Real Time Test; Ω , 500 Mhz Test - Agilent Technologies 54835A Service Manual

Repeat steps 4 through 18 for the remaining channels, setting the parameters of the
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channel being tested where appropriate.

Real Time Test

Select Acquisition from the Setup menu.
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Select Real Time sampling mode, 8 GSa/s (Agilent 54845A and 54846A) or 4 GSa/s
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(Agilent 54835A) configuration, then click Close.
Repeat steps 4 through 19, testing channels 1 and 3 to the 2.25 GHz limit (54846A), 1.5
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GHz limit (Agilent 54845A), or the 1.0 GHz limit (Agilent 54835A).
Select Acquisition from the Setup menu.
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Select the 4 GSa/s configuration (Agilent 54845A and 54846A) or 2 GSa/s configuration
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(Agilent 54835A), then click Close.
Repeat steps 4 through 19, testing channels 1, 2, 3, and 4 to the 1 GHz limit (Agilent
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54845A and 54846A) or the 500 MHz limit (Agilent 54835A).
1 M Ω , 500 MHz Test on 54835A, 54845A, and 54846A
Disconnect the power splitter from the channel input.
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Select Acquisition from the Setup menu.
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Select Equivalent time Sampling Mode and click Close.
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Connect the Agilent 1161A 10:1 probe to channel 1. Verify that the probe compensation
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is correct.
Change channel to 100 mV/div using the knob.
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Connect the probe tip to the power splitter using the probe-tip-to-BNC adapter and 50 Ω
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termination.
Repeat steps 5 through 19, testing the 500 MHz limit on channels 1, 2, 3, and 4.
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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.
Chapter 3: Testing Performance
To test bandwidth
3–15