Agilent Technologies Infiniium 80000 Series Service Manual page 61

Chapter 4: Testing Performance
Analog Bandwidth - Maximum Frequency Check
Change the scope set up as follows:
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a Change the channel vertical sensitivity to 10 mV/div.
b Reset the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz waveform).
Change the generator output as follows:
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a Reset the generator frequency to 50 MHz.
b Change the amplitude to the value suggested for this sensitivity in Table 3-1.
Repeat steps 8, 9, and 10 to measure the reference gain at 50 MHz for this sensitivity.
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Repeat steps 11, 12, 13, and 14 to measure the gain at maximum frequency for this
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sensitivity.
Repeat steps 15 to 19 to complete measuring gains for remaining sensitivities for
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channel 1 in the Analog Bandwidth - Maximum Frequency Check section of the
Performance Test Record.
Move the splitter to channel 2 and change the scope configuration as follows:
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• Ensure Channel 2 is displayed and all other channels are turned off.
• Set the vertical sensitivity of channel 2 to 5 mV/div.
• Set the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz waveform).
• Right click on the V rms measurement at the bottom of the screen. When the RMS voltage
measurement setup window is displayed, change the source from Channel 1 to Channel 2.
Repeat steps 7 to 20 to complete measuring gains for channel 2.
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Move the splitter to channel 3 and change the scope configuration as follows:
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a Ensure Channel 3 is displayed and all other channels are turned off.
b Set the vertical sensitivity of channel 3 to 5 mV/div.
c Set the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz waveform).
d Click on the V rms measurement at the bottom of the screen and select Customize. When
the V rms setup window is displayed, change the source from Channel 2 to Channel 3.
Repeat steps 7 to 20 to complete measuring gains for channel 3.
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Move the splitter to channel 4 and change the scope configuration as follows.
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a Ensure Channel 4 is displayed and all other channels are turned off.
b Set the vertical sensitivity of channel 4 to 5 mV/div.
c Set the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz waveform).
d Click on the V rms measurement at the bottom of the screen. When the V rms setup
window is displayed, change the source from Channel 3 to Channel 4.
Repeat steps 7 to 20 to complete measuring gains for channel 4.
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