Chapter 5 Remote Interface Reference

Simplified Programming Overview

l

y

eyy

With the MEASure? and CONFigure commands, you can select the measurement function, range, and resolution all in one command.

Use the z parameter to specify a fixed range larger than the

expected value of the input signal. You can also set the z parameter to AUTO to select autoranging.

For frequency and period measurements, the instrument uses one

“range” for all inputs between 3 Hz and 300 kHz. The z parameter is required only to specify the resolution. Therefore, it is not necessary to send a new command for each new frequency to be measured.

Use the

parameter to specify the desired resolution for

 

the measurement. Setting the resolution also sets the integration time

 

for the measurement. The following table shows the relationship

 

between integration time, measurement resolution, number of digits,

 

and number of bits.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Integration Time

Resolution

Digits

Bits

 

 

 

 

 

 

 

 

0.02 PLC

< 0.0001 x Range

412 Digits

15

 

5

0.2 PLC

< 0.00001 x Range

512 Digits

18

 

1 PLC

< 0.000003 x Range

512 Digits

20

 

 

 

 

2 PLC

< 0.0000022 x Range

612 Digits

21

 

 

10 PLC

< 0.000001 x Range

612

Digits

24

 

 

20 PLC

< 0.0000008 x Range

612

Digits

25

 

 

100 PLC

< 0.0000003 x Range

612

Digits

26

 

 

200 PLC

< 0.00000022 x Range

612

Digits

26

 

 

 

 

 

 

 

 

 

Specify the resolution in the same units as the measurement function,

y”. For example, for dc voltage measurements, specify the desired resolution in volts. For resistance, specify the desired resolution in ohms. For frequency, specify the desired resolution in hertz.

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HP 34970A manual Range 41⁄2 Digits