How can I make field strength measurements on my handheld spectrum analyzer?

Each of the HSA products supports field strength measurements.

For the N9340B, you can press [Meas] -> {More 1 of 2} -> {Field strength} to enable the field strength measurement function.

For the N9342C, N9343C or N9344C, the field strength measurement operation is different from the N9340B. Please refer to Amp Correction on pages 76 through 78 of the "Handheld Spectrum Analyzer User’s Guide".