Max Power and IF Overload Adjustment

This test applies to the following models:

 
  • N991xA, N992xA: Adjust both ports.
  • N993xA: Only adjust Port 1.
  • When a Max Power and If Overload adjustment is performed, it should always be followed by a Source Power adjustment and an Error Terms adjustment.
  • All adjustments will require the CFG Option. Refer to the CFG Option section for more information.

This procedure performs two separate adjustments on the NA source. The first is an adjustment of the default maximum source power level to prevent severe compression in the reflection or test receiver channels when the default maximum power level is selected. The second adds additional attenuation to lower frequency bands to prevent an IF Overload (actually an IF over-range condition at the ADC.).

There are two independent steps to this adjustment. First, Maximum Power is set for the first thirteen bands. This currently covers frequencies up to ~625 MHz. Second, the maximum power is further adjusted in the first four bands (up to ~20 MHz) to prevent the IF signal level from getting so large that it causes the ADC to overflow when converting maximum power level signals. Before the adjustment routine is allowed to begin, the DUT operating temperature is checked to be sure that the internal temperatures have reached a point where the DUT is stable with respect to normal ambient room temperatures.

 

Related test:

Source Power

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 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.

Max Power and IF Overload Adjustment Setup