User`s guide
Agilent 4155C/4156C User’s Guide Vol.2, Edition 6 2-9
Knob Sweep Measurements
Measurement Functions
Analysis of the Knob Sweep Measurement Results 
On the KNOB SWEEP screen, you cannot use analysis functions and user functions. 
But you can analyze the knob sweep measurement result by quitting knob sweep 
mode as shown below:
1. Select the SETUP COPY primary softkey on the KNOB SWEEP screen.
2. Press the 
Graph/List front-panel key.
The knob sweep results are displayed on the GRAPH/LIST screen. Then you can 
use analysis functions.
To Use User Function
User function is not available for the knob sweep mode. If you want to use user 
functions in GRAPH/LIST screen group after the knob sweep measurements, do 
following before entering to the knob sweep mode:
1. Define user functions on CHANNELS: USER FUNCTION DEFINITION 
screen.
2. Enter user function names in DATA VARIABLES field of DISPLAY: DISPLAY 
SETUP screen.
3. On GRAPH/LIST: GRAPHICS screen, select DISPLAY SETUP primary 
softkey, then set DATA VAR softkey to ON.
After getting the measurement data on the knob sweep mode, and quitting the knob 
sweep mode as described above, the results of user function will be displayed on the 
GRAPH/LIST screen.










