Agilent Technologies 54835A, Руководство по обслуживанию, Страница: 53 / 208

Chapter 3: Testing Performance
To test bandwidth
3–15
19
Repeat steps 4 through 18 for the remaining channels, setting the parameters of the
channel being tested where appropriate.
Real Time Test
20
Select Acquisition from the Setup menu.
21
Select Real Time sampling mode, 8 GSa/s (Agilent 54845A and 54846A) or 4 GSa/s
(Agilent 54835A) configuration, then click Close.
22
Repeat steps 4 through 19, testing channels 1 and 3 to the 2.25 GHz limit (54846A), 1.5
GHz limit (Agilent 54845A), or the 1.0 GHz limit (Agilent 54835A).
23
Select Acquisition from the Setup menu.
24
Select the 4 GSa/s configuration (Agilent 54845A and 54846A) or 2 GSa/s configuration
(Agilent 54835A), then click Close.
25
Repeat steps 4 through 19, testing channels 1, 2, 3, and 4 to the 1 GHz limit (Agilent
54845A and 54846A) or the 500 MHz limit (Agilent 54835A).
1 M
Ω
, 500 MHz Test on 54835A, 54845A, and 54846A
26
Disconnect the power splitter from the channel input.
27
Select Acquisition from the Setup menu.
28
Select Equivalent time Sampling Mode and click Close.
29
Connect the Agilent 1161A 10:1 probe to channel 1. Verify that the probe compensation
is correct.
30
Change channel to 100 mV/div using the knob.
31
Connect the probe tip to the power splitter using the probe-tip-to-BNC adapter and 50
Ω
termination.
32
Repeat steps 5 through 19, testing the 500 MHz limit on channels 1, 2, 3, and 4.
If the test fails
Failure of the bandwidth test can be caused by a faulty attenuator or main assembly. A self calibration
may correct a bandwidth failure.