Active Differential Voltage Probes - HBM Genesis GEN5i User Manual

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D.2.5

Active differential voltage probes

Active differential probes are battery powered, differential amplifiers in front of
the input amplifier.
Figure D.12: Typical example of an active differential voltage probe
Active differential voltage probes are independent differential amplifiers in front
of the system input amplifier.
The achievable input range and accuracy depends on the active differential
probe used. Active differential probes can be used in front of virtually any
amplifier, but their performance typically is limited. Also, as they usually operate
from batteries, this causes some inconveniency as battery maintenance is
needed.
Active differential voltage probes typically decrease the overall accuracy and
the CMRR of the system.
Table C.9: Active differential voltage probes overview table (Part 1)
Part number
(1)
1-G909-2
(1) Suitable instruments and input amplifiers:
All GEN DAQ Basic cards GN810 & GN811 & GN812 & GN 814
GEN DAQ High speed cards GN412 & GN413
Table C.10: Passive differential voltage probes overview table (Part 2)
Part number
(1)
1-G909-2
Divider factor
20X/200X
switchable
Accuracy Cable length
0.9 m
+/- 2 %
GEN5i
Maximum input voltage
+/- 1.4 kV DC or
+/- 1000 V rms
Bandwidth
25 MHz
I2679-4.0 en