B&K Precision 4045B - Manual - Manual (Page 33)

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F1: Recall – Recalls a previously stored front-panel
setup from the selected buffer. Change the buffer
number by using the rotary input knob. Valid storage
buffer numbers are from 1 to 19
Buffer 0 is the factory default setup.
F2: Store – Stores the current front-panel setup to
the specified storage buffer. Change the buffer
number by using the data keys or the rotary input
knob. Valid storage buffer numbers range from 1 to
19.
F3: Out-On Def – Selects the OUTPUT state on
power-up. Select ON to enable or OFF to disable the
output on power-up.
F4: COUNTER – Enables the built-in frequency
counter. The frequency of the signal connected to the
TRIG IN connector will be displayed. The counter is
auto ranging with up to 8 digits of resolution.