Specifications

3-18
Testing Performance
To verify trigger sensitivity
Test Internal Trigger Sensitivity
1
Press the Save/Recall key, then press the Default Setup softkey.
2 Connect the oscilloscope calibrator output to the oscilloscope
channel 1 input.
3 Verify the trigger sensitivity at 25 MHz and <10 mV/div.
a Set channel 1 Coupling to DC and Imped to 50 Ohm.
a Set the output of the calibrator to 25 MHz, and set the amplitude to about
10 mV
p-p
.
b Press the Autoscale key.
c Set the time base to 10 ns/div.
d Set channel 1 to 5 mV/div.
e Decrease the output of the calibrator until 1 vertical division of the signal
is displayed.
The trigger is stable when the displayed waveform is stable. If the trigger is
not stable, try adjusting the trigger level. If adjusting the trigger level makes
the trigger stable, the test still passes. If adjusting the trigger does not help,
see the “Troubleshooting” chapter. Then return here.
f Record the result as Pass or Fail in the Performance Test Record.
4
Verify the trigger sensitivity at maximum bandwidth and ≥10 mV/div
division.
a Change the output of the calibrator to 500 MHz for the 54642A/42D or
350 MHz or the 54641A/41D, and set the amplitude to about 100 mV
p-p
.
b Set the time base to 1 ns/div.
c Set channel 1 to 100 mV/div.
d Decrease the output of the calibrator until 0.6 vertical division of the signal
is displayed.
The trigger is stable when the displayed waveform is stable. If the trigger is
not stable, try adjusting the trigger level. If adjusting the trigger level makes
the trigger stable, the test still passes. If adjusting the trigger does not help,
see the “Troubleshooting” chapter. Then return here.
e Record the result as Pass or Fail in the Performance Test Record.
5
Repeat this procedure for channel 2.
service.book Page 18 Wednesday, August 28, 2002 3:25 PM