Keysight Technologies InfiniVision 6000L Series, Service Manual

Page: 43 / 100

Testing Performance
2
6000L Series Oscilloscopes Service Guide 43
2 Verify the trigger sensitivity at maximum bandwidth.
1 GHz models: 1 GHz
500 MHz models: 500 MHz
100 MHz models: 100 MHz
a Press the
Save/Recall
key, then press the
Default Setup
softkey.
b On 500 MHz and 1 GHz models, set channel 1
Imped
to
50 Ohm
.
c Set the output frequency of the signal generator to the maximum bandwidth
of the oscilloscope and set the amplitude to about 10 mV
pp
.
d Press the
AutoScale
key.
e Set the time base to 10 ns/div.
f Set channel 1 to 5 mV/div.
g Decrease the amplitude from the signal generator 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.
h Record the result as Pass or Fail in the Performance Test Record (see
page 46 ).
3 Repeat this procedure for the remaining oscilloscope channels.
Test External Trigger Sensitivity
The following test is optional because External Trigger Sensitivity is a
characteristic, not a specification.
Verify the external trigger sensitivity at these settings:
• 1 GHz and 500 MHz bandwidth models:
500 MHz, 500 mV
pp
• 100 MHz bandwidth models:
100 MHz, 500 mV
pp
1 Connect the equipment (see Figure 7 ).
a Use the N cable to connect the signal generator to the power splitter input.
b Connect one output of the power splitter to the Aux Trig input through a 50 Ω
feedthrough termination.
c Connect the power sensor to the other output of the power splitter.