| 1CM | Rack Mount Kit |
| 1CN | Front Handle Kit |
| 1CP | Rack mount and handle kit |
| 503 | 3 Hz - 3.6 GHz |
| 508 | 3 Hz - 8.4 GHz |
| 526 | 3 Hz- 26.5 GHz |
| 544 | 3 Hz - 44 GHz |
| B25 | Analysis bandwidth, 25 MHz |
| B85 | Analysis bandwidth, 85 MHz |
| C35 | APC 3.5 mm connector |
| CNF | Type N Connector |
| CR3 | Connector Rear, 2nd IF Output. |
| DP2 | Digital Processor, 2 GB Capture Memory |
| EXM | External Mixing |
| SS1 | Additional removable solid state drive, Win10 |
| WXP | Windows Embedded XP |
| YAS | Y-Axis Screen Video Output |