7720ADC-A4
Evertz
7720ADC-A4
Evertz 7720ADC-A4 Quad Analog Audio-to-Dual-AES Converter
This 24-bit, analog-to-digital audio converter provides digital conversion of four balanced analog audio channels and provides two 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.
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.
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Manufacturer Specs
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 170M), 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 276M, 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 276M 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
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 170M), 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 276M, 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 276M 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