Tektronix IsoVu TIVM Series, User Manual

Page: 30 / 82

Operating information
4. Connect the sensor head to the fl exible tripod or a similar support.
This support keeps the sensor head steady reducing the potential mechanical
stresses at the electrical connection point of the DUT. The support also keeps
the sensor head away from surrounding circuits and conductive objects to
minimize the parasitic capacitive coupling to these surroundings.
NOTE.
The mating thread in the sensor head is UNC¼-20. If you use a different
support, make sure that mating thread is UNC¼-20.
Figure 8: Connect the sensor head to the fl exible tripod
NOTE.
To obtain the most accurate measurement, allow the measurement system
to warm up for 20 minutes. Then perform the self calibration before connecting
the tip cable to the DUT and taking the measurement.
5. Connect the MMCX end, of the sensor tip cable to an MMCX connector on
the DUT or to a square pin adapter on the DUT. The adapters connect to
square pins with either 0.100-inch (2.54 mm) spacing or 0.062-inch (1.57 mm)
spacing. (See Figure 28 on page 38.)
6. Set up the controls on the oscilloscope.
7. Apply power to the DUT to take the measurement.
Self calibration
Press the SELF CAL button on the controller to adjust the operating point of the
measurement system for the current range and clamp setting. (This function is not
available in the Probe Setup menu of the oscilloscope.)
NOTE.
Make sure there is no differential voltage present at the sensor tip cable
when performing the self calibration.
12 TIVM Series Measurement System User Manual