Agilent Technologies 54657A Dokumentacja Strona 109

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External Trig
Sensitivity
6 Verify the external trigger sensitivity at 500 MHz, 150 mV p-p and at
100 MHz, 75 mV p-p.
a Press Source , then press the Ext softkey.
bc Press External Trigger
, then toggle Input softkey to 50 .
c Press 1
then toggle Input softkey to 50 .
d Using the power splitter, connect one power splitter to output to the
channel 1 input and the other power splitter output to the power
sensor.
e Set the power meter Cal Factor to the 500 MHz value from the chart
on the power sensor.
f Set signal generator frequency to 500 MHz and adjust the output
amplitude to achieve a power meter reading of 0.075 mW. (This
corresponds to 150 mV p-p.)
g Set Time/div to 1 ns/div.
h Disconnect power meter from the power splitter and connect the
power splitter output to External Trigger Input.
i Check for stable triggering, adjusting trigger level if necessary.
j Record results in the Performance Test Record as Pass or Fail.
If the test fails, refer to "Troubleshooting the Oscilloscope" on page
4-32.
k Change the signal generator frequency to 100 MHz at output amplitude of
75 mV p-p, as measured with the 54615B/16B/16C (channel 1). Press
Voltage , then the softkey Vp-p
.
l Set Time/div to 10 ns/div.
m Check for stable triggering, adjusting trigger level if necessary.
n Record results in the Performance Test Record as Pass or Fail.
If test fails, refer to "Troubleshooting the Oscilloscope" on page 4-32.
Service
Verifying Oscilloscope Performance
4-17
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