GY-DAQ-2510DA Dual-Channel High-Speed DAS Demodulation Card

Overview

The GY-DAQ-2510DA is a clock-synchronized high-speed data acquisition card dedicated to Distributed Acoustic Sensing (DAS). It delivers a 1GSps sampling rate while outputting analog signals with up to 500MHz bandwidth, capable of directly driving Acousto-Optic Modulators (AOM) under full clock synchronization. This design generates demodulated signals with lower harmonic distortion and eliminates abnormal interference frequencies.

Equipped with a high-performance on-board FPGA chip integrated with abundant digital processing units, the card communicates with host PCs via a PCIe 3.0 x8 interface, supporting real-time upload of demodulated data at a maximum throughput of 4GB/s. It features dual-channel 14-bit high-speed ADCs for synchronous triggered sampling at 1GSps across both channels, supporting DAS data acquisition over fiber lengths exceeding 100km.

Built-in phase demodulation algorithms output amplitude and phase demodulation data directly. The phase data can be used as vibration signals without secondary post-demodulation, enabling full optical cable demodulation out of the box. The driver software offers cross-platform compatibility with multiple Windows and Linux OS versions, facilitating seamless system integration for developers.

Compared with traditional IQ demodulation DAQ cards, this model integrates dedicated phase demodulation logic to suppress coherent fading and achieve full-domain demodulation, drastically improving the accuracy and stability of demodulated signals for subsequent signal processing and identification workflows. It eliminates post-processing steps such as phase unwrapping, reduces CPU computing load, lowers development barriers, and delivers ready-to-use data where phase readings directly correspond to vibration measurements.

System Block Diagram

Core Specifications

• Dual-channel 14-bit ADC synchronous real-time sampling at 1GSps
• 16-bit DAC with 6GSps sampling rate
• AC-coupled ADC inputs with 50Ω input impedance
• DC-coupled DAC outputs with 50Ω output impedance
• 2.72Vpp ADC input range, 5MHz–250MHz analog input bandwidth
• 1Vpp DAC output range, 0–500MHz analog output bandwidth
• Up to 66dBc SFDR (ADC) / 86dBc SFDR (DAC)
• Configurable trigger output pulse & external trigger input support
• PCIe 3.0 x8 high-speed data transmission interface
• Embedded dedicated fiber optic sensing demodulation algorithms

Detailed Parameter Table

Mechanical Dimensions

• Board Size: 193.9mm (L) × 126mm (W) × 26.9mm (D)

Environmental Specifications

• Operating Temperature: -20°C ~ 60°C
• Storage Temperature: -40°C ~ 85°C

Supported Software & Development Environments

• Operating Systems: Windows, Linux
• Programming Languages & Tools: C, C++, Python, LabVIEW

Mechanical Outline Drawing

Application Fields

This DAQ card is widely compatible with coherent demodulation solutions for Distributed Acoustic Sensing (DAS) fiber optic sensors. It supports both 80MHz AOM and 200MHz AOM modulation, and works with most mainstream commercial DAS modules adopting identical modulation architectures.

Port Definition

1. PCIe Interface: High-speed bidirectional data transmission and board parameter configuration
2. CH1: Analog Acquisition Channel 1
3. CH2: Analog Acquisition Channel 2
4. AWG1: Analog Output Channel 1 (Functional)
5. AWG2: Analog Output Channel 2 (Hardware Reserved, Non-Operational)
6. Trig-In: External Trigger Input, 3.3V TTL Level
7. Trig-Out: Internal Acquisition Trigger Output, Selectable 3.3V / 5V TTL Level

Ordering Information