Measurements
R&S
®
RTO6
330
User Manual 1801.6687.02 ─ 05
Remote command:
MEASurement<m>:AMPTime:ARIThmetic:COUNit
MEASurement<m>:SPECtrum:ARIThmetic:COUNit
8.2.5.4
Measuring the delay to trigger
Delay to trigger measures the time between the trigger point and the following slope of
a waveform. If the delay is unknown, it can be measured in two stages - first a coarse
and then a precise measurement.
See also:
"Delay to trigger measurement settings"
1. Set the horizontal scale and horizontal position so that the trigger point and the
slope both are visible on the screen.
2. Select the delay to trigger measurement:
a) In the "Setup" dialog, set the "Category" to "Amp/Time".
b) Press "Add/ Remove Measurements" button.
c) In the dialog, enable "Delay to trigger".
d) Tap "Back".
3. Configure the "Delay to trigger" measurement:
a) In the "Active Measurements" list, tap the "Delay to trigger" measurement.
b) Select the source, that is the waveform with the delayed slope.
c) Select the slope and the reference level.
d) Check the trigger settings.
4. Enable the measurement. Note the result.
5. Turn the horizontal [Position] knob and enter the measured delay as horizontal
position.
Thus, the slope is moved to the center of the screen.
6. Adjust the time scale ("Menu" > "Horizontal" > "Setup" tab) and the sample rate
and resolution ("Menu" > "Acquire" > "Setup" tab) to the required resolution.
The trigger is outside the display and is not part of the current acquisition.
7. Repeat the "Delay to trigger" measurement.
Now the delay is measured with high accuracy. You can analyze the variance of
delay values using statistical evaluation and histogram functions.
8.2.6
Eye diagram measurements
The eye diagram is a tool for evaluation of signal quality and shows the combined
effects of channel noise and intersymbol interference. It is a significant means of visu-
alizing jitter and allows you to analyze the reasons for it. By creating histograms of the
eye diagram, important jitter parameters can be determined.
Automatic measurements
