Rohde & Schwarz Spectrum Analyzer Preamplifier, 5 kHz to 44 GHz for R&S®FPH var .44 and R&S®FPH var .54 (software license)
The R&S®FPL1-K54 is a software license preamplifier option for the R&S®FPH handheld spectrum analyzer, specifically for the .44 and .54 GHz variants. This preamplifier extends the analyzer's sensitivity by providing a low-noise amplification path from 5 kHz up to 44 GHz, enabling the detection of weak signals across a wide frequency range. The preamplifier is activated via a software license (part number 1334.6600.02) and is designed to improve measurement accuracy in challenging RF environments. It is ideal for applications requiring high dynamic range and low-level signal analysis, such as EMI diagnostics, wireless communications, and spectrum monitoring. The option is fully integrated into the R&S®FPH user interface and does not require additional hardware installation.