5500A-SC300 Option
Calibrating the Time Base of an Oscilloscope
8
8-81
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.
gl034i.eps
Perform the following sample procedure to calibrate the time base.
1. Connect the calibrator to Channel 1 on the oscilloscope. Select 50 Ω impedance or
use an external 50 Ω 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 .
Note
You may enter the equivalent frequency instead of the time marker value.
For example, instead of entering 200 ns, you may enter 5 MHz.
Set your oscilloscope’s time base to show 10 time markers. The time markers should
align with the oscilloscope divisions, as shown in the example below. For an
accurate reading, align the signal’s peaks with the horizontal center axis.
Peaks are aligned
with center axis
gl011i.eps
4.
4. Repeat this procedure for all time marker values recommended for your
oscilloscope. Repeat for digital and analog mode as required. Some oscilloscopes
may need the magnification changed while calibrating in analog mode.
5. Remove the signal by pressing Y.
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