HP 54645A, User'S And Service Manual

Page: 213 / 301

To verify trigger sensitivity
In this test, you verify the trigger sensitivity by applying 25 MHz to the
oscilloscope. The amplitude of the signal is decreased to the specified levels,
then you check to see if the oscilloscope is still triggered. You then repeat
the process at the upper bandwidth limit.
Test limits:
Internal trigger
1 mV/div to < 10 mV/div
dc to 25 MHz: 1.0 div or 2.0 mV
p-p
25 MHz to 100 MHz: 1.5 div or 3.0 mV
p-p
10 mV/div to 5 V/div
dc to 25 MHz: 0.35 div or 3.5 mV
p-p
25 MHz to 100 MHz: 1.0 div or 10.0 mV
p-p
External trigger
dc to 25 MHz: 50 mV
p-p
25 MHz to 100 MHz: 100 mV
p-p
Table 7-9 Equipment Required
Equipment Critical specifications Recommended
Model/Part
Signal generator 25-MHz and 100-MHz sine waves HP 8656B Option 001
Power splitter Outputs differ < 0.15 dB HP 11667B
Cable BNC, Qty 3 HP 10503A
Adapter N (m) to BNC (f), Qty 3 HP 1250-0780
Feedthrough 50
Ω
, BNC connectors (m) and (f) HP 11048C
Testing, Adjusting, and Troubleshooting
To verify trigger sensitivity
7-24