scaling recived data

[maple72]

Hi all

I have managed to  capture the waveform graph from  an HP8569B spectrum analyzer using LabVIEW  , I recive values of data for the waveform graph  that are not scaled or say , that do not match the values set up actually by the real spectrum analyzer , the real HP8569B spectrum analyzer   uses a scaling system that gives the refrence value  ( zero level ) as the upper part of the screen of the waveform graph , each div below the upper part is 10 dB/ div

any help how to relate the data I have obtained with the scaling system of the spectrum analyzer

thnaks alot

[maple72]

help me plz all

thnaks alot

[f.grasdepot@laposte.net]

Hi,

a link to the remote programming manual of this spectrum analyser seems
required.
Looking at the ascii commands and extracting the Y scale and Y origin
will be necessary.
A direct dialog with the instrument helps most of the time ( for
instance see at www.labtab.com/ni_gpib0 )

Regards,

FG

[Albert.Geven]

I you recalculate the real values you can display them, dB is a logaritmic scale,
The x-axis can be anything but if you give me the start, finish and step value I can look in my lib for something relevant.