Testing Performance
2
7000 Series Oscilloscopes Service Guide
53
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:
MSO/DSO7052A/B: 500 MHz
MSO/DSO7032A/B: 350 MHz
MSO/DSO7012A/B: 100 MHz
b
Set the power meter Cal Factor % to the appropriate
value (100, 350 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 100
μ
W. (200 mV
pp
= 70.71mV rms,
Power = Vin
2
/50
Ω
= 70.71 mV
2
/50
Ω
= 100
μ
W.)
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 57
).
If the test fails, see the “Troubleshooting” chapter. Then
return here.
