Fluke 5520A Manual page 28

Manual Supplement
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SHAPE Indicates the type of waveform. Depending on frequency setting, possible selections are
sine, spike, square (50% duty cycle square wave), and sq20% (20% duty cycle square wave.) Note
that selections available under SHAPE depend on the selected marker period (frequency), as follows:
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TRIG If you are using the external trigger, use this key to cycle through the trigger settings. The
available trigger settings are: off, /1 (trigger signal appears on each marker), /10 (trigger signal
appears on every tenth marker), and /100 (trigger signal appears at every 100th marker).
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MODE Indicates you are in MARKER mode. Use the softkey to change modes and open menus for
other oscilloscope calibration modes.
Default marker values are 1.000 ms, SHAPE = spike.
The X and D keys step the voltages through cardinal point values of an oscilloscope in a 1-2-5
step sequence. For example, if the period is 1.000 ms, pressing X increases the period to the nearest
cardinal point, which is 2.000 ms. Pressing D decreases the voltage to the nearest cardinal point,
which is 500 μs.
8-108. Time Base Marker Calibration Procedure for an Oscilloscope
This sample procedure uses the Time MARKER function to check the horizontal deflection (time base) of
your oscilloscope. See your oscilloscope's manual for the exact time base values recommended for
calibration.
Before you begin this procedure, verify that you are in MARKER mode. If you are, the Control Display
shows the following menu.
Perform the following sample procedure to calibrate the time base:
1. Connect the calibrator to Channel 1 on the oscilloscope. Select 50Ω impedance or use an external
50Ω termination. Make sure the oscilloscope is dc-coupled.
2. Apply a time marker value according to the recommended calibration settings in your oscilloscope
manual. For example, to enter 200 ns, press 200bjbH, then press E.
11/10
Selection
sine
10 ns - 2 ns (100 MHz - 500 MHz)
spike
5s - 20 ns (0.2 Hz - 50 MHz)
square
5s - 10 ns (0.2 Hz - 100 MHz)
sq20%
20 ms - 100 ns (50 kHz - 10 MHz)
Output at Scope
Ω)
terminal (50
f f
Period (Frequency)
SHAPE TRIG
spike off
f f
27
5520A Operator
MODE
marker
f