Evertz 7720ADC-A4 Quad Analog Audio to Dual AES Converter and Balanced AES Converter
In stock
Features
- 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
- A card edge display provides a 4 channel bargraph type level indicator display for confidence monitoring
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
CMRR
- 100dB at 1kHz
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
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