28                                       Keysight N9938-90003 User’s Guide
Preparing for Initial Use of Your New FieldFox
Take the FieldFox Tour
No. Caption Description Learn 
More:
1 Power ON: press momentarily. 
STAND BY: with FieldFox power ON, press briefly.
OFF: press and hold until the FieldFox shuts off (about 4 seconds).
“FieldFox 
ON/OFF 
Settings” 
on 
page 21
2 LED Not lit: FieldFox OFF, not charging
Green: FieldFox ON. Charging status indicated by battery icon on screen
Orange, flashing: FieldFox STAND BY 
Orange, intensity increasing, flashing slowly: FieldFox OFF, charging
“Power 
Button 
LED 
Status” 
on 
page 22
3
System
Displays a sub-menu for system setup “System 
Settings” 
on 
page 215
4 Function keys
Includes: Freq/Dist, Scale/Amptd, BW, Sweep, Trace, Meas 
Setup, Measure, and Mode.
Refer to 
specific 
Mode.
5
Preset
Returns the analyzer to a known state “How to 
Preset the 
FieldFox” 
on 
page 217
6
Enter
Confirms a parameter selection or configuration --
7
Marker
Activates marker function “All about 
Markers” 
on 
page 190
8
Mkr-->Tools
Displays a sub-menu for marker functions “All about 
Markers” 
on 
page 190
9
Esc
Exits and closes the Active Entry dialog box or clears the character input --
10
Save/Recall
Saves the current trace or recalls saved data from memory “Saving 
and 
Recalling 
Files” on 
page 266