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7720DAC-A4 & 7720DAC-A4-B

Dual AES to Quad Analog Audio Converter with 非平衡/平衡 AES Inputs

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The 7720DAC-A4 is a high-quality, 24-bit, digital to analog audio converter which converts 2 AES/EBU digital signals to 4 balanced analog audio signals. The 7720DAC-A4 has two independent AES/EBU converters. The inputs sample rate supported are 44.1 KHz and 48KHz. All analog audio outputs levels may be set individually from the front panel.

Level control is provided via a card edge toggle and the set 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 of 12dBu to 25dBu with 0.1dB resolution.

The audio DAC 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.

特点

  • AES3/IEC-958 or AES-3id/SMPTE276/S/PDIF
  • 24-bit, high-quality conversion
  • 44.1 and 48KHz sampling rate
  • 0dBFS programmable from 12dBu to 25dBu
  • Support for 4 channels of balanced analog audio (2 AES/EBU)
  • Clock recovery via VCXO for extra stable sample clock generation
  • A card edge display provides a 4 channel bar graph type level indicator display for confidence monitoring
  • Local card edge display for level setup
  • Drives directly 600Ω loads
  • 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

指标|

非平衡 AES Audio Inputs

7720DAC-A4
输入数量 2
标准 SMPTE ST 276M, unbalanced AES
Connectors BNC per IEC 169-8
信号电平 0.1 to 2.5V p-p
均衡 > 1000m @ 48kHz with 1V p-p drive and Belden 8281 or equivalent coax cable
Resolution 24-bit
Sample Rate 44.1, 48kHz, ±100ppm (all other rates between 42 – 50kHz will remain audible but somewhat distorted)
Input Impedance 75Ω, AC-coupled
反射损失 < 25dB, 0.1 – 6.0MHz
BNC Grounding AC-coupled (for 60Hz ground loop current protection)

平衡 AES Audio Inputs

7720DAC-A4-B
输入数量 2
标准 AES3-1992, balanced AES
Connectors 3-pin removable terminal strip
信号电平 0.2 to 10V p-p
均衡 > 400m @ 48kHz with 2 – 10V p-p drive and Belden 1800B or equiv. shielded twisted pair cable
Resolution 24-bit
Sample Rate 44.1, 48kHz, ±100ppm (all other rates between 42 – 50kHz will remain audible but somewhat distorted)
Input Impedance 110Ω ±10%, transformer coupled
Shield Grounding AC-coupled (for 60Hz ground loop current protection)

Analog Audio Output
输出数量 4
Type 平衡 analog audio
Connectors 2x 6-pin removable terminal strip
Output Impedance 66Ω
信号电平 0dB FS ⇒ 12-25dBu into 10kΩ load (user configurable)
0dB FS ⇒ 12-24dBu into 600Ω load
频率响应 < ±0.05dB (20Hz to 20kHz)
Dynamic Range 24-bit
THD+N < -100dB RMS @ 20Hz to 20kHz, with 24dBu output, unweighted
信噪比 > 110dB RMS (20Hz to 20kHz), unweighted
Crosstalk Isolation > 110dB RMS (20Hz to 20kHz), unweighted
Inter-Channel Phase Error < ±1°(20Hz to 20kHz)
Digital to Analog Delay 0.95m sec

电气
电压 +12V DC
功率 12 watts
EMI/RFI Complies with FCC Part 15, Class A, EU EMC directive

物理参数
插槽数 2

订购信息|

7720DAC-A4 Dual AES to Quad Analog Audio Converter with unbalanced AES inputs
7720DAC-A4-B Dual AES to Quad Analog Audio Converter with balanced AES inputs

订购可选项
注意 • 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, 7800FR or 7801FR 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
7801FR 1RU Multiframe which holds up to 4 single slot or 2 dual slot modules
S7701FR 7700 Series Standalone Enclosure

附件
7800FC VistaLINK® Frame Controller
CP-2116E-H Remote Control Panel
CP-2232E Remote Control Panel