Tektronix IsoVu TIVM Series, User Manual

Page: 28 / 82

Operating information
Connecting to a circuit
WARNING.
This measurement system contains laser sources; exposing these
laser sources may cause laser exposure. Except for the sensor tip cables on the
sensor head, do not remove any plastic or metallic covers from the sensor head
or controller or attempt to disassemble the product.
WARNING.
Do not connect the measurement system to an energized circuit to
avoid the risk of shock. Always de-energize the circuit-under-test before installing
or removing the tip cable from the circuit-under-test.
WARNING. To avoid the risk of electrical shock or RF burns while the DUT
is energized, do not touch the sensor head or sensor tip cable while taking
measurements. Always keep a six (6) inch (15.25 cm) clearance from the sensor
head during the measurement. (See Figure 2 on page 6.)
Be sure to check the maximum ratings and derating curve for more information on
the RF burn hazard zone. (See Figure 1 on page 5.)
CAUTION.
To avoid possible damage to the equipment, do not connect the coaxial
(common) shield of the sensor tip cable or SMA input to the high impedance
portion of a circuit. The additional capacitance can cause circuit damage.
Connect the coaxial (common) shield to the low impedance section of the circuit.
NOTE. Touching the sensor head or sensor tip cable when measuring a high
frequency, high voltage common mode signal increases the capacitive coupling
and can degrade the common mode loading on the circuit-under-test.
10 TIVM Series Measurement System User Manual