B&K Precision 2640 - Manual - Manual (Page 31)

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Description of operating screen
ⓐ Center Marker, Marker 1, When Squelch Marker
CENT Center Frequency
MHz SPAN Span Frequency
STEP Step Frequency
ⓑ When Delta Marker
MKR1 Marker 1 Frequency MHz
LEV1 Marker 2 Level Value
dBm
DIFF
Marker1- Marker2 Level Value
4. Marker
Window