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Equation 1
Chapter 1: Operating the Probe
Probe Operating Range
The Type-N(f) to APC 3.5(f) adapter can be ordered with the probe as
Option 001 or ordered separately, part number 5081-7722.
• The dynamic range of the system will be 3.2 V (6.4 Vp-p) which, with
probe offset, covers most digital technologies.
Using the probe with oscilloscope power
Probe power and offset control are provided by the oscilloscope. There are
several factors to consider about the oscilloscope and probe combination.
• IThe oscilloscope recognizes the presence and type of probe and adapts
the vertical scale factors to reflect the probe characteristics.
• The offset function is transferred to the probe but this is transparent to the
user. The offset will be limited to a range acceptable to the probe. With
54700 family of oscilloscope plug-ins, the offset range is 50 V. See the
sidebar below.
• Since the 54701A is an active probe, the bandwidth of the oscilloscope and
probe combination is a mathematical combination of their individual
specifications.
System Bandwidth =
where
tr1 is the risetime of the oscilloscope.
tr2 is the risetime of the probe
If you are using a 54700 family oscilloscope, the resultant bandwidth with a
specific mainframe, plug-in, and probe combination is noted on a sticker
on the side panel of the plug-in
The probe has limiting designed to avoid excessive power dissipation. The input
operating range of the probe is 5 V. If the input and offset exceeds +14V relative
to the probe tip, the output of the probe will limit at +1.4 V. As the input plus
offset reaches -14 V, the output will limit at -1.4 V; then, it will fold back to
approximately -0.8V as the input plus offset exceeds -14 V. The output of the
probe will remain at the limit voltage until the input plus offset falls below
approximately -8 Vdc.
14
0.35
---------------------------------------- -
2
2
tr1
tr2
(
)
+
(
)
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