Agilent Technologies N1022A Guia do Utilizador descarregar pdf (Página 25)

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

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

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Agilent Technologies N1022A Guia do Utilizador Página 25