B&K Precision 2658A - Manual - Manual (Page 16)

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14) Marker & Peak search key
This key is used for setting marker or peak search.
15) Save/Load key
Used for saving or loading a spectrum or settings parameters.
16) Copy key
This key allows the screen image to be printed on USB printer (option) or stored in USB memory.
17) UTIL key
Used for setting label entry, clock, and buzzer.
18) Display control key
Used for setting color, backlight ON/OFF or brightness of backlight.
19) Rotary encoder
This is used for adjusting settings and parameters.
20) Power switch
This is for power ON or OFF.
21) Input connector
N(J) connector
22) Indicator for charging condition
Two color LED indicates the charging conditions of battery.
23) Input connector for DC power source
Connect AC adaptor MA400.
24) USB A plug
For connecting USB printer (option) or USB memory.
25) USB B plug
For interfacing with a PC