User`s guide

Agilent EasyEXPERT User’s Guide Vol. 1, Edition 1 4- 65

Function Details

SMU Measurement Time

Measurement time depends on integration time, measurement range, and other

measurement conditions, and can be expressed by the following formula:

Measurement time = Integration time + Overhead time

Integration time is the time required for measurement, and does not include such

factors as range changing or data compensation, which would be the overhead time.

Integration Time

Integration time is the time required to get measurement data. For accurate and

reliable measurement, integration time should be increased. Integration time can be

set for each type of A/D converter (ADC) used by the measurement channel.

• High-speed ADC

Installed in each measurement module. For high speed measurement. Sets the

number of averaging samples for getting one measurement data by setting the

Mode and the Factor value. Only PLC and TIME are available for SMU pulse.

AUTO Number of averaging samples = Factor  reference

Factor = 1 to 1023

where reference is the number of averaging samples

automatically set by the B1500; this cannot be changed.

MANUAL Specify the number of averaging samples (Factor).

Factor = 1 to 1023

PLC Number of averaging samples = Factor  128

Factor = 1 to 100

The B1500 gets 128 samples in a power line cycle. Hence, the

Factor value is equal to the number of power line cycles.

TIME Specify the actual measurement time (Factor).

Factor = 2 s to 20 ms, 2 s step

For HR/MP/HPSMU, it performs the operation of MANUAL.

Then the number of averaging samples is automatically set to

the following value.