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SELECTING THE PROPER RANGE
+
²
The AP034 Active Differential Probe has a fixed gain of X1
(unity). Use of the ÷10 or ÷20 external attenuators reduces the
amplitude of the input signal when it is necessary to extend the
dynamic operating range of the probe. Attenuating the input
signal increases both the differential mode range and common
mode range of the probe.
Refer to the block diagram below.
Probe
X1
1
-
X1
1
By using the plug-on attenuator, you can extend the attenuation
range to ÷20. Do not use the ÷10 and ÷20 plug-on attenuators
simultaneously. The maximum ranges are given in the following
table:
Table 1. AP034 Dynamic ranges and input capacitance at different attenuator
Common Mode Range
Differential Mode Range *
*Offset moves the center point of this range.
ISSUED: January 2000
$3 $FWLYH 3UREH
Σ
+
V
Offs
Σ
Figure 2. AP034 Block Diagram
settings
÷1
Attenuation
Attenuation
(Probe Only)
±16 V
±400 mV
Control
+
X1
-
50
÷10
÷20
Attenuation
±42 V
±42 V
±4 V
±8 V
AP034-OM-E Rev D
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