The N9925A FieldFox Handheld Microwave Vector Network Analyzer, 9 GHz is equipped to handle routine maintenance, in-depth troubleshooting and anything in between. FieldFox delivers Keysight-quality measurements – wherever you need to go. Add FieldFox to your kit, and carry precision with you. The VNA’s base function is a transmission/reflection analyzer (S11, S21), and it can be configured to include full 2-port S-parameters. FieldFox can be ordered with additional capabilities: cable and antenna analyzer, built-in power meter, vector voltmeter, variable DC source, built-in GPS receiver, and remote control using an iPad or iPhone.