control | Up to 7 frames, ½ frame increments (delay applied to all AES channels) |
| VistaLINK or Serial Port Control | Up to 1.35s in 1 sample increments (independent control of delay for each channel) |
Electrical | |
|---|---|
| Voltage | +12V DC |
| Power | 9 Watts |
| EMI/RFI | Complies with FCC Part 15 Class A, EU EMC Directive |
Physical | |
|---|---|
| Number of Slots | 1 |
Ordering Information
| 7720AE4 | SD-SDI 4 AES Audio Embedder |
|---|
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 or 7800FR 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 |
| S7701FR | 7700 Series Standalone Enclosure |
Accessories | |
|---|---|
| 7800FC | VistaLINK® Frame Controller |
| CP-2116E-H | System Control Panel, One Touchscreen LCD and 16 LCD Buttons |
| CP-2232E | System Control Panel, 2RU, Two Touchscreen LCDs and 32 LCD Buttons |