Triaxial BNC has three concentric conductors (signal, guard, shield) for picoampere-level current measurements where cable leakage currents would corrupt the measurement. The guard is driven at signal potential to eliminate leakage.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | Inner | Signal high-impedance conductor | ADC |
| 2 | Guard | Guard driven at signal potential | I/O |
| 3 | Outer Shell | Ground outer shield | GND |
Triaxial BNC has three concentric conductors (signal, guard, shield) for picoampere-level current measurements where cable leakage currents would corrupt the measurement. The guard is driven at signal potential to eliminate leakage.