Evertz - 7720AD-A4-2, 7720AD4, 7720AD4-B & 7720AD-B-A4-LTC

7720AD-A4-2, 7720AD4, 7720AD4-B & 7720AD-B-A4-LTC

SD-SDI AES Audio De-embedder

The 7720AD4 series Audio De-Embedders extract embedded audio as specified by SMPTE ST 272 from a 270Mb/s serial digital video signal. The companion 7720AE4 Audio Embedder facilitates audio multiplexing at the source. The 7720AD4 is available in 4 different versions.

SMPTE ST 272 allows for up to four groups (4 channels/group) to be embedded within a serial digital signal. The 7720AD4 can de-embed two audio groups onto four unbalanced AES outputs. The 7720AD4-B can de-embed two audio groups onto four balanced AES outputs. The 7720AD-A4-2 can de-embed one audio group onto two unbalanced AES outputs and 4 balanced analog audio outputs. The 7720AD-B-A4-LTC can de-embed one audio group onto two balanced AES outputs and 4 balanced analog audio outputs and can also be used as a VITC to LTC translator.

Features

Card edge LEDs indicating module status, video presence, selected audio group data is present
LED indication for the presence of each of the 4 audio groups within the input video
Audio group selection via card edge DIP switches
Audio channel swapping selection via card edge DIP switches (not on 7720AD-A4-2)
Analog audio output models have independent volume controls for each of the audio channel outputs

- 7720AD-B-A4-LTC has 4 balanced audio outputs or 3 audio outputs and one VITC to LTC translator output - selection of VITC reader line
- VistaLINK® capable for remote monitoring via SNMP (using VistaLINK® PRO) when installed in 7800FR frame with a 7700FC VistaLINK® Frame Controller

Output Organization

Model	Audio Outputs		Video 270Mb/s SDI Reclocked Outputs	VistaLINK® Enabled
Model	AES	Analog	Video 270Mb/s SDI Reclocked Outputs	VistaLINK® Enabled
7720AD-A4-2	–	4	2
7720AD-B-A4-LTC	2 Balanced	3 +LTC or 4	–	–
7720AD4	4 Unbalanced	–	2
7720AD4-B	4 Balanced	–	1

Block Diagram

Specifications

Serial Video Input
Standard	SMPTE ST 259-C - 525 or 625 component
Number of Inputs	1
Connector	BNC per IEC 61169-8 Annex A
Equalization	Automatic 300m @ 270Mb/s with Belden 8281 (or equivalent)
Return Loss	> 13dB up to 540Mb/s

Serial Video Output
Standard	Same as input
Number of Outputs	2 reclocked (7720AD4) or 1 reclocked (7720AD4-B) or None
Connector	BNC per IEC 61169-8 Annex A
Signal Level	800mV nominal
DC Offset	0V ±0.5V
Rise/Fall Time	700ps nominal
Overshoot	< 10% of amplitude
Wideband Jitter	< 0.2UI

AES Audio Output
Standard
Balanced (-B)	AES3-1992
Unbalanced	SMPTE ST 276, single ended synchronous AES
Number of Outputs
Balanced (-B)	2 (7720AD-B-A4-LTC) or 4 (7720AD4-B)
Unbalanced	4 (7720AD4)
Connector
Balanced (-B)	Terminal strip
Unbalanced	BNC per IEC 61169-8 Annex A
Sampling Rate	48KHz
Impedance
Balanced (-B)	110Ω
Unbalanced	75Ω
Dynamic Range	20 bit

Analog Audio OutputA4 Versions
Type	Balanced analog audio
Number of Outputs	4
Connector	Terminal strip
Impedance	66Ω balanced
Sampling Rate	48KHz
Signal Level	0dB FS =>8dBu to 24dBu into 10kΩ loads (user settable) 0dB FS =>8dBu to 22dBu into 600Ω loads (user settable)
Frequency Response	< ±0.1dB, 20Hz to 15kHz
THD+N	> 90dB RMS @ 1kHz, with 24dBu output > 100dB RMS @ 20Hz to 20kHz, with 24dBu output
Crosstalk Isolation	> 100dB RMS, 20Hz to 20kHz

Electrical
Voltage	+12V DC
Power	12 Watts
EMI/RFI	Complies with FCC Part 15 Class A, EU EMC Directive

Physical
Number of Slots	1

Ordering Information

7720AD-A4-2	SD-SDI AES Audio De-embedder with 4 balanced analog audio outputs
7720AD-B-A4-LTC	SD-SDI AES Audio De-embedder with 2 balanced AES outputs, 4 analog audio outputs and VITC to LTC Translator
7720AD4	SD-SDI AES Audio De-embedder with 4 unbalanced AES outputs (2 audio groups)
7720AD4-B	SD-SDI AES Audio De-embedder with 4 balanced AES outputs (2 audio groups)

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 7800FR, 7801FR, 7700FR-C or 350FR Multiframes
+1RU	1RU rear plate for use with 7701FR Multiframe
+SA	Standalone Enclosure Rear Plate

Enclosures
350FR	Portable Multiframe which holds 7 modules
7700FR-C	3RU Multiframe which holds 15 modules
7800FR	3RU Multiframe which holds 15 modules
7701FR	1RU Multiframe which holds 3 modules
S7701FR	7700 Series Standalone Enclosure

Tools

Audio & Data