Kenwood FG-273 Instruction Manual page 10

10
ct) DUTY/PULL INV (Symmetry Adjustment/Polarity Selector) Knob
Controls symmetry of output signal.
Clockwise rotation varies the duty ratio from 1:1 to 40:1.
Pulling this knob inverts the phase polarity.
Note : Note that controlling this knob changes frequency.
TTL Wave —