| R&S ZNA26-B26 | Direct IF access |
| R&S ZNA26-B16 | Direct source and receiver access for R&S ZNA26 (2 ports) |
| R&S ZNA26-B16 | Direct source and receiver access for R&S ZNA26 (4 ports) |
| R&S ZNA26-B161 | Direct source monitor access, port 1 for R&S ZNA26 (HW opt.) |
| R&S ZNA26-B163 | Direct source monitor access, port 1+3 for R&S ZNA26 (HW opt.) |
| R&S ZNA43-B16 | Direct source and receiver access for R&S ZNA43 (2 ports) |
| R&S ZNA43-B16 | Direct source and receiver access for R&S ZNA43 (4 ports) |
| R&S ZNA43-B161 | Direct source monitor access, port 1 for R&S®ZNA43 (HW opt.) |
| R&S ZNA43-B163 | Direct source monitor access, port 1+3 for R&S ZNA43 (HW opt.) |
| R&S ZNA50-B16 | Direct source and receiver access for R&S ZNA50 (2 ports) |
| R&S ZNA50-B16 | Direct source and receiver access for R&S ZNA50 (4 ports) |
| R&S ZNA67-B16 | Direct source and receiver access for R&S ZNA67 (2 ports) |
| R&S ZNA67-B16 | Direct source and receiver access for R&S ZNA67 (4 ports) |
| R&S ZNA50-B161 | Direct source monitor access for port 1 before the source step attenuator for R&S ZNA50 |
| R&S ZNA50-B163 | Direct source monitor access for port 1 and port 3 before the source step attenuator for R&S ZNA50 (4 ports) |
| R&S ZNA67-B161 | Direct source monitor access for port 1 before the source step attenuator for R&S ZNA67 |
| R&S ZNA67-B163 | Direct source monitor access for port 1 and port 3 before the source step attenuator for R&S ZNA67 (4 ports) |
| R&S ZNA-K1 | Spectrum analyzer mode for R&S ZNA |
| R&S ZNA-K2 | Time domain analysis (TDR) for R&S ZNA |
| R&S ZNA-K20 | Extended time domain analysis incl. eye diagram, for R&S ZNA |
| R&S ZNA-K4 | Scalar mixer measurements and arbitrary frequency-converting measurements for R&S®ZNA |
| R&S ZNA-K5 | Vector corrected converter measurements for R&S ZNA (without reference mixer and phase reference), requires R&S ZNA-K4 |
| R&S ZNA-K6 | Phase coherent source control for R&S ZNA |
| R&S ZNA-K61 | True differential mode for R&S ZNA |
| R&S ZNA-K7 | Measurements on pulsed signals. Pulse configuration, pulse profile and pulse train measurement, requires R&S ZNA-K17 |
| R&S ZNA-K17 | Increased IF bandwidth up to 30 MHz for R&S ZNA |
| R&S ZNA-K8 | Converter Control Software (for R&S ZNA, R&S ZVA-Zxxx, R&S ZCxxx) |
| R&S ZNA-K9 | Group delay measurements on frequency converters without LO access for R&S ZNA (4 ports strongly recommended), requires R&S ZNAxx-B16 and R&S ZNA-K4 |
| R&S ZNA-K19 | mHz frequency resolution for R&S ZNA |
| R&S ZNA-K30 | Noise figure measurement for R&S ZNA26/43 |
| R&S ZNA-K50 | Realtime measurement uncertainty analysis for R&S ZNA26, R&S ZNA43 |
| R&S ZNA-K50P | Realtime measurement uncertainty analysis for R&S ZNA. Including pre-installed Swiss Metrology Institute METAS Software: "VNA tools" |
| R&S ZNA-K51 | Security write protection of internal harddisc for R&S ZNA |
| R&S ZNA-K210 | EAZY De-embedding (EZD) based on IEEE 370 for R&S ZNA |
| R&S ZNA-K220 | In-Situ De-embedding that covers IEEE 370 for R&S ZNA |
| R&S ZNA-K230 | Smart Fixture De-embedding (SFD) for R&S ZNA |
| R&S ZNA-K231 | Delta-L 4.0 PCB characterization for R&S ZNA |
| R&S ZNA-K980 | HUMS software option - Health and Utilization Monitoring Service for R&S ZNA (software license) |
| R&S ZNA-K28 | Continuous data recording (SL) - Continuous data acquisition: Data of periodically executed sweeps are recorded with equidistant time grid by means of a circular buffer (software license) |
| R&S ZNA-K100 | SNP assistant |