Features Specifications Comparison Table
Quantum Design Oxford IsoSwitch - Simple and Direct Signal Connections

Simple and Direct Signal Connections

IsoSwitch

IsoSwitch provides a simple and reliable way to connect measurement instruments to sample wiring, offering 24 BNC connections for straightforward signal access. With the option to independently float or ground the outer BNC shields, IsoSwitch allows users to configure grounding arrangements to suit their measurement requirements. Designed for less sensitive samples where advanced signal protection is not required, IsoSwitch offers a practical, cost-effective solution for connecting your measurement instruments to your sample.

Features

  • BNC connectors for each signal line.
  • 50-way rear-mounted D-sub connector for connection to the measurement probe or cryostat via a 10 m room-temperature measurement cable.
  • 2U high and designed for 19" rack mounting.

Why Choose IsoSwitch

  • 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 individual channels to be referenced to different measurement grounds.
  • Internal signal line routings are designed to minimise crosstalk and line resistance is kept to a minimum.

Specifications

Physical Specifications IsoSwitch Breakout Box
Dimensions W 482 mm x D 93 mm x H 88 mm
Weight 1.9 kg
Front Panel Connectors 6 Triaxial / 12 BNC
Rear Connector 50-way D-sub (24-way Fischer with 10 m room-temperature measurement cable)
Operating Ambient Temperature 20 to 30° C
Channel Specifications IsoSwitch Breakout Box Only IsoSwitch with 10 m Room-Temperature Measurement Cable
Voltage Rating 50 VRMS 50 VRMS
Recommended Frequency Range DC – 100 kHz DC – 100 kHz
Mutual Capacitance 2.5 pF 160 pF
Line Inductance < 2.0 µH < 2.3 µH
Conductor DC Line Resistance < 0.5 Ω < 1.7 Ω
Shield DC Line Resistance < 0.3 Ω < 1.7 Ω
Channel to Channel Isolation (DC) > 1 GΩ > 1 GΩ
Channel to Chassis Isolation (DC) > 1 GΩ > 1 GΩ
Impedance versus frequency measured between the signal lines of a twisted pair using the IsoSwitch and a 10 m room-temperature measurement cable.

Figure: Impedance versus frequency measured between the signal lines of a twisted pair using the IsoSwitch and a 10 m room-temperature measurement cable. (Left) Open circuit – signal lines not connected at the back of the breakout box or 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