| B18 | Removable Hard Disk (Flash Card) operating system WinXP (Factory installation only) |
| B19 | 2nd hard disk (Flash Card) for ESU-B18 incl. ESU firmware Operating system WinXP |
| B24 | Internal preamplifier 100kHz to 26.5GHz; gain 30dB nominal (For EMI Test Receiver R&S® ESU26; |
| C3 | Three years of 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 | ESU26 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 |
| ESU40-DKD | ESU40 DKD (ISO17025) calibration incl. ISO 9000 calibration (order only with device) |
| ESU8-DKD | ESU8 DKD (ISO17025) calibration incl. ISO 9000 calibration (order only with device) |
| FS-K7 | FM demodulator, allows measurement of FM specific parameters (for FMU, FSP, FSU) |
| FSP-B10 | External generator control for FSP, FSU, FSG, FSQ, ESU, ESCI, ESPI and for retrofit of |
| FSU-B12 | Output attenuator for tracking generator for FSU, FSQ |
| FSU-B4 | OCXO 10 MHz aging/year: 0.35*10E-7 for FSU, FSQ, FSMR |
| FSU-B9 | Tracking generator for FSU and FSQ, 100 kHz - 3.6 GHz |
| K53 | Time Domain Scan FFT based scan for very fast overview measurements |
| 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. |