B&K Precision 4052-4055 - Manual - Manual (Page 45)

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Stop Frequency is the frequency to which the sweep ends.
5. To set the frequency span, select FrqSpan from the menu and use the rotary knob or
the numeric keypad to enter the frequency span.
Frequency Span provides added control to the direction of the sweep.
6. To set the start frequency, select StartFreq from the menu and use the rotary knob
or the numeric keypad to enter the start frequency in Hz.
Start Frequency is the frequency to which the sweep begins.
7. To set the center frequency, select MidFreq from the menu and use the rotary knob
or the numeric keypad to enter the center frequency in Hz.
Center Frequency is the frequency at the center of the sweep.
8. Select Source and choose between Internal, External, or Manual.
Internal – Internal trigger source.
External – External trigger source. Users can connect an external signal into
the rear BNC terminal labeled ExtTrig/Gate/FSK/Burst to trigger the sweep.
Manual – Manual trigger source.
9. Press the 1/2 option to go to the second page of the menu.
If Internal source is previously selected, the Trig Out option will be available.
On – A square waveform with 50% duty cycle will output from the ExtTrig
BNC connector at the beginning of the sweep. The frequency corresponds to
the sweep time.
Off – Trigger output be disabled
If External source is previously selected, the Edge option will be available, and the
Trig On option will not be available.
The up arrow means it will trigger off the rising edge of the external
signal.
The down arrow means it will trigger off the falling edge of the external
signal.
If Manual source is previously selected, the Trig option in RED will be available. Each
press of this option using the function key on the front panel will trigger a sweep.
Trig Out option is not available for manual source.