| 002 | DC-2GHz frequency range |
| 004 | DC-4GHz frequency range |
| 020 | DC-20GHz frequency range |
| 026 | DC-26.5GHz frequency range |
| 105 | 5 volt coils includes opt 402 (position indicators) |
| 115 | 15V coils |
| 124 | 24V coils |
| 201 | D-subminiature 9-pin connector female |
| 202 | Solder lug terminals |
| 301 | High isolation |
| 302 | Low standing wave ratio and ins loss |
| 401 | TTL/5V CMOS compatible drive |
| 402 | Position indicators |
| 403 | Current interrupts |
| C02 | 24V supply voltage without current interrupt and lubricant |
| UK6 | Commercial calibration certificate with test data included |