Reference subtraction error in MathChannel ?

[plmohan]

I am trying to subtract a reference channel using the MathChannel operation:
B -B(2) . The result does not appear correct. In attached plot, the bottom Red trace is B, top red trace is B(2). The difference (MathChannel output) is the black trace. There appears to be a scaling error of some sorts. In this example, the 'live' B signal is unchanged from the stored Reference. If instead I set up for MathChannel = B+B(2) the resulting output looks correct and is simply a 2x doubling of input (B).
Tech support feedback welcomed.

[bennog]

can you post a .psdata file

[plmohan]

Yes, .psdata file attached.

[bennog]

It has something to do with the name of the reference channel.
it was somehow interpreted as 2B so the result was B - (2 * B)
Renamed the reference to Bref and the formula to "B-{Bref}"
See the attached psdata file for the result

Then back to the original file and changed the formula to " B- {B (2)}" and it worked like expected.

Benno

[plmohan]

Thanks for digging into this Benno. Working as expected now.
Cheers, Paul