Source Power Test

This test applies to the following models:

 
  • N991xA and N992xA: Port 1 is always tested. Port 2 is only tested if Option 211 is installed.
  • N993xA: Only test Port 1 if Option 220 is installed.

This test checks the power level accuracy and power step accuracy of the NA source.

The power level check is performed for various CW frequencies at -15 dBm. Test limits are based on the typical values for Power Level Accuracy.

Power step accuracy is tested in 5 dB increments. The range of -5 to -40 dBm is checked for 2.9 GHz and 8.95 GHz. The range of -10 to -40 dBm is checked for 17.5 GHz. The test limits are based on measurements made on a population of properly adjusted units.

The E9304A Option H20 power sensor is used below 18 GHz. The N8485A is used above 18 GHz.

Test type:

functional

Related specification:

power level accuracy (typical)

Related adjustment:

Source Power & Max Power and IF Overload

 

Required Test Equipment

Test Equipment

Recommended Model Number
(see main equipment list for alternative models)

Power Meter

N1914A

Power Sensor

E9304A Opt H20

Power Sensor
(for N9918A, N9928A, N9938A)

N8485A

Power Sensor Cable

11730A

Connection Setups

The following notes apply to illustrations in the FieldFox Help:

  • Only a single representative model will be shown.
  • Some illustrations may differ than those in TME.

  • For procedures that apply to multiple ports, illustrations will show the setup on only one test port.

Source Power Test Setup