Card frequency test steps:
1. Connect the BNC port behind the card test probe to the BNC port on the spectrometer panel
2. Set the buttons as shown in the diagram, "SCANWIDTH" to 5 by pressing the case of the left and right arrows below
3. Adjust the "CENTER FREQ" knob to bring the highest point to the horizontal CENTER point of the display panel
4. Put the card into the test probe box
5. Adjust the "MARKER" knob to sweep the frequency point to the highest point on the right of the center line
6. At this point, the LED display value is the resonance frequency of the card
Performance of spectrum analyzer: