Other topics about Setting Up the Display of Measurement Results
Activate the trace you want to auto-scale.
Press Scale > Auto Scale to auto-scale the specific active trace. This adjusts the scale of the trace so that you can easily examine the overall characteristics while making all of the data visible within the graph.
Activate the trace you want to auto-scale.
Press Scale > Auto Scale All to auto-scale the all the traces.
This section describes how to manually scale the active trace for a Cartesian-coordinate graph. Note that these procedures do not apply when the Keysight E4990A is configured to perform a COMPLEX Z-Y measurement (complex impedance for Trace 1, complex admittance for Trace 2).
When the vertical axis is linear, you can scale the trace by first specifying where to position the reference line and what value to assign to it and then setting the scale for each division.
Activate the trace you want to manually scale.
Press Scale > Reference Position, and input the desired value that represents where the reference line should be positioned in relation to the bottom of the graph. This value ranges from 0 (bottom) and 10 (top). In the preset state, the reference line position defaults to 5, which means that it is displayed at the center of the graph.
The reference line is a horizontal dotted line displayed in the same color as the corresponding trace.
Press Scale > Reference Y Value, the input the desired value that indicates the reference value, that is, the value of the measurement parameter that corresponds to the reference line position.
Alternatively, when you have the main marker displayed on the trace, press Marker Fctn > Marker Reference to use the value at the marker position as the reference value. Thus, you can change the trace scale by placing the reference line at the position indicated by the main marker.
Press the Scale > Scale/Div, and input the desired value that indicates the scale per division.
When the vertical axis is set to logarithmic, you can scale the trace by specifying the highest (top) and lowest (bottom) values displayed within the graph.
Activate the trace you want to manually scale.
Press Scale >Log-Y Top and input the desired value indicating the top value to be displayed on the graph.
Press Scale >Log-Y Bottom and input the desired value indicating the bottom value to be displayed on the graph.
When your graph is a complex plane, you can manually scale the active trace by specifying the reference values for the vertical and horizontal axes as well as the scale per division.
Activate the trace you want to manually scale.
Press Scale > Reference X Value, and input the desired value that indicates the reference value for the horizontal (X) axis. This value is a real value. The reference line for the horizontal axis in a complex plane is stationary in the center of the axis.
Press Scale > Reference Y Value, and input the desired value that indicates the reference value for the vertical (Y) axis. This value is a complex value. The reference line for the vertical axis in a complex plane is stationary in the center of the axis.
Press the Scale > Scale/Div, and input the desired value that indicates the scale per division. For a complex plane, both the vertical and horizontal axes use the same scale per division.
When your graph is a polar chart, you can scale the active trace by specifying the full scale value, that is, the distance from the origin to the outermost circle.
Activate the trace you want to manually scale.
Press Scale > Divisions, and input the desired value that indicates the full scale value. Divisions defines the number of divisions on the Y-axis. An even number from 4 to 30 can be used.
Alternatively, when you have the main marker displayed on the trace, press Marker Fctn > Marker Reference to use the value at the marker position (i.e., the distance from the origin) as the full scale value. Thus, you can change the trace scale by placing the full scale circle at the position indicated by the main marker.
Activate the trace you want to perform reference tracking.
Press Scale > Reference Tracking.
Press Tracking > OFF|Track Peak|Track Freq to select between turning OFF the reference tracking option, track by peak reference or track by frequency.
Press Track Frequency, and input the desired frequency value.