Specifications

44 Chapter 3

Setting Measurement Conditions

Set Sweep Conditions

The following section explains how to set the sweep conditions. The sweep condition is a

common parameter to all of traces.

Select Sweep Parameter

The user must select a desired combination of a sweep parameter and a sweep type.

E4991A provides the following combinations of four sweep parameters and three sweep

types.

• Frequency sweep (Linear sweep)

• Frequency sweep (Log sweep)

• Frequency sweep (Segment sweep)

• Oscillator level sweep (Linear sweep)

• dc bias voltage sweep

(Linear sweep)

• dc bias current sweep

(Linear sweep)

Use the following GPIB command to select both sweep parameter and sweep type.

• SWE:TYPE on page 515

NOTE Segment conditions must be set in the segment sweep table before the sweep type is set to

Segment sweep. For details on how to create the segment sweep table, see

“Combination of

Several Sweep Conditions (Segment Sweep)” on page 64.

Set Number of Measurement Points

Use the following GPIB command to set the number of measurement points for one sweep.

• SWE:POIN on page 511

Set Sweep Direction

Use the following GPIB command to set the sweep direction to UP or DOWN.

• SWE:DIR on page 508

*1. Selectable when the E4991A has option 001 (dc bias function) installed.