5-2 VNA Mode Bias Tee Operational Check, Option 10 Chapter 5 — Option Verification
5-2 PN: 10580-00324 Rev. N S412E MM
Voltage and Current Test
8. Connect the 105 Ohm Load to VNA Port 2 connector of the S412E.
9. Ensure that the Int Voltage P2 setting is 12.0 V.
10. Touch the Bias Tee submenu button and then touch the On submenu button to turn the Bias Tee On.
11. Verify the voltage and current readings displayed on the upper left corner of the screen are within the
range shown in Table 5-1.
12. Touch the Off submenu button to turn the Bias Tee Off. Touch the Back submenu button to return to
previous menu.
13. Touch the Int Voltage P2 submenu button. Use the numeric keypad to enter 18, and then touch the
V submenu button to change the voltage to 18.0 V.
14. Repeat Step 10 through Step 12.
15. Remove the 105 Ohm Load from VNA Port 2 and connect the 78 Ohm Load to VNA Port 2.
16. Touch the Int Voltage P2 submenu button. Use the numeric keypad to enter 32, and then touch the
V submenu button to change the voltage to 32.0 V.
17. Repeat Step 10 through Step 12.
18. Remove the 78 Ohm Load from the VNA Port 2 connector.
Fault Test
19. Connect the Short of the Calibration Tee to VNA Port 2.
20. Change Int Voltage P2 to 12.0 V.
21. Touch the Bias Tee submenu button and then touch the On submenu button to turn the Bias Tee On.
22. Verify that the instrument displays the Bias Tee voltage, and that the current reading in the upper-left
corner of the screen is flashing 0.0 V and 0mA.
23. Touch the Off submenu button to turn the Bias Tee off.
Table 5-1. VNA Bias Tee Verification
Current Reading 12.0 V 18.0 V 32.0 V
Expected Voltage 10.8 V to 13.2 V 16.2 V to 19.8 V 28.8 V to 35.2 V
Expected Current 85 mA to 145 mA 142 mA to 202 mA 370 mA to 450 mA
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