Manipulating bytes in a byte array and displaying them as 16 bit signed int in a waveform chart

[altenbach]

Where is the sign bit in the 12 bit representation? How are the 12 bits encoded? Are negative values in two's complement?  Is there any only documention for this instrument on how to communicate with it?

[lking]

Sorry I meant to ask what you meant by place the string into a new VI diagram. Excuse my ignorance. Would you be able to attach a diagram including manipulating the data aswell.

REALLY APPRECIATE THE HELP.

[lking]

Yes it is a two's complement output.

[altenbach]

Did you get the string diagram constant? Now simply open a new blank VI and drag the diagram constant to the new diagram. Save the new VI uder a new name and attach it here.

You still have not answered my question about sign and such.

[lking]

Yes sorry I got the first diagram you sent. I think the two's complement take care of the negative numbers?

[altenbach]

The diagram in post #2 here assumes big endian. You should use unflatten from string instead, where you can set the byte order.

[lking]

Ok thank you. Will I then be able to manipulate each byte as I said earlier.

[altenbach]

I don't know what you want to "manipulate" and why?

[lking]

I need to manipulate them because I need to left shift the first byte 8 places. That first byte has the four MSBs of a twelve bit ADC output so I have to left shift and then join it to the second byte (the other 8 bits of 12 bit ADC output) so I can then convert it to a signed 16 bit integer by left shifting that four places as this is what I want to plot.

[lking]

Sorry when I said manipulate i just meant rearrange the bits.