Tektronix P6249 User Manual

Performance Verification

P6249 4 GHz 5X Active Probe Instruction Manual

This procedure verifies that the probe meets rise time specifications.

The probe rise time is calculated from rise times obtained by
measuring the test system without the probe attached, and the test
system plus the probe.

1. Connect the test equipment as shown in Figure 13.

2. Set the oscilloscope trigger to internal clock.

3. Turn on channel 1 on the SD-24, and then set the oscilloscope

vertical scale to 50 mV/div.

4. Set the oscilloscope horizontal scale to 100 ps/div.

5. Adjust the oscilloscope horizontal and vertical position controls

to display a signal similar to that shown in Figure 13.

11801

1103

Power supply

Calibration

step generator

BNC to SMA adapter

Output

Trigger Input

Generator

remote head

Internal

clock output

Input

Precision coaxial cable

6. Use the oscilloscope measurement capability to display rise time.

Rise time is determined from the 10% and 90% amplitude points
on the waveform. Record the rise time as t

The system rise time (t

) that you measured in step 6 represents the

rise time of the test system without the probe.