Harman Kardon Citation Fifteen Instruction Manual page 10

EXT. DOLBY NR SWITCH
STEREO NOISE FILTER SWITCH
MUTE SWITCH
MUTING THRESHOLD CONTROL
LEVEL SET TONE SWITCH
DIAL SCALE
The DIAL SCALE consists of a large drum which rotates in con-
junction with the knurled flywheel. The DIAL
SCALE is calibrated
with an FM frequency scale (88-108 mHz) and a logging scale {0-10}.