ADLINK USB-2405 Dynamic Signal Acquisition Module Deployment Guide

7.2 Self calibration process

Preheat the module for at least 15 minutes to ensure stable temperature;

Run the calibration tool provided by ADLINK or call the API (without the need for any external signals);

Software automatically measures internal reference, calculates offset and gain errors, and updates TrimDAC values;

The new constant can be saved to the EEPROM user area for retention after power failure.

Self calibration can compensate for errors caused by environmental temperature changes and time drift. It is recommended to perform it once a year or after significant environmental changes. If you need to restore the factory values, you can copy the factory zone constants to the user zone through software.

Software Support and Development Tools

UD-DASK: a low-level driver library that supports languages such as C/C++, VB, C #, etc., providing a complete API for configuring sampling, triggering, GPIO, and data reading.

DAQPilot: A task oriented SDK that supports advanced environments such as LabVIEW and MATLAB, simplifying programming.

U-Test: A free practical tool that enables data acquisition, waveform display, FFT analysis, and digital I/O control without programming. It is suitable for quickly verifying system connections and signal quality.

Common troubleshooting and solutions

Fault 1: LED does not light up or remains red after inserting USB

Check if the USB cable is intact and replace the cable for testing;

Try different USB ports (prioritize USB 2.0 port on the motherboard rear);

If using a USB hub, ensure that its power supply capacity is ≥ 500mA;

Check if 'unknown device' appears in the device manager, and if so, manually install the driver.

Fault 2: U-Test or user program cannot find module

Confirm that the driver version is correct (UD-DASK ≥ 1.2.2.0627);

Check if the Device ID on the back of the module conflicts with other modules (if there is only one, keep it at 0);

Re plug and unplug the USB, observe the LED changes, and restart the software.

Fault 3: There is a large amount of bias or noise in the collected data

Check the input coupling method: If measuring low-frequency signals but mistakenly setting them as AC coupling, it will cause low-frequency attenuation;

Confirm if IEPE is enabled correctly: IEPE should not be turned on for ordinary voltage sources, otherwise the excitation current will cause a voltage drop across the internal resistance of the source, resulting in offset;

Perform self calibration and update gain/offset constants;

Check if the signal source is grounded together with the tested equipment to avoid ground loops (differential mode can be used).

Fault 4: Trigger unresponsive or incomplete data collection

Verify whether the amplitude of the trigger source signal is within the valid range (the simulated trigger threshold needs to be within ± 10V);

The digital trigger signal level should be compatible with 3.3V/5V TTL and have a pulse width of ≥ 20ns;

In pre trigger mode, ensure that the data buffer is filled with enough samples (≥ number of pre trigger points) after starting the collection, otherwise the trigger will be ignored;

Check if the number of triggers is set correctly and if the buffer is sufficient to accommodate all trigger data.

Fault 5: Phase deviation during multi module synchronization

Confirm that all modules use the same external sampling clock (input through GPIO) and the clock source is low jitter;

Activate all modules simultaneously using the same trigger signal (digital or analog);

Please note that the firmware versions of different modules are consistent, and it is recommended to update to the latest version.

Maintenance and usage suggestions

The working temperature of the module is 0-55 ℃, avoiding direct sunlight and strong convection;

BNC connectors should be regularly inspected to ensure that the contacts are not oxidized;

When not in use for a long time, please disconnect the USB cable and store it in a dry environment;

If it is necessary to replace the battery (onboard RTC battery), the same model must be used and environmentally friendly disposal must be followed.

Technical Support Information

If you are unable to resolve the issue on your own, please contact ADLINK technical support（ service@adlinktech.com ）Provide:

Module model (USB-2405) and serial number;

Operating system version (32/64 bit);

Driver and U-Test versions;

Fault reproduction steps and phenomenon description (including LED status);

Whether to test on multiple PCs.