HP 54520 Series Service Manual page 60

oe
a
a
oo@.
10
11
12
me OO
Chapter 3: Testing Performance
To test trigger sensitivity
Set the signal frequency to 100 MHz and output level for 0.5 divisions of vertical
deflection.
The voltage markers can be used to set a 0.5 divreference. Press Marker and turn
the markers on. Set source x1, yl and source x2, y2 to the channel being tested. Set the
yl marker to +50 mV and the y2 marker to -50 mV.
Adjust the trigger level for a stable display.
The test passes if triggering is stable. Record the result in the Performance Test
Record.
Set the signal frequency to 500 MHz and the output level for 1.0 division of vertical
deflection.
Set the horizontal to 1 ns/div.
Adjust the trigger level for a stable display.
The test passes if triggering is stable. Record the result in the Performance Test
Record.
Connect the signal generator to the channel 2 input.
Set up the oscilloscope.
Menu (hardkey) Function/Parameter Setting
Vertical 1 off
(channel key) 2 on
Horizontal (time/div) 5 ns/div
Trigger source 2
(Setup)
Test the other channels.
e For the HP 54520 and 54722, repeat steps 2 through 9 for channel 2.
e For the HP 54540 and 54742, repeat steps 2 through 11 for channels 2, 3, and 4, setting the
tested channel's parameters where appropriate.
External Trigger Test
This test is necessary only for the HP 54520A and 54522A.
Connect the equipment.
a With the N cable, connect the signal generator to the power splitter input.
b Using an N-to-BNC adapter and BNC cable, connect one splitter output to the
channel | input.
¢ Press the channel 1 select button and set the input resistance to 50 2.
d Connect the second splitter output to the Ext trigger input.
Set the signal generator frequency to 100 MHz and output level to 32 mVrms
(90 mVp-p from the generator, 45 mVp-p into the trigger).
Press Autoscale .
Pressthe =xt trigger button (bottom row) and set the range to +1 V and the
input resistance to 50© pe.
Press the Trigger setup and set the source to External.
3-16