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Selecting a sensor tip cable
Table 6: Sensor tip selection table
Most sensitive
Sensor tip
V/div setting
IVTIP50X
50 mV/div
IVTIP25X
25 mV/div
IVTIP10X
10 mV/div
IVTIP5X
5 mV/div
IVTIP1X
1 mV/div
1
On 1X range
2
On 2X range
TIVM Series Measurement System User Manual
CAUTION.
Avoid over-voltage conditions that can damage or degrade the sensor
head input termination by selecting the wrong sensor tip cable. The sensor head
SMA input is a 50 Ω terminated input. Selecting the correct sensor tip cable
attenuation factor is crucial to ensure that the sensor head input termination is not
degraded or damaged by an over-voltage condition. Select the sensor tip cable
that will provide the highest attenuation possible for the signal being measured.
This also provides the highest differential impedance to the circuit-under-test.
When selecting a sensor tip cable for a particular application, consider the
following questions:
What is the maximum RMS/Peak Voltage at the test point being measured
(for example, under a fault condition)?
What is the minimum differential loading (input resistance) that my circuit
can tolerate?
How large of a signal do I want to display at one time on the oscilloscope?
What sensitivity do I need (for example, the minimum V/div setting)?
The following table will help you select the correct sensor tip. Start at the top of
the table and work down. Choose the first tip that meets all of your criteria.
Differential input specifications
Linear voltage
1
range
2
±50 V (100 V
)
p-p
±25 V (50 V
)
p-p
±10 V (20 V
)
p-p
±5 V (10 V
)
p-p
±1 V (2 V
)
p-p
Maximum
Maximum
non-destruct
non-destruct
voltage (RMS)
voltage (Peak)
35 V
200 Vpk
rms
25 V
107.5 Vpk
rms
16 V
43 Vpk
rms
12 V
21.5 Vpk
rms
3 V
4.3 Vpk
rms
Operating information
Differential input
resistance
2.5 kΩ
1.25 kΩ
500 Ω
250 Ω
50 Ω
19
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Troubleshooting
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