ADLINK Technology USB-1210 User manual

ADLINK Technical Document
Abstract
How to Use Pulse Measurement
OS
Windows
Keyword
GPTC
Related Products
USB-1210, USB-1901, USB-1902, USB-1903
Date
2021-12-28
No.
●Issue Details:
This document outlines how to use pulse width measurement, one of the several GPTC functions
available to users.
●More information:
Single period measurement calculates the period of the signal from GPTC_GATE in terms of
GPTC_CLK signal. The counter calculates the number of active edges on GPTC_CLK between two
active edges of GPTC_GATE.
Single pulse width measurement calculates the pulse width of the signal from GPTC_GATE in terms
of GPTC_CLK. The counter calculates the number of active edges on GPTC_CLK.

●Solution:
Step 1: Identify pins
Refer to the user manual and check the pin definitions to find the GPTC_CLK and GPTC_GATE pin
numbers. For the USB-1210, the GPTC_CLK is pin 19 and the GPTC_GATE is pin 17.
For the USB-1900 series, the GPTC_CLK is pin 31, the GPTC_GATE is pin 33.
*For other DAQ pin definitions, please consult the user manual.

Step 2: Connect pins
Connect the source signal for measurement to GPTC_GATE (pin 17).
Step 3: Install U-Test
Download and install the U-Test utility from the ADLINK website.

Step 4: Launch sample program
1. Launch U-test
2. Click Digital Input/Output in the left pane
3. Select the GPTC tab in the right pane
4. Under ModeOperation, select Single Period Measure or Single Pulse-Width

Step 5: Set gate and clock
Set GPTC_GATE to External and GPTC_CLK to Internal.
Step 6: Run
Press the run button (highlighted below) and the DAQ card will start to measure the period. The
source signal is 100Hz, the period is 1/100 = 0.01