PCBA Functional Test Demo Test Sequence

The PCBA FT Demo test sequence demonstrates testing PCBA DUTs in TestStand using the PCB Assembly Test Toolkit measurement libraries built in LabVIEW. Refer to the individual library documentation for more information about how to use each library in your own application.

Highlighted Features

The PCBA FT Demo sequence demonstrates the following features:
  • Power Diagnostics—Sources the supply voltage using a power module and measures the DC Regulators test points simultaneously with an analog input module. This function uses the following libraries:
    • DAQ_Power Supply Source and Measure
    • DAQ_DC-RMS Voltage Measurement
  • Battery or charger voltage and current sleep mode—Sources the USB supply voltage using a power module or external USB power supply and measures the PCBA charger voltages and current regulation using a multiplexer and DMM in a PXI scan configuration. This function uses the following library: DMM_Scan PXI Mux PXI Shunt 16V-15C
  • Reset and Self-Test—Uses a digital output module to source a static DC state and perform push reset button actions. Uses analog input modules to performs DC-RMS voltage measurements on power and status LED test points. This function uses the following libraries:
    • DAQ_Static Digital State Generation
    • DAQ_DC-RMS Voltage Measurement
  • Animation and Sound User Input Test—Uses an analog output module to source DC voltage and perform push button actions. Uses analog input modules to measure time domain measurements on specific test points. The configured hardware triggers reduce the delay between the button action and the measurement. This function uses the following libraries:
    • DAQ_DC Voltage Generation
    • DAQ_Time Domain Measurement
  • Audio Filter Test—Sends a multi-tone sine wave with an analog output module, captures it with an analog input module, and extracts the detected tones to verify the frequency and amplitude. The configured hardware triggers reduce the delay between signal generation and signal capture. This function uses the following libraries:
    • DAQ_Signal Voltage Generation
    • DAQ_Frequency Domain Measurement
  • Turn Off All AO Channels—Powers down all analog output channels by configuring the output voltage as 0 volts. This example uses the DAQ_DC Voltage Generation library.
  • Power Down Supply—Powers down all power supplies by disabling the output. This example uses the DAQ_DC Voltage Generation library.

    • Setup Diagram

    The following figures represent the simulated hardware setup used in this example sequence. Refer to individual device specifications for pinouts and relevant specifications.

    Figure 2. Power Diagnostics


    Figure 3. Battery or charger voltage and current sleep mode


    Figure 4. Reset and Self-Test


    Figure 5. Animation and Sound User Input Test


    Figure 6. Audio Filter Test


    The following table provides a detailed summary of the functional demo sequence test scenario.

    PCBA Functional Test Demo LSL USL Units Timing (s) Test Points V Mode Analysis Value Trigger Procedure/Condition Measurement Library
    Power Diagnostics
    To power up and measure start-up transition max pic current, idle power consumption, and DC regulators.
    Start-up transition max pic current 0 1 A 0.1 TP_POWER0 Ref Max Current Maintain existing value Set Power On Voltage to 5 V, 3 A, Maintain Existing Value, Measure TP_Max Current (Pic Transition) Power supply source and measure
    Idle power consumption 4.5 5.5 W 0.1 TP_POWER0 Ref Idle Watt Maintain existing value Measure idle watt, Power voltage already On Power supply source and measure
    DC Regulators 0.9 1.1 V 0.1 TP_REG0 Ref Average DC Voltage No Measure regulator voltage around 1 V DC-RMS voltage measurement
    - 3.1 3.4 V - TP_REG1 Ref Average DC Voltage No Measure regulator voltage around 3.3 V -
    - 4.8 5.2 V - TP_REG2 Ref Average DC Voltage No Measure regulator voltage around 5 V -
    Battery or charger voltage and current sleep mode
    USB Voltage 4.75 5.25 V DMM 5.5 Dig ch0 Diff DMM No Close all Current Shunts to Power the DUT, Scan ch0 DMM Scan PXI MUX SHUNT Topology
    Li-ion Battery Voltage 2.5 4.25 V DMM 5.5 Dig ch1 Diff DMM No Scan ch1, SOC dependent -
    USB Current 0 500 mA DMM 5.5 Dig ch16 Diff DMM No Scan ch16, SOC dependent -
    Li-ion Battery Current 0 500 mA DMM 5.5 Dig ch17 Diff DMM No Scan ch17, SOC dependent -
    Battery Voltage Sleep Mode 2.5 4.25 V DMM 5.5 Dig ch1 Diff DMM No Wait inactivity for 2 sec, Scan ch1 New Scan
    Battery Current Sleep Mode 5 15 µA DMM 6.5 Dig ch17 Diff DMM No Scan ch17 -
    Reset and self-test
    To simulate Push Reset Button On/Off condition for 0.1 sec followed by a 5 sec wait for reboot to check voltage values on power and status LEDs.
    Push button reset V Wait for 0.1 sec followed by a 5 sec wait for reboot TP_RESET0 Ref Switch ON 0.1 sec then switch OFF with digital output (DO Module switch), Wait Reboot for 5 sec Static digital state generation
    Power LED0 RED 1.8 2.2 V 0.1 TP_LED0 Diff Average DC Voltage No Measure value for state (LED Power) DC-RMS voltage measurement
    Status LED1 GREEN 2.6 3.2 V - TP_LED1 Diff Average DC Voltage No Measure value for state (LED Status) -
    Animation and sound user input test
    To simulate the push on a volume button to generate a sound and a light animation to the LED.
    Push action button 0.5 TS_Button0 Ref No Generate DC 3.3 V to simulate Button On DC voltage generation
    Animation action LED 25% 35% Duty cycle 0.5 TP_VOL_LED0 Ref TDM Voltage Duty Cycle Trigger on button Measure PWM square signal On Volume LED Time domain measurement
    Tone action sound check 990 1010 Hz 0.5 TP_TWEET0 Ref TDM Voltage Frequency - Measure 1 kHz frequency on Tweeter -
    Audio filter test
    To test if measured tones frequency are within ±10% of tolerance
    Send multi-tone audio 0.1 TP_LineIn Ref Send 4 tones: 10 Hz, 100 Hz, 1 kHz, 10 kHz, 1 V sine signal Signal voltage generation
    Measure tone -10% +10% Hz 0.1 TP_LineOut Ref Detected Tones Frequencies (0, 1, 2, 3) Trigger from signal generation Measure 4 tones: 10 Hz, 100 Hz, 1 kHz, 10 kHz Frequency domain measurement
    - -10% +10% V 0.1 - Ref Detected Tones Amplitudes (0, 1, 2, 3) - Measure 4 voltage amplitudes -