Agilent Technologies 5000 Series - Page 44

44 5000 Series Oscilloscopes Service Guide
2 Testing Performance
2 Set up the oscilloscope.
a Press the Save/Recall key, then press the Default Setup
softkey.
b Set the External Trigger impedance to 50 Ohm.
c Change the trigger Mode from Auto to Normal.
d Use the Range softkey and the Entry knob to set the range
to 1.0 V.
3 Verify the trigger sensitivity at maximum frequency.
a Change the signal generator output frequency:
DSO5052A: 500 MHz
DSO5032A: 300 MHz
DSO5012A: 100 MHz
b Set the power meter Cal Factor % to the appropriate value
(100, 300, or 500 MHz) on the calibration chart on the
power sensor. If necessary, do a linear interpolation if the
correct factor is not included in the power meter’s
calibration chart.
c Adjust the signal generator output for a reading on the
power meter of 100µW. (200 mV
pp
= 70.71mV rms, Power =
Vin
2
/50Ω = 70.71 mV
2
/50Ω = 100µW.)
d Press the Trigger Edge key, then press the Source softkey to
set the trigger source to external trigger.
e 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.
f Record the results as Pass or Fail in the Performance Test
Record (see page 48).
If the test fails, see the “Troubleshooting” chapter. Then
return here.