Keysight E6961A - Page 72

D Using the E6960-66600 Frequency Divider Board
74 Keysight E6961A User Guide and Method of Implementation
Switch B
Switch B sets the frequency divider to the relevant setting.
Note: Other combinations are not valid. if no valid switch setting is detected, LED
will flash indicating invalid switch B configuration. After reset, if no valid position
is detected, the board uses the “Free Run Mode” which generates an accurate 10
MHz signal.
A8
off NA NA
on NA NA
Table D-1 Switch Operating Modes
Switches Position Operating mode Comment
Table D-2 Switch B Operating Modes
Divider Comment
B1 B2 B3 B4 B5 B6 B7 B8 To obtain 10 MHz output:
off off off off off off off off Not valid (def) Free Run Mode
on off off off off off off off Div 1 Targeted 10MHz input clock
off
on off off off off off off Div 5/2 Targeted 25MHz input clock
off off
on off off off off off Div 20/3 Targeted 66.67MHz input clock
off off off
on off off off off Div 25/2 Targeted 125MHz input clock
off off off off
on off off off Div 75 Targeted 750MHz input clock