56
7000 Series Oscilloscopes Service Guide
2
Testing Performance
2
Set up the oscilloscope.
a
Press the
Save/Recall
key, then press the
Default Setup
softkey.
3
Change the signal generator output frequency to 500 MHz.
4
Set the power meter Cal Factor % to the appropriate
value (500 MHz) on the calibration chart on the power
sensor. If necessary, do a linear interpolation if a
500 MHz factor is not included in the power meter’s
calibration chart.
5
Adjust the signal generator output for reading on the
power meter of 625
μ
W. (500mV
pp
= 176.78mV rms,
Power = Vin
2
/50
Ω
= 176.78 mV
2
/50
Ω
= 625
μ
W.)
6
Press the Trigger
Edge
key, then press the
Source
softkey
to set the trigger source to
External
.
7
Check for stable triggering and adjust the trigger level if
necessary. Triggering is indicated by the
Trig’d
indicator at
the top of the display. When it is flashing, the
oscilloscope is not triggered. When it is not flashing, the
oscilloscope is triggered.
8
Record the results as Pass or Fail in the Performance Test
Record (see
page 57
).
If the test fails, see the “Troubleshooting” chapter. Then
return here.
