Tektronix IsoVu TIVP Series, Руководство пользователя

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Auto Range
In 4, 5, and 6 Series oscilloscopes, the Range Mode is selectable for either Auto Range, or Manual. With the Range Mode
set to Auto Range, the probe range is automatically selected when the V/div knob on the oscilloscope is turned. The
relationship between probe range and V/div setting matches that shown in
Table 2: Ranges and 4/5/6 Series MSO Volts/div
settings on page 32.
Selecting a sensor tip cable
CAUTION: Avoid over-voltage conditions that can damage or degrade the sensor head input termination by
selecting the correct sensor tip cable. Selecting the correct sensor tip 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 lowest attenuation possible for the signal being measured.
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 cable. Start at the top of the table and work down. Choose the
first tip that meets all of your criteria.
Table 3: Sensor tip cable selection
Sensor tip cable
Most sensitive V/div
setting
Dynamic range
Maximum non-
destruct voltage (DC
+ pk AC)
1
Differential input
resistance
TIVPWS500X 500 mV ±2500 V 2500 Vpk 40 MΩ
TIVPSQ100X 100 mV ±500 V 600 Vpk 10 MΩ
TIVPMX50X 50 mV ±250 V 250 Vpk 10 MΩ
TIVPMX10X 10 mV ±50 V 250 Vpk 10 MΩ
TIVPMX1X 1 mV ±5 V 100 Vpk / 5 V
RMS
1 MΩ / 50 Ω
SMA Input 1 MΩ 1 mV ±5 V 100 Vpk 1 MΩ
SMA Input 50 Ω 1 mV ±5 V 5 V
RMS
50 Ω
Deskew
Each probe comes loaded with nominal propagation delay values that can be automatically applied through the Vertical
menu on the oscilloscope. Deskew accuracy can be improved using a known signal and a deskew fixture. When the timing
relationships between waveforms is critical, always deskew your test system with known equipment.
Input offset
The measurement system provides an adjustable input referred offset voltage. This enables viewing a portion of the signal
that is off-screen or examining sensitive behavior riding on a larger differential voltage. For example, a 0 V to 600 V step
would normally exceed a ±500 V input range. By applying 300 V of offset, the 600 V step is brought into the dynamic range
of the probe and can be viewed accurately. Offset is applied by the probe and has a much greater range than the
oscilloscope alone.
1
Maximum differential input voltage vs frequency derating graphs
on page 37
Getting started
TIVP Series IsoVuTM Measurement System User Manual 33