How do I upgrade my N9935A/36A/37A/38A/60A/61A/62A FieldFox Handheld Microwave Spectrum Analyzer?
30-Day Free Trial Options License for FieldFox Handheld Analyzers 
- Redeem FREE 30-day trial option license for your existing FieldFox handheld analyzer
- Evaluate the full-featured version of FieldFox capability with no functionality restrictions
- Trial period begins when the license is issued through the Keysight Software Licensing website and is non-renewable
- One 30-day trial license for each option/capability per instrument
- Certain option may require prerequisite option(s) to function, please check additional requirements for more information
- Be sure your instrument is current with the latest firmware release to take advantage of the latest functions and capabilities.
If you are ready to redeem a free 30-day trial license, please select the option trial and complete the short redemption form. You will be prompted for serial number for the specific instrument you will be using.
Option License Upgrades for FieldFox Handheld Analyzers 
- Most of the N9935A, N9936A, N9937A, N9938A, N9960A, N9961A, N9962A FieldFox Handheld Microwave Analyzer options are available for post-sale retrofit.
- The table below provides an Installation Note for each upgrade. The installation note includes a list of the performance verification tests and adjustments required as well as the test equipment and test software necessary to complete the upgrade. In most cases the instrument will need to be sent to and Keysight Service Center.
- Hardware upgrades may require that a minimum firmware is already installed. Up-to-date firmware can be downloaded for free from FieldFox - Firmware.
- Upgrades may also require the redemption and installation of a license key before they will be activated. Once a redemption certificate is received, the license key(s) can be redeemed at the Software License Redemption Website.
- Required adjustments for all options are performed for new instruments before shipment from the factory. Upgrades installed during the first 12 months of use do not require testing or adjustment. When an option is added to an instrument after it has been in service for more than 12 months, annual calibration is recommended for some options to insure specified performance.
| Description | Option | Model Number | Option Trial | Order option upgrade as | Installation Note | Upgrade Contents | Minimum Firmware | Adjustments Required | Additional Requirements | Incompatible With | Installed By - Estimated Time |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CAT/Network Analysis | |||||||||||
| Reflection meas. (RL,VSWR and scalar meas.) | 320 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-320 Trial | N993x/6xAU-320 | Software, License key | ≥A.06.00 | None | Required option: 220 - N9938A specifically requires option 100 - Option 100 is only available on N9938A at time of purchase. It is not available as a trial/upgrade | None | Customer - 0.5 Hrs | |
| Spectrum Analyzer | |||||||||||
| Extended Range Transmission Analysis (ERTA) | 209 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-209 Trial N9936A-209 Trial N9937A-209 Trial N9938A-209 Trial N9960A-209 Trial N9961A-209 Trial N9962A-209 Trial | N993x/6xAU-209 | Software, License key | ≥A.08.00 | None | Required option: 220 Optional options: 235 & 307 *Option 235: The optional pre-amplifier is only necessary on the FieldFox being used as the receiver. * Option 307: GPS is only necessary for optimizing measurement dynamic range for high loss devices and is not necessary for basic operation. Requires 2 FieldFoxes | None | Customer - 0.5 Hrs | |
| Tracking generator | 220 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-220 Trial N9936A-220 Trial N9937A-220 Trial N9938A-220 Trial N9960A-220 Trial N9961A-220 Trial N9962A-220 Trial | N993x/6xAU-220 | Software, License key | ≥A.06.00 | None | None | None | Customer - 0.5 Hrs | |
| Pre-amplifier | 235 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-235 Trial N9936A-235 Trial N9937A-235 Trial N9938A-235 Trial N9960A-235 Trial N9961A-235 Trial N9962A-235 Trial | N993x/6xAU-235 | Software, License key | ≥A.06.00 | None | None | None | Customer - 0.5 Hrs | |
| Interference analyzer and spectrogram | 236 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-236 Trial N9936A-236 Trial N9937A-236 Trial N9938A-236 Trial N9960A-236 Trial N9961A-236 Trial N9962A-236 Trial | N993x/6xAU-236 | Software, License key | ≥A.06.00 | None | None | None | Customer - 0.5 Hrs | |
| Spectrum analyzer time gating | 238 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-238 Trial N9936A-238 Trial N9937A-238 Trial N9938A-238 Trial N9960A-238 Trial N9961A-238 Trial N9962A-238 Trial | N993x/6xAU-238 | Software, License key | ≥A.07.00 | None | None | None | Customer - 0.5 Hrs | |
| Channel Scanner | 312 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-312 Trial N9936A-312 Trial N9937A-312 Trial N9938A-312 Trial N9960A-312 Trial N9961A-312 Trial N9962A-312 Trial | N993x/6xAU-312 | Software, License key | ≥A.08.15 | None | None | None | Customer - 0.5 Hrs | |
| Real-time spectrum analyzer | 350 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-350 Trial N9936A-350 Trial N9937A-350 Trial N9938A-350 Trial N9960A-350 Trial N9961A-350 Trial N9962A-350 Trial | N993x/6xAU-350 | Software, License key | ≥A.09.53 | None | None | Old CPU, must have new CPU2 | Customer - 0.5 Hrs | |
| I/Q Analyzer | 351 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-351 Trial N9936A-351 Trial N9937A-351 Trial N9938A-351 Trial N9960A-351 Trial N9961A-351 Trial N9962A-351 Trial | N993x/6xAU-351 | Software, License key | ≥A.10.15 | None | None | Old CPU, must have new CPU2 | Customer - 0.5 Hrs | |
| Indoor and outdoor mapping | 352 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-352 Trial N9936A-352 Trial N9937A-352 Trial N9938A-352 Trial N9960A-352 Trial N9961A-352 Trial N9962A-352 Trial | N993x/6xAU-352 | Software, License key | ≥A.11.50 | None | Required options: 307, and at least one of 312, 360, 370, 377 or 378. | Old CPU, must have new CPU2 | Customer - 0.5 Hrs | |
| IQ Streaming | 353 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-353 Trial N9936A-353 Trial N9937A-353 Trial N9938A-353 Trial N9960A-353 Trial N9961A-353 Trial N9962A-353 Trial | N993x/6xAU-353 | Software, License key | ≥A.12.31 | None | Required option: 351 | Old CPU, must have new CPU2 | Customer - 0.5 Hrs | |
| Analog Demodulation | 355 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-355 Trial N9936A-355 Trial N9937A-355 Trial N9938A-355 Trial N9960A-355 Trial N9961A-355 Trial N9962A-355 Trial | N993x/6xAU-355 | Software, License key | ≥A.08.15 | None | None | None | Customer - 0.5 Hrs | |
| Noise Figure (NF) | 356 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-356 Trial N9936A-356 Trial N9937A-356 Trial N9938A-356 Trial N9960A-356 Trial N9961A-356 Trial N9962A-356 Trial | N993x/6xAU-356 | Software, License key | ≥A.10.30 | None | Required option: 235 and 309 | Old CPU, must have new CPU2 | Customer - 0.5 Hrs | |
| EMF measurements | 358 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-358 Trial N9936A-358 Trial N9937A-358 Trial N9938A-358 Trial N9960A-358 Trial N9961A-358 Trial N9962A-358 Trial | N993x/6xAU-358 | Software, License key | ≥A.11.50 | None | Required options: None Optional options: 235 *Also requires triaxial antenna | Old CPU, must have new CPU2 | Customer - 0.5 Hrs | |
| EMI measurements | 361 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-361 Trial N9936A-361 Trial N9937A-361 Trial N9938A-361 Trial N9960A-361 Trial N9961A-361 Trial N9962A-361 Trial | N993x/6xAU-361 | Software, License key | ≥A.12.41 | None | None | None | Customer - 0.5 Hrs | |
| Over-the-Air (OTA) LTE FDD | 370 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-370 Trial | N993x/6xAU-370 | Software, License key | ≥A.11.00 | None | Option 233, 307. Recommend 235 | |||
| Over-the-Air (OTA) LTE TDD | 371 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-371 Trial N9936A-371 Trial N9937A-371 Trial N9938A-371 Trial N9960A-371 Trial N9961A-371 Trial N9962A-371 Trial | N993x/6xAU-371 | Software, License key | ≥A.12.15 | None | Option 307. Recommend 235 | |||
| Over-the-Air (OTA) 5GTF | 377 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-377 Trial N9936A-377 Trial N9937A-377 Trial N9938A-377 Trial N9960A-377 Trial N9961A-377 Trial N9962A-377 Trial | N993x/6xAU-377 | Software, License key | ≥A.11.00 | None | Option 233, 307. Recommend 235 | |||
| Power Measurements | |||||||||||
| USB power sensor meas, versus frequency | 208 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-208 Trial N9936A-208 Trial N9937A-208 Trial N9938A-208 Trial N9960A-208 Trial N9961A-208 Trial N9962A-208 Trial | N993x/6xAU-208 | Software, License key | ≥A.07.50 | None | Required option: 302 | None | Customer - 0.5 Hrs | |
| USB power sensor support | 302 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-302 Trial N9936A-302 Trial N9937A-302 Trial N9938A-302 Trial N9960A-302 Trial N9961A-302 Trial N9962A-302 Trial | N993x/6xAU-302 | Software, License key | ≥A.06.00 | None | Use with power sensor. List of compatible sensors available from www.keysight.com/find/usbsensorsforfieldfox | None | Customer - 0.5 Hrs | |
| Built-in power meter | 310 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-310 Trial N9936A-310 Trial N9937A-310 Trial N9938A-310 Trial N9960A-310 Trial N9961A-310 Trial N9962A-310 Trial | N993x/6xAU-310 | Software, License key | ≥A.06.00 | None | None | None | Customer - 0.5 Hrs | |
| Enable pulse measurement capability | 330 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-330 Trial N9936A-330 Trial N9937A-330 Trial N9938A-330 Trial N9960A-330 Trial N9961A-330 Trial N9962A-330 Trial | N993x/6xAU-330 | Software, License key | ≥A.07.26 | None | Use with peak power sensor. List of compatible sensors available from www.keysight.com/find/usbsensorsforfieldfox | None | Customer - 0.5 Hrs | |
| System Features | |||||||||||
| Remote control capability | 030 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-030 Trial N9936A-030 Trial N9937A-030 Trial N9938A-030 Trial N9960A-030 Trial N9961A-030 Trial N9962A-030 Trial | N993x/6xAU-030 | Software, License key | ≥A.07.00 | None | Requires an iOS device | None | Customer - 0.5 Hrs | |
| GPS receiver function | 307 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-307 Trial N9936A-307 Trial N9937A-307 Trial N9938A-307 Trial N9960A-307 Trial N9961A-307 Trial N9962A-307 Trial | N993x/6xAU-307 | Software, License key | ≥A.06.00 | None | Use with external GPS antenna. Recommended GPS antenna such as N9910X-825 | None | Customer - 0.5 Hrs | |
| DC bias variable-voltage source | 309 | N9935A N9936A N9937A N9938A N9960A N9961A N9962A | N9935A-309 Trial N9936A-309 Trial N9937A-309 Trial N9938A-309 Trial N9960A-309 Trial N9961A-309 Trial N9962A-309 Trial | N993x/6xAU-309 | Software, License key | ≥A.06.00 | None | None | None | Customer - 0.5 Hrs | |
For more information about Keysight Fieldfox series, please visit FieldFox Handheld RF and Microwave Analyzers.