Model 4200-TRX-* Tri axial Cable Assemb ly
Keithley Instruments
28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595
http://www.tek.com/keithley
Instruction Sheet
Description
The 4200-TRX-* Triaxial Cable Assembly consists of a standard triaxial cable terminated with a standard 3-slot
male triaxial connector on each end.
You can use this cable assembly for connections such as:
• Connecting a 4200-PA Preamplifier in the 4200-SCS or 4200A-SC S Parameter Analyzer to the device
under test (DUT).
• Connecting the 4200A-SCS Parameter Analyzer to the 4200A-CVIV Multi-Switch (4200-TRX-0.75).
• Connecting to the FORCE or SENSE terminal on the 4200-SCS or 4200A-SCS ground unit.
One end connects to the FORCE connector on the 4200-PA installed in the system. The other end connects to
the test fixture or probe station holding the DUT.
The 4200-TRX-* is available in different lengths. The -* in the model number represents the cable length in
meters (see next table).
Cable lengths
Model number Cable length (m) Cable length (ft)
4200-TRX-0.3 0.3 1
4200-TRX-0.75 0.75 2.5
4200-TRX-1 1.0 3.2
4200-TRX-2 2.0 6.5
4200-TRX-3 3.0 9.8
Figure 1: Model 4200-TRX-* cable
PA-702 Rev. B / September 2016 *PPA-702B* 1
Model 4200-TRX-* Triaxial Cable Assembly
Electrical spec ifications
Electrical impedance: 50 Ω
Frequency range: 0 Hz to 4 GHz
Working voltage:
Inner shield to outer shield: 250 VDC
Center conductor to outer shield: 250 VDC
Center conductor to inner shield: < 100 V
Insulation resistance: 1 x 10
Operating environment: 0 ºC to 50 ºC, up to 70 percent relative humidity at ≤ 35 ºC
Center conductor resistance: < 0.1 Ω per foot
13
Ω minimum
2 PA-702 Rev. B / September 2016
Safety precaut ions
The following safety precautions should be ob serv ed before using this product and any associated instr um enta tion . Altho ugh
some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using
the product. Refer to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained
service personnel may perform installation and service procedures.
Keithley Instruments products are designed for use with electrical signals that are measurement, control, and data I/O
connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high
transient overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to
mains. These instruments will be marked as category II or higher.
Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test
fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than
30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any
unknown circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.
For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.
Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the
specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)
connections.
The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.
PA-702 Rev. B / September 2016 3
The CAUTION heading in the user documentation explains h az ards that coul d dama ge the instrument. Such damage may
invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power
transformer, test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national
safety approvals may be used if the rating and type are the same. The detachable mains power cord provided with the
instrument may only be replaced with a similarly rated power cord. Other components that are not safety-related may be
purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be
purchased only through Keithley Instruments to maintain accuracy and functionality of the product). If you are unsure about the
applicability of a replacement component, call a Keithley Instruments office for information.
Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following
environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F) ; and pollution degree 1 or 2.
To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with
no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled
according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the
factory for proper cleaning/servicing.
Safety precaution revision as of March 2016.
4 PA-702 Rev. B / September 2016
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