If you ever need to create some random noise with using the FMx engine using a single operator/carrier here is how I did it.

Choose an algorithm: 1
Choose an operator carrier: 2 (no feedback needed)

Part 1/Operator 2

FORM/FREQ:
Spectral: All 2
Skirt: 7
Freq Mode: Fixed
Course: 21 (or to your liking)

LEVEL> Level: 80+
MOD CONTROL>2nd LFO
LFO Wave: S&H

Edit Part (n) COMMON: 2nd LFO
Extended LFO: On
Speed: 415 (to you liking)
Destination
Pitch Modulation Depth: 99
Operator Depth Ratio: 7 (for the operator selected)

LFO2 saved the day with the S & H wave shape
have fun!