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Fluke 123/124
Users Manual
38
The reading now shows the risetime from 10%-90% of the
trace amplitude and the voltage at the cursors in relation to
the zero icon (-). See Figure 1-21.
i
Turn off the cursors.
Using the 10:1 Probe for High Frequency
Measurements.
Fluke 124 is supplied with a model VP40 10:1 Probe. Use
of this Probe is recommended when you measure high
frequency signals in circuits with a high impedance. The
loading of the circuit by a 10:1 Probe is much lower than
that of a 1:1 Shielded Test Lead.
Probe Attenuation and Probe Adjustment must be
observed when using a 10:1 Probe.
Probe Attenuation.
The Probe attenuates the signal 10 times. Proceed as
follows to adapt the Test Tool’s voltage readout to this
attenuation. The example below is for a Probe connected
to input B:
c
Open the Scope menu.
d
Open the Probes menu.
e
Select PROBE on B ...
f
Press ENTER
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