| B1 | Ruggedized Housing (corner guards and front panel cover) for R&S®ESR |
| B10 | External Generator Control |
| B18 | Solid State Drive (SSD, removable) |
| B19 | Spare Hard Disk Drive (HDD, removable) |
| B22 | Preamplifier, 9 kHz to 4 GHz/7 GHz |
| B29 | Frequency Extension 10 Hz and MIL bandwidths |
| B3 | Audio Demodulator. |
| B30 | DC Power Supply for 12 V supply voltage |
| B32 | Lithium-Ion Battery Pack |
| B34 | Charger for R&S®FSV-B32 lithium-ion battery pack |
| B4 | OCXO, Precision Reference Frequency Stability |
| B5 | Added Interfaces: Trig out, USB, Aux Port, IF/VIDEO/DEMOD Output. |
| B50 | Hardware for Time Domain and Real-Time Analysis |
| B9 | Tracking Generator 100 kHz to 4 GHz/7 GHz |
| K53 | Time Domain Scan |
| K55 | Realtime Analysis (requires R&S®ESR-B50) |
| K56 | IF Analysis |