Agilent Technologies 2000 X, Руководство по обслуживанию

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Testing Performance 2
2000/3000 X-Series Oscilloscopes Service Guide 53
9 Change the signal generator output frequency according to
the maximum frequency for the oscilloscope using the
following:
• 1 GHz Models: 1 GHz
• 500 MHz Models: 500 MHz
• 350 MHz Models: 350 MHz
• 200 MHz Models: 200 MHz
• 100 MHz Models: 100 MHz
• 70 MHz Models: 70 MHz
10
Referencing the frequency from step 9, set the power
meter Cal Factor % to the frequency value on the
calibration chart on the power sensor.
11 Set the oscilloscope sweep speed according to the
following:
• 1 GHz Models: 500 ps/div
• 500 MHz Models: 1 ns/div
• 350 MHz Models: 2 ns/div
• 200 MHz Models: 2 ns/div
• 100 MHz Models: 5 ns/div
• 70 MHz Models: 5 ns/div
12
Note the oscilloscope Std Dev(1) reading at the bottom of
the screen.
13 Note the reading on the power meter and covert to Vrms
using the expression:
14
Calculate the response using the expression:
Example
If:
Pmeas
1_MHz
= 892 uW
Std Dev(n)
1MHz
= 210.4 mV
Vin
maxfreq
Pmeas
maxfreq
50
Ω ×
=
response(dB) = 20 log
10






MHz 1 M Hz 1
freq max freq max
Vin / Vout
Vin / Vout