| 1 | Source polarization purity | B | Source polarization purity, positioner accuracy |
| 2 | AUT alignment | A/B | Receiving antenna alignment accuracy |
| 3 | Gain standard uncertainty | B | Standard horn antenna calibration certificate |
| 4 | Repeatability | A | Measurement raepeatability |
| 5 | Mutual coupling-SGH | B | Transmit-receive antenna mutual coupling |
| 6 | Multipath reflections-SGH | A | Transmitting sides reflection (ground and structures) |
| 7 | Leakage-SGH | A | Cable/facility leakage |
| 8 | Impedance mismatch | B | Reflection coefficient, instrument specifications |
| 9 | Receiver amplitude linearity | B | Receiver nonlinearity |
| 10 | Receiver dynamic range | A | Receiver dynamic range |
| 11 | Phase error | B | Phase measurement error |
| 12 | Mutual coupling-AUT | B | Interference factors around the AUT |
| 13 | Multipath reflections-AUT | A | Receiving-side reflection |
| 14 | Leakage-AUT | A | Receiver cable leakage |
| 15 | Environmental stability | A | Environmental conditions (temperature, humidity, wind speed, etc.) |