Agilent Technologies B1500A Podręcznik Użytkownika Pobierz pdf (Strona 432)

100

101

7- 50 Agilent B1500 User’s Guide, Edition 7

Function Details

SMU Ranging Mode

Auto Ranging

Range changing is performed as below.

For measurement

channels

The me

asurement channel automatically searches for and measures at the range that

provides the best resolution as follows:

• For current measurement, the measurement channel uses the presen

t range if the

following formula is satisfied; otherwise, the channel changes the range.

Range × 0.1 ≤ Measurement

value ≤ Range × X/100

where X=115, or 100 at the maximum range.

See also “Enhanced Auto Ranging for Current Measurement” on page 7-52.

• For voltage measurement, the measurement

channel us

es the present range if the

following formula is satisfied; otherwise, the channel changes the range.

Next lower range value ≤ Measurement value ≤ Range × X/100

where X=110, or

100 at the maximum range.

For output

channels

The ou

tput channel automatically searches for and forces at the lowest range that

covers the output value as follows:

• For staircase sweep output, the output channel uses the lowest range that covers

the start and st

op values. However, it uses the lowest range that covers the step

output value for the logarithmic current sweep. For the voltage sweep that sets

the power compliance, the channel uses the lowest range (20 V range or more)

that covers the step output value.

• For pulsed bias output, the output channel uses the lowes

t range that covers the

base and peak values.

• For pulsed sweep output, the output channel uses the lowes

t range that covers

the base, start, and stop values.

• For quasi-pulsed output and search source output, the output channel uses the

lowest range that covers

the start and stop values.

The maximum output value is as follows:

• Maximum current output value = Range × X/100

where X=11

5, or 100 at the maximum range.

• Maximum voltage output value = Range value

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