B&K Precision 4040B - Manual - Manual (Page 26)

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(Vp-p)/2 + |offset| <= 5 volts
F4: Symmetry
– When the Square or Triangle
waveforms are selected, the SYMMETRY (duty cycle)
parameter is available. Change the symmetry (Triangle)
or duty cycle (Square) by using the cursor keys, rotary
knob, or numerical keys. If a certain setting cannot be
produced, the waveform generator will display a warning
message.
Square Menu
3.6.2 MODE Key
Selects the output mode: CONT (Continuous), TRIG
(Triggered), GATE (Gated), and BRST (Burst).