Features Specifications Comparison Table
Quantum Design Oxford MultiSwitch - Optimised for Driven Guard Measurements

Optimised for Driven Guard Measurements

MultiSwitch

Designed for the Universal Measurement Probe's driven guard wiring option, MultiSwitch provides triaxial connections that enable the reduction of leakage currents and capacitive effects during low-current measurements. Make-before-break switches help protect sensitive samples and devices against accidental electrostatic discharge (ESD), while flexible signal switching and grounding options provide greater control over electrical connections throughout your measurement process.

Features

  • Triaxial or BNC connectors for each channel.
  • Integrated cable for connection to the driven guard wiring option of the Universal Measurement Probe.
  • High-quality make-before-break switches allow switching of signal lines between signal, measurement ground or protective ground.
  • 2U high and designed for 19" rack mounting.

Why Choose MultiSwitch

  • The room-temperature measurement cable is construct of individually screened twisted pairs to help minimise electrical interference and crosstalk between measurement channels.
  • The individually screened twisted pairs allow each channel to be referenced to a different measurement ground or configured as a driven guard, reducing leakage currents and effective capacitance to improve measurement accuracy and response times, particularly for high-impedance samples and devices.
  • Internal signal line routings are designed to minimise crosstalk and line resistance is kept to a minimum.
  • Independently switchable signal lines provide flexible measurement and grounding options, with resistive discharge paths to help safely dissipate accumulated electrostatic charge before direct grounding, reducing the risk of damage to sensitive samples and devices during experimental setup.

Specifications

Physical Specifications MultiSwitch Breakout Box
Dimensions W 482 mm x D 195 mm x H 88 mm
Weight 4.1 kg
Front Panel Connectors 6 Triaxial / 12 BNC
Rear Connector 19-way Fischer
Operating Ambient Temperature 20 to 30° C
Channel Specifications MultiSwitch with 10 m Room-Temperature Measurement Cable
Voltage Rating 50 VRMS
Recommended Frequency Range DC – 100 kHz
Mutual Capacitance 370 pF
Line Inductance < 3.0 µH
Conductor DC Line Resistance < 0.8 Ω
Guard DC Line Resistance < 0.7 Ω
Shield DC Line Resistance < 0.8 Ω
Channel to Channel Isolation (DC) > 1 GΩ
Channel to Guard Isolation (DC) > 1 GΩ
Channel to Chassis Isolation (DC) > 0.6 GΩ
Impedance versus frequency measured between the signal lines of a twisted pair using the MultiSwitch and integrated 10 m room-temperature measurement cable.

Figure: Impedance versus frequency measured between the signal lines of a twisted pair using the MultiSwitch and integrated 10 m room-temperature measurement cable. (Left) Open circuit – signal lines not connected at the measurement cable end. (Right) Closed circuit – signal lines connected at the measurement cable end.

Comparison Table

  IsoSwitch SampleProtect MultiSwitch
Signal Lines 24 (12x Twisted Pairs) 24 (12x Twisted Pairs) 12 (6x Twisted Pairs)
Front Connections 24 BNC 24 BNC/12 Twinax 6 Triaxial /12 BNC
Guarded Measurements No No Yes
ESD Protection No Yes Yes
Measurement Cable Connector 24-way Fischer 24-way Fischer 19-way Fischer
Compatible Systems and Probes
  • Basic Probe
  • Universal Measurement Probe – Unshielded and Driven Guard
  • HelioxVT
  • Proteox
  • Basic Probe
  • Universal Measurement Probe – Unshielded and Driven Guard
  • HelioxVT
  • Proteox
  • Universal Measurement Probe – Driven Guard