B. Operator Performance Checks
B.4.3 Pulse Amplitude Check
1. Pulse amplitude measurement should be taken with a device that can accurately measure
frequency, pulse width, period, and amplitude.
2. Set the device input impedance to 50 ohms.
3. Connect one end of the 36 in. reference cable to a capable pulse measurement device and the
other end of the 36 in. reference cable to the CT100B front panel cable connector. A trace
should appear on the device display.
4. Switch the CT100B into the Short pulse setting from the Main menu Cable Len setting.
5. Measure the pulse amplitude coming off the front panel cable connector. The averaged pulse
amplitude into 50 ohms should be between 290 mV and 310 mV.
6. Repeat pulse amplitude comparison for Medium and Long settings.
B.4.4 Pulse Width Check
1. Pulse width measurement should be taken with a device that can accurately measure
frequency, pulse width, period, and amplitude.
2. Set the device input impedance to 50 ohms.
3. Connect one end of the 36 in. reference cable to a capable pulse measurement device and the
other end of the 36 in. reference cable to the CT100B front panel cable connector. A trace
should appear on the device display.
4. Switch the CT100B into the Short pulse setting from the Main menu Cable Len setting.
5. Measure the pulse width coming off the front panel cable connector. The average pulse width
should be between 1.000-2.000 µsec for Short, 5.000-6.000 µsec for Medium, and
20.00-21.00 µsec for Long.
6. Repeat pulse width check for Medium and Long settings.
B.4.5 Pulse Repetition Period Check
1. Pulse repetition rate measurement should be taken with a device that can accurately measure
frequency, pulse width, period, and amplitude.
2. Set the device input impedance to 50 ohms.
3. Connect one end of the 36 in. reference cable to a capable pulse measurement device and the
other end of the 36 in. reference cable to the CT100B front panel cable connector. A trace
should appear on the device display.
4. Switch the CT100B into the Short pulse setting from the Main menu Cable Len setting.
5. Measure the pulse repetition rate coming off the front panel cable connector. The average
pulse repetition rate should be 4.000±0.02 µsec for Short, 20.00±0.02 µsec for Medium, and
80.00±0.02 µsec for Long.
6. Repeat pulse repetition period check for Medium and Long settings.
B.4.6 Pulse Frequency Check
1. Pulse frequency measurement should be taken with a device that can accurately measure
frequency, pulse width, period, and amplitude.
2. Set the device input impedance to 50 ohms.
CT100B TDR Cable Analyzers Operator’s Manual 117
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