Agilent Technologies B1500A User's Guide download pdf (Page 74)

2-58 Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3

Driver Functions

agb1500_setSample

interval Interval of the sampling. Numeric expression. in seconds.

0.002 (initial setting) to 65.535 s, 0.001 s resolution.

interval < 0.002 s in 0.00001 s resolution is also available for

the linear sampling. It must satisfy the following formula. See

NOTE below.

interval ≥ 0.0001 + 0.00002 × (Num_ch -1)

Num_ch: number of measurement channels

point Number of samples. Integer expression. 1 to the following

value.

For linear: 100001 / (number of measurement channels)

For log: 1 + (number of data for 11 decades)

NOTE If you set interval < 0.002 s

Sampling mode must be linear. This setting is not permitted for the log sampling.

All measurement channels must use the high speed A/D converter (ADC). This

setting is not permitted if a measurement channel uses the high resolution ADC.

If the multiple measurement channels are used, all channels perform measurements

in parallel.

If the measurement ranging mode is not the fixed mode, the measurement channels

automatically select the minimum range that covers compliance value set to the

channel.

If the measurement time is expected to be longer than interval, the measurement

channels automatically adjust the number of averaging samples (agb1500_setAdc

settings) to keep the sampling interval.

Sampling

Operation

Sampling measurement will be started by the agb1500_sampleIv function, and

performed as shown below. Before the measurement trigger, the agb1500_force

output channels will start the output at the timing of the function execution.

1. By the measurement trigger, the agb1500_addSampleSyncIv output channels

start the base value output. Each channel controls the output simultaneously.

2. base_hold seconds later, the source channels change the output to the bias value.

The channels keep the value until the end of the sampling measurement.

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Agilent Technologies B1500A User's Guide Page 74