Tektronix WCA200A, User Manual

Page: 221 / 454

Time Analysis (Time Mode)
WCA230A & WCA280A User Manual
3- 95
The L
0
, L
1
, L
A
, and L
B
lines represent the following:
H
L
0
: Tangent line through the threshold point on the rising edge
H
L
1
: Tangent line through the threshold point on the falling edge
H
L
A
: Regression line calculated on the pulse top
H
L
B
: Regression line calculated on the pulse bottom
These lines are displayed in red in the subview. The pulse-on and -off times are
determined by the nodes of these lines as shown in Figure 3--70.
Use this procedure to perform the pulse measurements:
1. Press the TIME key on the front panel.
2.
Press the side key
Pulse Measurement
→
Pulse Characteristics
.
3. Display the measurement waveform:
a. Press the FREQUENCY/CHANNEL key on the front panel to set the
frequency.
b.
Press the
SPAN
key on the front panel to set the span.
c. Press the AMPLITUDE key on the front panel to set the amplitude.
For information about setting frequency, span, and amplitude, refer to Setting
Frequency and Span on page 3--119 and Setting Amplitude on page 3--127.
4.
For the channel power, OBW, and EBW measurements only:
You can select an FFT window for the measurement.
Refer to RBW/FFT Menu on page 3--97.
5. Press the TIMING key on the front panel to set the analysis range.
Refer to page 3--30 for details on setting analysis range.
6.
Press the VIEW:
DEFINE
key on the front panel to select the measurement
item(s) for display. Refer to page 3--97 for the View Define menu.
By default, only the pulse-width measurement result is displayed on screen.
7. Press the MEAS SETUP key on the front panel to set the measurement
parameters. Refer to page 3--100 for the Meas Setup menu.
Basic Measurement
Procedure