Network Analyzer - Test Suite

Note

User guide: Network Analyzer user guide

Note

Tester

Test Date

Scopy version

Plugin version (N/A if not applicable)

Comments

Setup environment:

Adalm2000.Device:

  • Open Scopy.

  • Connect the ADALM2000 device to the system.

  • Connect the ADALM2000 device in Scopy using the USB/network backend.

Depends on:

  • Test TST.PREFS.RESET

Prerequisites:

  • Scopy v2.0.0 or later with ADALM2000 plugin installed on the system.

  • Tests listed as dependencies are successfully completed.

  • Reset .ini files to default using the Preferences “Reset” button.

Test 1 - Low Pass Filter CH1 340Hz

UID: TST.NA.LOWPASS_CH1_340HZ

Description: This test verifies the functionality of the Network Analyzer using a Low Pass Filter.

Preconditions:

  • Adalm2000.Device

  • Using a breadboard, create the following connections:

    • Connect the resistor and capacitor in series (resistor on the left side, capacitor on the right side).

    • Connect the right capacitor terminal to 2-, 1- and GND.

    • Connect the left resistor terminal to 1+ and W1.

    • Probe the intersection node between the resistor and capacitor with 2+.

  • OS: ANY

Resources:

  • Resistor: R = 470 Ohms

  • Capacitor: C = 1uF

Steps:
  1. In the Network Analyzer settings menu set the following:

    • Reference: Channel 1, 1V Amplitude, 0V Offset

    • Sweep: Logarithmic, Start: 10Hz, Stop: 500kHz, Sample Count: 100

    • Display: Min. Magnitude: -90dB, Max. Magnitude: 10dB, Min. Phase: -150°, Max. Phase: 60°

  2. Run the Network Analyzer. Check the frequency response in the Bode plot.

    • Expected result: On the Magnitude Plot, after a flat section (passband), response, the trace drops at around 340Hz (cutoff frequency).

    • Actual result:

  1. Enable the “Cursor” and move it to find the -3dB point on the trace.

    • Expected result: The magnitude indicates -3dB at approximately 340 Hz. The phase corresponding to the same frequency is also displayed.

    • Actual result:

  1. Disable the cursor by clicking the box again.

    • Expected result: The cursor controls disappear from the interface.

    • Actual result:

  1. Open the General Settings and change the plot type to Nyquist:

    • Expected result: The Magnitude and Phase plot are replaced by a Polar plot.

    • Actual result:

  1. Change the plot type to Nichols.

    • Expected result: The polar plot is replaced by a single plot with the magnitude on the Y Axis and phase on the X Axis.

    • Actual result:

  1. Change the plot type to Bode and switch to Linear sweep type.

    • Expected result: The plot frequency scale changes to a linear one. The signal drops abruptly until it reaches -3dB at around 340Hz, then the trace flattens.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL

Test 2 - Low Pass Filter CH2 340Hz

UID: TST.NA.LOWPASS_CH2_340HZ

Description: This test verifies the functionality of the Network Analyzer using a Low Pass Filter.

Preconditions:

  • Adalm2000.Device

  • Using a breadboard, create the following connections:

    • Connect the resistor and capacitor in series (resistor on the left side, capacitor on the right side).

    • Connect the right capacitor terminal to 2-, 1- and GND.

    • Connect the left resistor terminal to 2+ and W1.

    • Probe the intersection node between the resistor and capacitor with 1+.

  • OS: ANY

Resources:

  • Resistor: R = 470 Ohms

  • Capacitor: C = 1uF

Steps:
  1. In the Network Analyzer settings menu set the following:

    • Reference: Channel 2, 1V Amplitude, 0V Offset

    • Sweep: Logarithmic, Start: 10Hz, Stop: 500kHz, Sample Count: 100

    • Display: Min. Magnitude: -90dB, Max. Magnitude: 10dB, Min. Phase: -150°, Max. Phase: 60°

  2. Run the Network Analyzer. Check the frequency response in the Bode plot.

    • Expected result: On the Magnitude Plot, after a flat section (passband), response, the trace drops at around 340Hz (cutoff frequency).

    • Actual result:

  1. Enable the “Cursor” and move it to find the -3dB point on the trace.

    • Expected result: The magnitude indicates -3dB at approximately 340 Hz. The phase corresponding to the same frequency is also displayed.

    • Actual result:

  1. Disable the cursor by clicking the box again.

    • Expected result: The cursor controls disappear from the interface.

    • Actual result:

  1. Open the General Settings and change the plot type to Nyquist:

    • Expected result: The Magnitude and Phase plot are replaced by a Polar plot.

    • Actual result:

  1. Change the plot type to Nichols.

    • Expected result: The polar plot is replaced by a single plot with the magnitude on the Y Axis and phase on the X Axis.

    • Actual result:

  1. Change the plot type to Bode and switch to Linear sweep type.

    • Expected result: The plot frequency scale changes to a linear one. The signal drops abruptly until it reaches -3dB at around 340Hz, then the trace flattens.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL

Test 3 - Low Pass Filter CH1 1.59MHz

UID: TST.NA.LOWPASS_CH1_1_59MHZ

Description: This test verifies the functionality of the Network Analyzer using a Low Pass Filter.

Preconditions:

  • Adalm2000.Device

  • Using a breadboard, create the following connections:

    • Connect the resistor and capacitor in series (resistor on the left side, capacitor on the right side).

    • Connect the right capacitor terminal to 2-, 1- and GND.

    • Connect the left resistor terminal to 1+ and W1.

    • Probe the intersection node between the resistor and capacitor with 2+.

  • OS: ANY

Resources:

  • Resistor: R = 1 kOhms

  • Capacitor: C = 100 pF

Steps:
  1. In the Network Analyzer settings menu set the following:

    • Reference: Channel 1, 1V Amplitude, 0V Offset

    • Sweep: Logarithmic, Start: 50Hz, Stop: 30MHz, Sample Count: 100

    • Display: Min. Magnitude: -45dB, Max. Magnitude: 10dB, Min. Phase: -100°, Max. Phase: 20°

  2. Run the Network Analyzer. Check the frequency response in the Bode plot.

    • Expected result: On the Magnitude Plot, after a flat section (passband), response, the trace drops at around 1.5 MHz (cutoff frequency).

    • Actual result:

  1. Enable the “Cursor” and move it to find the -3dB point on the trace.

    • Expected result: The magnitude indicates -3dB at approximately 1.5MHz. The phase corresponding to the same frequency is also displayed.

    • Actual result:

  1. Disable the cursor by clicking the box again.

    • Expected result: The cursor controls disappear from the interface.

    • Actual result:

  1. Switch to Linear sweep type.

    • Expected result: The plot frequency scale changes to a linear one. The signal gradually drops and reaches -3dB at around 1.59MHz.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL

Test 4 - High Pass Filter CH1 340Hz

UID: TST.NA.HIGHPASS_CH1_340HZ

Description: This test verifies the functionality of the Network Analyzer using a High Pass Filter.

Preconditions:

  • Adalm2000.Device

  • Using a breadboard, create the following connections:

    • Connect the capacitor and resistor in series (capacitor on the left side, resistor on the right side).

    • Connect the right resistor terminal to 2-, 1- and GND.

    • Connect the left capacitor terminal to 1+ and W1.

    • Probe the intersection node between the resistor and capacitor with 2+.

  • OS: ANY

Resources:

  • Resistor: R = 470 Ohms

  • Capacitor: C = 1uF

Steps:
  1. In the Network Analyzer settings menu set the following:

    • Reference: Channel 1, 1V Amplitude, 0V Offset

    • Sweep: Logarithmic, Start: 1Hz, Stop: 1MHz, Sample Count: 100

    • Display: Min. Magnitude: -90dB, Max. Magnitude: 10dB, Min. Phase: -180°, Max. Phase: 180°

  2. Run the Network Analyzer. Check the frequency response in the Bode plot.

    • Expected result: On the Magnitude Plot, the first section is an increasing ramp until the magnitude reaches -3dB at around 340Hz which is the cutoff frequency. After the cutoff frequency, the magnitude plot flattens, indicating the high pass allows the frequencies to pass without attenuation.

    • Actual result:

  1. Enable the “Cursor” and move it to find the -3dB point on the trace.

    • Expected result: The magnitude indicates -3dB at approximately 340 Hz. The phase corresponding to the same frequency is also displayed.

    • Actual result:

  1. Disable the cursor by clicking the box again.

    • Expected result: The cursor controls disappear from the interface.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL

Test 5 - Band Pass Filter CH1

UID: TST.NA.BANDPASS_CH1

Description: This test verifies the functionality of the Network Analyzer using a Band Pass Filter with a low cutoff frequency of 1.59kHz and a high cutoff frequency of 15.9kHz.

Preconditions:

  • Adalm2000.Device

  • Using a breadboard, create the following connections:

    • Connect C1 and R1 in series (capacitor on the left side, resistor on the right side).

    • Connect the right R1 terminal to 2+ and the left terminal of C2.

    • Connect the left C1 terminal to 1+ and W1.

    • Connect the intersection node between R1 and C1 to the left terminal of R2.

    • Connect the right terminal of R2, 2-, 1- and the right terminal of C2 to GND.

  • OS: ANY

Resources:

  • Resistor: R1 = 100 Ohms

  • Resistor: R2 = 100 Ohms

  • Capacitor: C1 = 1uF

  • Capacitor: C2 = 0.1uF (Analog Devices part code 104)

Steps:
  1. In the Network Analyzer settings menu set the following:

    • Reference: Channel 1, 1V Amplitude, 0V Offset

    • Sweep: Logarithmic, Start: 50Hz, Stop: 5MHz, Sample Count: 100

    • Display: Min. Magnitude: -90dB, Max. Magnitude: 10dB, Min. Phase: -180°, Max. Phase: 180°

  2. Run the Network Analyzer. Check the frequency response in the Bode plot.

    • Expected result: On the Magnitude Plot, the first section is an increasing ramp until the magnitude reaches -3dB at around 1.59kHz which is the lower cutoff frequency. The trace section after the lower cutoff frequency is a the passband. The trace drops from -3dB at around 15.9kHz which is the higher cutoff frequency.

    • Actual result:

  1. Enable the “Cursor” and move it to find the -3dB points on the trace.

    • Expected result: The magnitude indicates -3dB at approximately 1.59 kHz and 15.9 kHz.

    • Actual result:

  1. Disable the cursor by clicking the box again.

    • Expected result: The cursor controls disappear from the interface.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL

Test 6 - Band Stop Filter CH1

UID: TST.NA.BANDSTOP_CH1

Description: This test verifies the functionality of the Network Analyzer using a Band Stop notch Filter with a notch frequency of 795Hz.

Preconditions:

  • Adalm2000.Device

  • Using a breadboard, create the following connections:

    • Connect C1 and C2 in series.

    • Connect C1 and R1 in series (capacitor on the left side, resistor on the right side).

    • Connect R2 and R3 in series.

    • Connect C3 in series with R1 on the left and the intersection between R2 and R3 on the right.

    • Connect the right terminal of R3 to the right terminal of C2 and to 2+.

    • At the intersection between R1 and C3, connect 1-, 2- and GND.

    • Connect the left terminal of C1 to the left terminal of R2 and to 1+ and W1.

  • OS: ANY

Resources:

  • Resistor: R1 = 100 Ohms

  • Resistor: R2 = 200 Ohms

  • Resistor: R3 = 200 Ohms

  • Capacitor: C1 = 1uF

  • Capacitor: C2 = 1uF

  • Capacitor: C3 = 2uF

Steps:
  1. In the Network Analyzer settings menu set the following:

    • Reference: Channel 1, 1V Amplitude, 0V Offset

    • Sweep: Logarithmic, Start: 20Hz, Stop: 10MHz, Sample Count: 100

    • Display: Min. Magnitude: -50dB, Max. Magnitude: 5dB, Min. Phase: -180°, Max. Phase: 180°

  2. Run the Network Analyzer. Check the frequency response in the Bode plot.

    • Expected result: On the Magnitude Plot, the trace is around -3dB on the entire spectrum, except at around 795Hz where the trace drops and then rises again to -3dB.

    • Actual result:

  1. Enable the “Cursor” and move it to find the low point on the trace.

    • Expected result: The magnitude drops at around 795Hz.

    • Actual result:

  1. Disable the cursor by clicking the box again.

    • Expected result: The cursor controls disappear from the interface.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL

Test 7 - Print Plot

UID: TST.NA.PRINT_PLOT

Description: Check the print plot feature of the Network Analyzer by exporting the low pass filter plot screenshot to a PDF file.

Preconditions:
Steps:

  1. Setup the Network Analyzer as stated in the low pass filter test linked above.

  2. Click the Print plot button and choose a name and location for the file.

    • Expected result: The file is saved as a BMP in the selected location.

    • Actual result:

  1. Open the exported file and verify it:

    • Expected result: The plot is correctly saved in the BMP file.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL

Test 8 - Buffer Previewer

UID: TST.NA.BUFFER_PREVIEWER

Description: Check the buffer previewer feature of the Network Analyzer by viewing the acquired data in the Oscilloscope and analyzing measurements.

Preconditions:
Steps:
  1. In the Network Analyzer set the following configuration:

    • Reference: Channel 1, 1V Amplitude, 0V Offset

    • Sweep: Linear, Start: 20Hz, Stop: 1MHz, Sample Count: 10

    • Display: Min. Magnitude: -50dB, Max. Magnitude: 5dB, Min. Phase: -180°, Max. Phase: 180°

  2. Run a Single capture in the Network Analyzer.

  3. In the Sweep settings menu, enable the Buffer Previewer.

    • Expected result: A time domain plot appears above the Bode plot.

    • Actual result:

  1. Slide the blue handle at the leftmost end of the plot.
    • Expected result:

      • A sinewave is displayed on the time plot.

      • Below the time plot the Sample Count is 1/10, Current Frequency is 20Hz.

    • Actual result:

  1. In the Sweep settings menu click the ViewInOsc button.
    • Expected result:

      • The Oscilloscope instrument is opened.

      • The data is displayed as reference waveform in the Oscilloscope.

      • The measurements show a frequency of 20Hz.

    • Actual result:

  1. Slide the blue handle at the rightmost end of the plot.
    • Expected result:

      • A sinewave is displayed on the time plot.

      • Below the time plot the Sample Count is 10/10, Current Frequency is 1MHz.

    • Actual result:

  1. In the Sweep settings menu click the ViewInOsc button.
    • Expected result:

      • The Oscilloscope instrument is opened.

      • The data is displayed as reference waveform in the Oscilloscope.

      • The measurements show a frequency of 1MHz.

    • Actual result:

Tested OS:

Comments:

Result: PASS/FAIL