ADLINK PXIe-9834 High Speed Digitizer Configuration Guide

ADLINK PXIe-9834 high-speed digitizer: detailed explanation of architecture, triggering, and multi module synchronization technology

In cutting-edge testing fields such as high-energy physics experiments, radar signal capture, fiber optic sensing, and partial discharge monitoring, strict requirements have been put forward for the sampling rate, bandwidth, dynamic range, and multi-channel synchronization of data acquisition systems. ADLINK PXIe-9834 is a 4-channel 16 bit 80 MS/s PXI Express high-speed digitizer that provides a complete solution for high-speed transient signal capture with up to 40 MHz analog bandwidth, flexible input impedance (50 Ω/1M Ω software optional), multi range (± 0.5V to ± 10V), and 1 GB onboard memory. This article is aimed at test system architects and hardware engineers, detailing the engineering deployment and optimization strategies of the module from dimensions such as module installation, front-end configuration (impedance/coupling/range), trigger source and trigger mode (including pre trigger, medium trigger, and re trigger), multi module synchronization (based on PXI backplane trigger bus and star trigger), external clock and reference clock, DMA data stream, and automatic calibration, to help build a high-frequency high-precision acquisition system.

Product positioning and core specifications

PXIe-9834 is a 3U single slot PXI Express digitizer designed specifically for transient signal measurements that require high sampling rates and wide bandwidth. Its core features include:

Sampling rate and resolution: up to 80 MS/s synchronous sampling per channel, 16 bit successive approximation ADC, no inter channel phase delay.

Analog input: 4-channel single ended SMA interface, input impedance 50 Ω or 1M Ω software switchable, coupling mode DC or AC (software select).

Range: ± 0.5V, ± 1V, ± 5V, ± 10V (± 10V is only available in 1M Ω impedance mode).

Bandwidth and filtering: -3 dB bandwidth, typical 40 MHz, built-in 10 MHz/20 MHz digital filter (software optional).

Onboard memory: 1 GB (based on DDR3), supports long-term continuous acquisition, even when running at the highest sampling rate.

Bus interface: PCI Express Gen1 x4, supports Scatter Gather DMA, with a theoretical continuous transfer rate of approximately 640 MB/s (four channels 80 MS/s x 2 bytes=640 MB/s).

Trigger: software trigger, external digital trigger (SMA, TTL), analog trigger (any AI channel) PXI Trigger Bus[0..7]、PXI STAR、PXIe_DSTARB。

Trigger modes: post trigger, delayed trigger, pre trigger, medium trigger, and re trigger (can be triggered repeatedly in post trigger/delayed trigger modes).

Clock: Internal 80 MHz oscillator (accuracy ± 25 ppm), external sampling clock (10~80 MHz, via CLK IN), external reference clock (10 MHz, via CLK IN or PXI backplane 10 MHz).

Calibration: Fully automatic calibration, built-in reference source (1.8V/0.9V/0.45V), temperature coefficient of 5 ppm/° C, recommended preheating time of 15 minutes.

Typical applications include radar/LiDAR signal acquisition, partial discharge monitoring, non-destructive testing (NDT), fiber optic sensing demodulation, high-energy physics experiments, etc.

Hardware installation and environment preparation

2.1 Anti static and tool requirements

PXIe-9834 belongs to electrostatic sensitive equipment, and before installation, it is necessary to prepare:

Grounding anti-static pad and anti-static wristband.

Cross/Phillips screwdriver (preferably with magnetic head).

Ensure that the workbench is flat and well lit.

2.2 Chassis installation steps

Turn off the power of the PXIe chassis and unplug the power cord (hot plugging is strictly prohibited).

Push the module smoothly along the chassis rail until the backplane connector creates resistance.

Lift up the ejector handle to fully position the module and hear a "click" locking sound.

Secure the panel screws to ensure mechanical stability.

Connect all SMA cables (analog input, CLK IN, TRG IN) before powering on.

Packing list: Only module body and quick start guide. SMA cables need to be purchased separately, and it is recommended to use high-quality 50 Ω coaxial cables to maintain signal integrity.

2.3 Environmental conditions

Working temperature: 0 ° C to 50 ° C; Storage temperature: -20 ° C to 80 ° C.

Relative humidity: 5%~95% (no condensation).

Power consumption: standby about 5.46 W (+3.3V @ 18mA++12V @ 450mA), full load about 9.28 W (+3.3V @ 70mA++12V @ 753mA).

In depth analysis of analog front-end

3.1 Input Impedance and Coupling Selection

50 Ω mode: suitable for high-frequency signals (such as RF/microwave), matching the characteristic impedance of the transmission line to reduce reflection. Supports ranges of ± 0.5V, ± 1V, ± 5V (± 10V not available).

1M Ω mode: suitable for high impedance signal sources (such as oscilloscope probes, passive sensors), supporting all ranges (including ± 10V).

Coupling method:

DC coupling: complete transmission of DC components, suitable for measuring pulse baselines and slowly varying signals.

AC coupling: Blocking DC through high pass filtering to avoid high DC bias compression of dynamic range, suitable for measuring AC superimposed signals (note low-frequency cutoff characteristics).