Agilent Technologies 54853A, Руководство по обслуживанию, Страница: 66 / 194

Chapter 3: Testing Performance
Analog Bandwidth - Maximum Frequency Check
3–22
16
Change the scope set up as follows:
a Change the channel vertical sensitivity to 20 mV/div.
b Reset the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz waveform).
17
Change the generator output as follows:
a Reset the generator frequency to 50 MHz.
b Change the amplitude to the value suggested for this sensitivity in Table 3-1.
18
Repeat steps 8, 9, and 10 to measure the reference gain at 50 MHz for this sensitivity.
19
Repeat steps 11, 12, 13, and 14 to measure the gain at maximum frequency for this
sensitivity.
20
Repeat steps 15 to 19 to complete measuring gains for remaining sensitivities for
channel 1 in the Analog Bandwidth - Maximum Frequency Check section of the
Performance Test Record.
21
Move the splitter to channel 2 and change the scope configuration as follows:
• Ensure Channel 2 is displayed and all other channels are turned off.
• Set the vertical sensitivity of channel 2 to 10 mV/div.
• Set the horizontal scale to 16 ns/div (to display 8 cycles of a 50MHz 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.
22
Repeat steps 7 to 20 to complete measuring gains for channel 2.
23
Move the splitter to channel 3 and change the scope configuration as follows:
a Ensure Channel 3 is displayed and all other channels are turned off.
b Set the vertical sensitivity of channel 3 to 10 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.
24
Repeat steps 7 to 20 to complete measuring gains for channel 3.
25
Move the splitter to channel 4 and change the scope configuration as follows.
a Ensure Channel 4 is displayed and all other channels are turned off.
b Set the vertical sensitivity of channel 4 to 10 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.
26
Repeat steps 7 to 20 to complete measuring gains for channel 4.