Evertz Microsystems Quad Analog Audio to Dual AES Converter
(with 3 RU Rear Plate)
Product Highlights:
- Auto detect composite video or DARS on the reference input
- 24-bit, high-quality analog to digital audio conversion
- Support for 4 channels of analog audio (2 AES/EBU)
- Local card edge display and control of input gain
- 0dBFS programmable from 8dBu to 27dBu
- Automatic DC removal
**SPECIAL ORDER.
NO RETURNS**
Evertz Microsystems Quad Analog Audio to Dual AES Converter
The 7720ADC-A4 is a high-quality, 24-bit, analog to digital audio converter which provides digital conversion of 4 balanced analog audio channels and provides 2 unbalanced (or balanced from the 7720ADC-A4-B) AES/EBU channels out.
The sampling clock may free run at 48KHz or may be locked to either a DARS (Digital Audio Reference Signal) reference or composite video reference. Level control is provided via a card edge toggle switch. The input gain level can be read out from a card edge display for convenience. The full scale digital signal can be calibrated to accommodate peak levels ranging from 8dBu to 27dBu with 0.5dB resolution.
The audio ADC features a card edge VU meter for quick confidence monitoring. Four separate level indicators are provided via bargraphs for quick validation of audio program material.
| Analog Audio Input |
|---|
| Type |
Balanced analog audio |
| Number of Inputs |
4 |
| Connector |
Removable terminal strip |
| Impedance |
10kΩ minimum (differential) |
| Sampling Rate |
48KHz (freerun or locked to the reference) |
| Signal Level |
0dB FS =>8dBu to 27dBu (programmable via 0dB/+6dB jumper and card edge fine gain with -10dB to +10dB range) |
| Frequency Response |
< ±0.1dB, 20Hz to 20kHz |
| SNR |
100dB with input at -1dB FS |
| THD+N |
< 0.001% (> 100dB) @ 20Hz to 20kHz, -1dB FS |
| Crosstalk |
< -100dB at 20Hz-20kHz |
| Interchannel Phase Error |
< 1°, 20Hz to 20kHz |
| Reference Video Input |
|---|
| Standard |
NTSC (SMPTE ST 170), PAL (ITU624-4), DARS |
| Number of Inputs |
1 |
| Connector |
BNC per IEC 61169-8 Annex A |
| Signal Level |
Video
Max: 2V p-p video (composite only)
Min: Sync level 150m (composite only)
DARS: SMPTE ST 276, 1V p-p |
| Frequency Lock Range |
±100ppm from nominal |
| Impedance |
High Impedance |
| Return Loss |
> 25dB to 10MHz (with external 75Ω termination) |
| AES Audio Output |
|---|
| Standard |
SMPTE ST 276 single ended AES |
| Number of Outputs |
2 |
| Connector |
BNC per IEC 61169-8 Annex A |
| Sampling Rate |
48KHz |
| Impedance |
75Ω unbalanced |
| Resolution |
24 bits |
| Input/Output Delay |
0.87ms |
| Electrical |
|---|
| Voltage |
+12V DC |
| Power |
10 Watts (nominal) |
| EMI/RFI |
Complies with FCC Part 15 Class A, EU EMC Directive |
| Physical |
|---|
| Number of Slots |
1 |
