Time Base Marker Calibration Procedure For An Oscilloscope - Fluke 5520A Operator's Manual

•
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:
sine
spike
square
sq20%
•
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).
You can also toggle the trigger off and on by pressing T.
•
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.

8-41. 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.
Output at SCOPE
terminal (50Ω)
f
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.
Selection Period (Frequency)
10 ns - 2 ns (100 MHz - 500 MHz)
5s - 20 ns (0.2 Hz - 50 MHz)
5s - 10 ns (0.2 Hz - 100 MHz)
20 ms - 100 ns (50 kHz - 10 MHz)
SHAPE
spike
f f
5520A-SC600 Option
Calibrating the Time Base of an Oscilloscope
TRIG MODE
off marker
f f
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