Picoprobe Active Probes

Active Probing System

Signatone offers Picoprobe low capacitance / high speed active probe arms and accessories. These probes arms have a FET amplifier either in or near the tip and are designed for measuring internal node voltages without capacitively loading the circuit.

An active probing systems consists of an active probe arm, a Picoprobe power supply (capable of simultaneously driving two active probe arms), a micropositioner and an active probe tip.

Active Probe Arms:

Picoprobe Active Probe Arm Specifications:

SP-12

  • 0.1 pf input capacitance
  • 1.0 megohm input resistance
  • 0.8 ns rise / fall time
  • dc to 500 MHz bandwidth
  • 0.5% linearity
  • -10V to +20V voltage range
  • +3% gain accuracy
  • signal attenuation of 10 to 1 (high impedance) or 20 to 1 (50 ohm input)

SP-18

  • 0.02 pf input capacitance
  • 10-14 A input leakage
  • 1.2 ns rise / fall time
  • dc to 350 MHz frequency response
  • 0 to +15 volts operating range
  • 0.2% linearity-5V range
  • 2.0% linearity-15V range
  • +5% gain accuracy
  • signal attenuation of 10 to 1 (high impedance) or 20 to 1 (50 ohm input)

SP-19

  • 0.02 pf input capacitance
  • 10-14 A input leakage
  • 1.2 ns rise / fall time
  • dc to 350 MHz frequency response
  • 7V to +8V operating range
  • 0.2% linearity-5V range
  • 2.0% linearity-15V range
  • +5% gain accuracy
  • signal attenuation of 10 to 1 (high impedance) or 20 to 1 (50 ohm input)

SP-28

  • 0.04 pf input capacitance
  • 10-14 A input leakage
  • rise / fall time = 350 ps + volt pulse of less
  • dc to 1 GHz frequency response
  • -3V to +10V operating range
  • linearity: 0.5% -1V to +4V range
  • 2.0% -3V to +10V range
  • signal attenuation 20 to 1 (50 ohm input)

SP-29

  • 0.04 pf input capacitance
  • 10-14 A input leakage
  • rise / fall time = 350 ps + volt pulse of less
  • dc to 1 GHz frequency response -3db
  • -7V to +6V operating range
  • linearity: 0.5% (-2V to +2V range
  • 2.0% (-7V to +6V range
  • signal attenuation 20 to 1 (50 ohm input)

SP-34

  • 0.1 pf input capacitance
  • 10 megohm input resistance
  • DC to 3 GHz
  • -7 to +10V operating range

 

Active Probe Tips:

Active Probe Tips are available for each of the above mentioned active probe arms. Tips are available with tip diameters of 3 micron, 1 micron or 0.2 micron diameter.

Active Probe Power Supply

The Picoprobe active probe power supply can simultaneously drive two model SP-12, SP-18, SP-19, SP-28 or SP-34 active probe arms.

SP-7 Shielded Probe Arm

The SP-7 is a shielded probe arm that is used with a special tip to provide a shielded environment to within 3 mm of the tip end. The SP-7 can be used for capacitance and resistance measurements in low to medium speed (up to 500 MHz) signal applications. The tip is sheathed with Teflon and then an outer steel jacket.

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