Yokogawa 700939 Active FET Probe, 10V, 900 MHz

The Yokogawa 700939 is an active FET probe engineered for high-frequency signal acquisition with minimal circuit loading effects. Operating across DC to 900 MHz, it delivers a 10:1 attenuation ratio and accepts maximum input voltages of ±10 V (DC + AC peak), with non-destructive overload capability to ±40 V. The probe’s high input impedance of 2.5 MΩ and low input capacitance of approximately 1.8 pF preserve signal integrity in demanding measurement environments.

– Technical Specifications

• Bandwidth: DC to 900 MHz (−3 dB)
• Attenuation Ratio: 10:1 ±2% (50 Ω ±1% oscilloscope input)
• Input Impedance: 2.5 MΩ
• Input Capacitance: ~1.8 pF
• Maximum Input Voltage: ±10 V (DC + AC peak)
• Maximum Non-Destructive Input Voltage: ±40 V (DC + AC peak)
• Scope Input Impedance Required: 50 Ω
• Connector: BNC output; LEMO pig-tail for power supply
• Cable Lengths: 1.5 m probe cable; 1.0 m power supply cable

– Key Features

• Active FET design minimizes loading on circuits under test
• High input impedance reduces signal distortion
• Includes earth lead, pincher tip, IC test tip, and earth attachment
• Power supply connection via Yokogawa oscilloscope (DL, DLM, SL, SB series) or external 701934 supply
• BNC connector ensures standard oscilloscope integration

– Typical Applications

Suitable for precision measurements in high-speed digital circuits, RF signal acquisition, and low-impedance node characterization where minimal probe loading is critical.

– Compatibility & Integration

Works with Yokogawa DL, DLM, SL, and SB series oscilloscopes and compatible high-performance measurement instruments equipped with 50 Ω BNC inputs. Requires external probe power supply (701934) or direct oscilloscope power connector.