Oscilloscope Probes

High Voltage Fiber Optically-isolated Probes

The new HVFO108, with 150 MHz of bandwidth, is suitable for both Silicon and Silicon Carbide designs. It is designed to measure small signals floating on an HV bus and delivers excellent performance, has high CMRR, and provides optical isolation to reduce DUT loading.

Explore High Voltage Fiber Optically-isolated Probes Explore High Voltage Fiber Optically-isolated Probes

   High Voltage Fiber Optically-isolated Probes

HVFO108 - High Voltage Fiber Optic Probe, 150 MHz Bandwidth. Includes soft-carrying case. Requires attenuating tip (ordered separately). Includes Qty. 1 1m Fiber Optic Cable.
HVFO100-1X-TIP-U - HVFO10X +/-1V (1x Attenuation) Universal Tip Accessory
HVFO100-5X-TIP-U - HVFO10X +/-5V (5x Attenuation) Universal Tip Accessory
HVFO100-10X-TIP-U - HVFO10X +/-10V (10x Attenuation) Universal Tip Accessory
HVFO100-20X-TIP-U - HVFO10X +/-20V (20x Attenuation) Universal Tip Accessory
HVFO100-40X-TIP-U - HVFO10X +/-40V (40x Attenuation) Universal Tip Accessory
HVFO-1M-FIBER - HVFO 1m Fiber Optic Cable Accessory
HVFO-6M-FIBER - HVFO 6m Fiber Optic Cable Accessory
Key Features
  • 150 MHz bandwidth
  • 35 kV common-mode voltage rating
  • Silicon Carbide Suitable
  • Superior Noise and Rejection
    • 140 dB CMRR
    • Low loop inductance
    • Low attenuation
  • Reduced DUT loading, better pulse response compared to conventional HV differential probes
  • Selectable tips for from +/-1V to +/-40V


Silicon Carbide Suitable

The new HVFO108, with 150 MHz of bandwidth, is perfect for device research engineers designing Silicon and Silicon Carbide devices, and system development engineers incorporating Silicon Carbide devices.

Upper-side Gate Drive Signal Measurements

The HVFO108 faithfully reproduces upper-side gate drive signals without loading and distortion, allowing a clear view of the Miller effect. Any conventional HV differential probe with high tip capacitance in parallel with CGE or CGS, and/or high impedance and large loop inductance in series with the gate drive impedance will at best load the gate drive signal or pick up interference and at worst cause circuit malfunction. The HVFO108 performs much better for these measurements.

Floating Control or Sensor Signal Measurements

The HVFO108 measures only the low voltage sensor voltage across its high impedance input leads. Total load on the device under test (DUT) is very small. Furthermore, the low lead loop inductance, >100dB CMRR, and low attenuation provide superior signal fidelity, noise and rejection.

EMC, EFT, ESD and RF Immunity Testing and System Optimization

AC and DC sensor signals floating at a high voltage or in the presence of EMC disturbance signals can be acquired with high signal fidelity and correctly correlated to in-circuit and control activities.

Optical Isolation is Best

Optical isolation between the probe tip and the oscilloscope input reduces adverse loading of the DUT, provides faithful pulse response, and increases confidence in the measurement. Safety against dangerous high voltage levels can be ensured and unsafe "floating" of the oscilloscope can be avoided.

Superior Noise and Rejection

High CMRR (140 dB) provides more accurate representation of the measured signal despite the presence of high dV/dt or dA/dt events elsewhere in the circuit. The test lead is optimized to limit loop inductance and radiated pickup. Tip attenuations are optimized for a wide range of signal amplitudes.