Used Yokogawa 700924 Differential Probe, 350V, 1000MHz

Product Highlights

• Bandwidth: DC to 100 MHz
• Attenuation: 1000:1/100:1
• Max. Input Voltage (to ground): ±1400 V (DC + ACpeak) or 1000 Vrms CAT III
• Max. Differential Voltage: ±1400 V (DC + ACpeak) at 1000:1 attenuation & ±350 V (DC + ACpeak) at 100:1 attenuation
• Probe Power: Internal battery or probe power supply

With increases in the speed of measured signals in recent years, it has become necessary to make floating measurements over a wide frequency band. The 700924 differential probe lets you make wide-band (100 MHz) differential input measurements by just connecting the probe to the input of a single-end input digital oscilloscope.

Oscilloscope input amplifiers are normally single-ended. They do not provide accurate measurements when used in combination with a 10:1 passive probe for measuring the gate-to-source voltage of a switching power supply, or potential difference with a common mode voltage in elements such as Insulated Gate Bipolar Transistors (IGBTs).

Furthermore, there is a risk that current will enter through the oscilloscope ground line and damage the oscilloscope.