| 1399 | MIL-STD 1399-300 Test, B |
| 150 | Specifies 150 V output range (select one with standard controller) |
| 160 | RTCA/DO-160D test firmware. (AC and DC tests) |
| 208 | 208 ± 10 % VAC, L-L, Three phase |
| 230 | 230 ± 10 % VAC, L-L, Three phase |
| 300 | Specifies 300 V output range (select one with standard controller) |
| 400 | 400 ± 10 % VAC, L-L, Three phase |
| 411 | IEC 61000-4-11 pre-compliance test firmware. |
| 413 | IEC 61000-4-13 test firmware. |
| 480 | 480 ± 10 % VAC, L-L, Three phase |
| 704 | Mil Std 704E test firmware. Supports rev D and E. (AC and DC tests) |
| ABD | Airbus ABD0100.1.8 test software. Requires use of Windows PC (not included) and MXGui software (included) |
| B787 | Boeing 787 Test, Rev. C |
| HF | 16.00-1000 Hz (supplemental specifications apply above 819 Hz) |
| HV | Additional AC coupled 400 V L-N output range |
| LAN | LXI Ethernet Interface (disables RS232) |
| LF | Maximum frequency limited to 500 Hz |
| LKM | Clock and Lock mode, master |
| LKS | Clock and Lock mode, auxiliary |
| MB | Reconfiguration capability for Multi box power systems |
| P | RS232C and IEEE-488 remote control interface |
| R | Programmable Voltage Range change. Provides dual output voltage ranges. |
| SNK | Current Sink |
| WHM | Watt Hour Measurements |
| XV | Additional AC coupled output range, consult factory |