| B2 | Preselector for ESPI, factory installation only. Discontinued and replaced |
| B20 | Extended environment specs for R&S ESPI (random vibration 1.9G RMS; temperature 0 to 55°C) |
| C3 | Three years of depot calibration coverage based on the R&S recommended calibration interval - includes test data. The first calibration is included with product delivery with 2 additional depot calibration(s). |
| C5 | Five years of calibration coverage based on the R&S recommended calibration interval - includes test data. The first calibration is included with product delivery with 4 additional depot calibration(s). |
| DCV-2 | Documentation of calibration values |
| DCV-ZP | Printout of DCV (additional, in combination with DCV-Option only) |
| DKD | ESPI3 DKD (ISO17025) calibration incl. ISO 9000 calibration (order only with device) |
| ESH3-Z2 | Pulse limiter 0 - 30 MHz N-type connector incl. calibration certificate and report |
| ESPI3DKD | ESPI3 DKD (ISO17025) calibration incl. ISO 9000 calibration (order only with device) |
| ESPIK50 | Trigger for coverage measurements with EMI Test Receivers R&S ESPI and R&S ESU |
| FS-K7 | FM demodulator, allows measurement of FM specific parameters (for FMU, FSP, FSU) |
| FSP-B1 | Rugged case with variable carrying handle for all FSP models |
| FSP-B10 | External generator control for retrofit of FSP, FSU, FSQ, ESPI, ESCI |
| FSP-B16 | LAN interface 10/100 base T for FSP 1164.4391.XX and ESPI 1164.6407.XX |
| FSP-B30 | DC power supply 12 - 28 V for FSP spectrum analyzer and ESPI test receiver |
| FSP-B31 | NiMH battery pack + charger for FSP and ESPI requires FSP-B1 and FSP-B30 |
| FSP-B32 | Spare battery pack (NiMH) for FSP spectrum analyzer and ESPI test receiver |
| FSP-B4 | OCXO 10 MHz for FSP |
| FSP-B6 | TV trigger and adjustable RF power trigger (40 dB) for FSP |
| FSP-B9 | Tracking generator for FSP 9 kHz - 3 GHz, I/Q modulator |
| K50 | Trigger for coverage measurements with EMI Test Receivers R&S®ESPI and R&S®ESU |
| R3 | Three years of depot repair coverage, including re-calibration if necessary to complete the repair. First year of repair coverage is provided by the 12-month new product warranty. |
| R5 | Five years of depot repair coverage, including re-calibration if necessary to complete the repair. First year of repair coverage is provided by the 12-month new product warranty. |