描述
GE VMIVME-3122是一款高性能16位模数转换器（ADC）板，专为VME总线系统设计，广泛应用于工业自动化、数据采集、实验室仪器等领域。以下是其核心功能与技术参数的综合解析：
一、核心性能参数
分辨率与通道配置
-16位数字化分辨率：提供高精度数据采集能力，支持±2.5 V、±5 V、±10 V及0-5 V/0-10 V输入范围。
-64通道模拟输入：支持差分或单端模式，兼容热电偶、热电阻、应变计等信号调理需求。
扫描速率与增益控制
-可选扫描速率：标准模式下381 Hz至50 kHz，高性能选件可达100 kHz。
-可编程增益：支持x1或x10增益配置，可通过软件独立设置每个通道或全局固定增益。
二、功能特性
触发与扫描模式
-三种触发模式：软件触发、外部触发（TTL兼容）、间隔定时器触发。
-三种扫描模式：自动扫描（默认）、单次扫描（触发后执行）、随机存取（按需选择通道）。
数据缓冲与中断机制
-双端口数据缓冲器：支持16至1,024字数据存储，可灵活调整缓冲区大小。
-总线中断器：支持扫描中期/末期中断请求，可自定义中断触发条件（如采样数量）。
同步与定时功能
-可编程间隔定时器：控制数据突发间隔（最长687秒），支持重复或单次脉冲串。
-多板同步：通过外部触发器同步最多16块电路板，实现高通道密度采集。
三、扩展与兼容性
VME总线接口
-支持A16/A24/A32地址空间配置，兼容不同系统架构。
-可选监管/用户权限访问控制。
信号调理与滤波
-低通滤波器：抑制高频噪声，提升信号质量。
-过压保护输入：防止外部信号损坏电路板。
GE VMIVME-3122 is a high-performance 16-bit analog-to-digital converter(ADC)board designed for VME bus systems and widely used in industrial automation,data acquisition,laboratory instruments and other fields.The following is a comprehensive analysis of its core functions and technical parameters:
I.Core performance parameters
Resolution and channel configuration
-16-bit digital resolution:Provides high-precision data acquisition capabilities,supports±2.5 V,±5 V,±10 V and 0-5 V/0-10 V input ranges.
-64-channel analog input:Supports differential or single-ended mode,compatible with signal conditioning requirements such as thermocouples,thermal resistors,strain gauges,etc.
Scan rate and gain control
-Optional scan rate:381 Hz to 50 kHz in standard mode,up to 100 kHz with high-performance options.
-Programmable gain:Supports x1 or x10 gain configuration,and each channel or global fixed gain can be set independently through software.
2.Features
Trigger and Scan Mode
-Three trigger modes:software trigger,external trigger(TTL compatible),interval timer trigger.
-Three scan modes:automatic scan(default),single scan(executed after trigger),random access(select channels on demand).
Data Buffer and Interrupt Mechanism
-Dual-port data buffer:supports 16 to 1,024 words of data storage,and can flexibly adjust the buffer size.
-Bus interrupter:supports mid-/end-of-scan interrupt requests,and can customize interrupt trigger conditions(such as number of samples).
Synchronization and Timing Function
-Programmable interval timer:controls data burst interval(up to 687 seconds),supports repeated or single pulse trains.
-Multi-board synchronization:synchronize up to 16 boards through external triggers to achieve high channel density acquisition.
3.Expansion and Compatibility
VME Bus Interface
-Supports A16/A24/A32 address space configuration,compatible with different system architectures.
-Optional supervision/user authority access control.
Signal conditioning and filtering
-Low-pass filter:suppresses high-frequency noise and improves signal quality.
-Overvoltage protection input:prevents external signals from damaging the circuit board.
