Rise Time - Cal Test Electronics CT4447 Series User Manual

CT4447 Series High-Voltage Differential Probes User Manual

Rise Time

1. Verify that the pulse generator output is off and then connect the probe to the oscilloscope input
channel.
2. Connect the probe inputs, through the adapters shown below, to the pulse generator output. Set
the probe input leads straight and parallel for best signal response.
5
1 Trig In
Oscilloscope
3. Connect pulse generator output trigger to oscilloscope trigger input.
4. Set the output of the pulse generator to 50 V, 1 kHz, and 200 ns pulse output. Note: the probe input
voltage will be 25 V due to the 6 dB (2x) attenuator in the circuit.
5. Set the oscilloscope to 5 V/div, 10 ns/div, BW = full, average = 16.
6. Set the probe attenuation to the first range listed in the table below.
7. Enable the pulse generator output and check that the rise time does not exceed the target rise time
value listed in the table. Use the auto-measure feature of the oscilloscope to determine the rise
time.
8. Record the rise time in the table.
9. Set the probe attenuation to the next range and adjust the vertical volts/div to display the signal.
10. Record the rise time in the table and disable the pulse generator output.
Table 9 Rise Time Test Equipment Settings
Probe
Model Range
CT4447-1 10x
CT4447-1 100x
CT4447-2 20x
CT4447-2 200x
Lorem ipsum
3
BNC cable
BNC m to double
banana jacks
6
Differential Probe
Pulse Generator Output
Voltage Frequency
50 V 1 kHz
50 V 1 kHz
50 V 1 kHz
50 V 1 kHz
Pulse Generator
1
Sync Out
4
BNC 6dB (2x)
Attenuator
BNC f-f
BNC 50Ω Feed-thru
Terminator
Probe Output
Expected (ns)
11.7 ns
11.7 ns
11.7 ns
11.7 ns
Out
SMA m to
BNC f
2
BNC cable
RT01-A-451043001
Measured (ns)
25