Agilent Technologies N1022A Guía de usuario Pagina 25

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General Information 1
Dynamic Range
N2820/1A User’s Guide 25
about 50 µA and the zoomed- out channel can display about
2.2A for a dynamic range of approximately 93 dB:
The value of the R
SENSE
resistor can range from 1 mW to
1MW as shown in Figure 29, “Maximum Current Range,” on
page 54. Using these two R
SENSE
values in different
measurements, the dynamic range could be increased to
100 dB.
Effects Other Than Dynamic
Range
Selecting the proper R
SENSE
resistance is often a compromise
between a value that is large enough to obtain accurate
measurements while small enough to avoid negatively
affecting the circuit under test. Increasing the resistance
decreases the noise,
increases sensitivity, and
increases the burden voltage across the R
SENSE
resistor
(I
2
R).
Decreasing the resistance will have the opposite effect.
Channel Position on the
Screen
This probe does not have voltage offset. Use the
oscilloscope’s position controls to adjust the location of the
waveform on the screen. Vertical scaling occurs about zero
amperes.
93dB 20
2.2A
50 μA
--------------
log=
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