Question on 737 ACMS alpha code

[B738HT]

Hi everyone,
Would anyone please tell me what this code means:PTRR DFDAU-1 1:3.076 ?

[STBYRUD]

...that the pitch trim as recorded by the DFDAU is 1.3076?

[B738HT]

Thanks for your reply. I just found a decode table for the ACMS.

PTRR meas PITCH TRIM POSITION-RAW(SYNCHRO)

Here is a new question: what does the RAW means? What is the difference between PTRM and PTRR?

[STBYRUD]

I have it listed as Pitch Trim Position - Raw (Synchro Angle), I suspect that the PTRM value from the ACMS is corrected to reflect the actual stabilizer deflection, while the PTRR is the direct (digitized) output from the resolver.

[B738HT]

Making sense. Thanks a lot.