Agilent Technologies 53230A Guia do Utilizador descarregar pdf (Página 198)

198 53220A/53230A User’s Guide

6 53220A/53230A Math, Graphing, and Data Logging

Scaling function results must be in the range of -1.0E+24 to -1.0E-24,

0.0, or +1.0E-24 to 1.0E+24. Results outside these limits will be

replaced with -9.9E+37 (negative infinity), 0, or +9.9E+37 (positive infin-

ity).

Following a reset (*RST) or instrument preset (SYSTem:PRESet), the scaling

function is set to NULL.

Scale Reference Value

The NULL, PCT, PPM, and PPB scaling functions require a reference value. For

PCT, PPM, and PPB the value cannot be ‘0’.The reference can be obtained auto-

matically or specified directly with the commands:

CALCulate[1]:SCALe:REFerence:AUTO {OFF|ON}

CALCulate[1]:SCALe:REFerence:AUTO? (query form)

CALCulate[1]:SCALe:REFerence {<reference>|MINimum|MAXimum|

DEFault}

CALCulate[1]:SCALe:REFerence? [{MINimum|MAXimum|DEFault}]

(query form)

- automatically selects the first measurement as the reference for all subse-

quent readings in the reading count (trigger count x sample count). OFF dis-

ables automatic selection and requires the reference to be specified directly.

Following a reset (*RST) or instrument preset (SYSTem:PRESet), automatic

reference selection is enabled (ON).

<reference> - specifies the reference value directly. The reference is used

for all readings in the reading count.

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Agilent Technologies 53230A Guia do Utilizador Página 198