Agilent Technologies 54835A, Руководство по обслуживанию, Страница: 59 / 208

Chapter 3: Testing Performance
To test time measurement accuracy
3–21
Real-Time Mode Procedure
This procedure continues from the previous one.
1
Change the signal generator frequency to 25.31646 MHz (39.49999 ns period).
2
Select Acquisition from the Setup menu.
3
Select Real Time sampling mode. Set Configuration to 8 GSa/s (Agilent 54845A) or
4 GSa/s (Agilent 54835A). Set Sampling Rate to Manual, 8 GSa/s (Agilent 54845A) or
4 GSa/s (Agilent 54835A). Enable Averaging with the number of points set to 16. Set
Memory Depth to Automatic. Click Close.
See figure 3-14.
Figure 3-14
Acquisition Setup for Real Mode Procedure (showing Agilent 54845A)
4
Set sweep speed to 50 ns/div with horizontal position at 0.0 s.
5
Select Measurement Definitions from the Customize submenu of the Measure menu.
(If you have code Revision A.03.00 or higher, select Delta Time from the Measurements
Definitions submenu of the Measure menu.)
6
Set To Edge # to 11 with Direction Rising and Threshold Middle. Click Close.
See figure 3-15.
Figure 3-15
Measurement Definitions for Real Mode Procedure