FFT INTERVAL AND SPECTRUM HANDOFF RECORD
Original STEP Diagnostics documentation aid. No vehicle pass/fail limits or universal acquisition settings.

COMPLAINT AND SOURCE
Date/time and job:
Complaint and comparison question:
Original filename and total saved time range:
Tool/software/version:
Sensor model, axis, location and attachment:
Applicable setup instruction:

ANALYSIS INTERVAL
Selected start/end:
FFT block duration T:
Sample rate fs, if exposed:
Acquired points N per FFT block, if exposed:
Uniform sampling established?:
Unpadded bin spacing fs/N = 1/T, when applicable:
Segmentation/overlap and number of averaged blocks, if exposed:
Padded FFT length and displayed grid:
Unavailable fields and limits:

PROCESSING
Window:
Averaging:
Filters:
Amplitude definition/unit:
Frequency unit:
Display zoom/limits:

CONTEXT AND HANDOFF
Engine-speed and road-speed history:
Event behavior within the interval:
Saved spectrum filename:
Comparator interval and processing:
Differences requiring reconciliation:
Unresolved interpretation:
Next verification step: