User`s guide

Agilent 4155C/4156C User’s Guide Vol.2, Edition 6 2-5
Knob Sweep Measurements
Measurement Functions
Features of Knob Sweep Function
The following are parameters that are for knob sweep measurement only or that
have a different meaning or range from normal sweep measurement.
LIN/LOG mode
Only linear mode is available. Even if you set LOG on the MEASURE: SWEEP
SETUP screen, the knob sweep is a linear sweep measurement.
VAR1 Range
Sweep range of VAR1 source output. If you do not set the VAR1 RANGE, the
default is the stop value specified for the VAR1 channel on the MEASURE: SWEEP
SETUP screen.
Polarity
The following sweep polarities are available for the knob sweep function of the
VAR1 source. To set the polarity, select VAR1 SETUP and POLARITY softkeys.
+ (positive) Used to set the sweep output in the positive X direction.
- (negative) Used to set the sweep output in the negative X direction.
+/- (bipolar) Used to set the sweep output in both the positive and negative X
directions.
To increase the source absolute value, rotate the rotary knob in clockwise.
To decrease the source value toward 0, rotate the rotary knob in counterclockwise.
When measurement curves reach 0, the curves remain at 0 even if you continue to
rotate the rotary knob counterclockwise.