SC1100 Oscilloscope Calibration Option
How to Calibrate the Pulse and Frequency Response on an Oscilloscope10
10-15
1. Connect the Calibrator to Channel 1 on the oscilloscope. Select 50 Ω impedance or
use a 50 Ω termination directly at the oscilloscope input. Verify that the O key is
lit, indicating that the signal is connected.
2. Alter the voltage setting for the signal so it matches the amplitude value
recommended by your oscilloscope manufacturer for calibrating the edge response.
The default setting is 25.00 mV p-p, 1.0000 MHz.
For example, on an HP 54522C oscilloscope, start with a signal of 1 V @ 1 MHz.
3. Adjust the scale on your oscilloscope to achieve a good picture of the edge.
4. Adjust the time base on your oscilloscope to the fastest position available (20.0 or
50.0 ns/div).
Pulse aberrations
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5. Verify that your oscilloscope exhibits the proper rise time and pulse aberration
characteristics.
6. Remove the input signal by pressing Y.
Pulse Response Calibration Using a Tunnel Diode Pulser
You can use the calibrator to drive a tunnel diode pulser (Fluke Part Number 606522, or
Tektronix 067-0681-01, or equivalent), allowing you to check for pulse edge rise times as
fast as 125 ps.
The calibrator sources a maximum pulser drive signal of 100 V p-p at 100 kHz. The
recommended (and default) output setting is 80 V p-p at 100 kHz.
Perform the following procedure to use a tunnel diode pulser:
1. Connect the calibrator, tunnel diode pulser, and oscilloscope as shown in Figure 10-2.
2. With the SC1100 Option in EDGE mode, press the TDPULSE softkey to “on”.
3. Press O.
4. Rotate the control on the pulser box to the minimum setting necessary to trigger a
reading.
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