Agilent 4155B/4156B User’s Guide Vol.2, Edition 5 3-13
Measurement Functions
Knob Sweep Function
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
To set the VAR1 range, refer to VAR1 RANGE softkey description in “VA R 1
SETUP Softkey” on page 3-20. 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.
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