| C3 | Three years of standard calibration coverage based on the R&S recommended calibration interval - includes test data. ( ) |
| C5 | Five years of standard calibration coverage based on the R&S recommended calibration interval - includes test data. ( ) |
| DCV-ZP | Printout of DCV (additional, in combination with DCV-Option only) |
| FSL-B10 | GPIB interface |
| FSL-B22 | RF preamplifier, gain 20 dB (software license) |
| FSL-B30 | DC power supply 12 - 28 V |
| FSL-B31 | NiMH battery pack |
| FSL-B4 | OCXO reference frequency |
| FSL-B5 | Additional interfaces video/IF-output, power meter 28 V - DC for noise source |
| FSL-B8 | Gated sweep function (for R&S®FSL and R&S®ZVL w. R&S®ZVL-K1) (software license) |
| FSL-K30 | Application firmware for noise figure and gain measurements (for R&S®FSL and R&S®ZVL w. R&S®ZVL-K1) |
| FSL-K7 | Analogue demodulation AM/FM/PM (for R&S®FSL and R&S®ZVL w. R&S®ZVL-K1) (software license) |
| FSL-K9 | Power sensor measurements with NRP (software license) |
| R3 | Three years of depot repair coverage, including standard recalibration and test data if necessary to complete the repair. |
| R5 | Five years of depot repair coverage, including standard recalibration and test data if necessary to complete the repair. |