Microtest Products:
For your toughest testing challenges
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MT 101 W
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The MT 101 W is a production test fixture with 2 RF ports and 2 DC ports.
Careful ground contact definition allows operation to frequencies well above the moding frequency of the package. A unique lever locking mechanism guaranties easy operation. Low VSWR transitions make it unnecessary to calibrate the fixture internally in most cases.
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MT 109
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This concept is for packages which go to very high frequencies and need precise ground-contact definition. One torque-wrench supplies contact pressure (X&Y) independently in 2 axis. Cables for strain-relief are also available on all these ports (mixer - example).
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MT 71W
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The MT 71W has 4 microwave ports which can handle frequency well above the moding frequencies of the package. A unique lock-and release mechanism allow fast operation. The ground contact mechanism is designed for minimum ground loop and maximum heatsink properties.
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MT 113
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This fixture is an example of a family of fixtures where testing of packages on circuit boards is desired, The design is such that proper line-up and proper contact force is achieved. It is available in 2 versions. a) MT113 economy - version slower testing. b) MT 146 higher thru-put but same concept.
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MT 130
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These fixtures have about the same characteristics as MT193. Additional features include: Lever closing mechanism, Ejection mechanism, Adjustable contact force, Exchangeable ports, Life bug - dead bug testing
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MT 0785W
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The MT 0785W has been designed for long lead packages. In order to achieve repeatability and non-resonant performance, one has to make multiple contact points along the leads. The RF ports have a good VSWR and it is therefore not necessary to calibrate inside the fixture up to ~ 4 GHz.
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MT 0786
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The MT 0786 has a series of features which are listed below: High performance to cost ratio, Simplicity of operation, Long life (>30000 pcs. between maintainance), Operator independent contact pressure, Useable without calibration up to ~ 12 GHz, Calibration standard available (800 MHz to 26 GHz), Bias networks optional
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MT 131-1
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This is a fixture-insert for an automatic handler (89 packages mostly). It has low VSWR transitions needed for scalar-measurements. Life tests have shown handling of more than 1 million parts between maintenance. Unique grounding allows operation to very high frequencies without moding. Cost effective design. Solt calibration components in development.
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MT 108
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The MT 108 is an example for a coaxial test fixture with LRL Calibration Standard. Coaxial inserts like Attenuators, Equalizers, Filters, Phaseshifters, etc. are examples for the DUT. The fixture works now to 18 GHz. It can easily be scaled to work up to 40 GHz. Also coaxial CAL standards are available to achieve higher measuring accuracy.
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MT 140
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This multi-port test fixture is for testing can-like packages to... 15GHz. It has the following features: Exact height adjustment for line up with test equipment. Tolerance absorbing ports with good VSWR, Verification components available, Precision cables (S11< - 30db) can externally connect ports. Unique, reliable closing mechanism
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MT 143
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This fixture is an example for automatic port switching with a repeatability of 0.03db. Any Microtest fixture can be expanded with this concept.
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MT 110
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The MT 110 is a test fixture for TO-8 like packages. The transitions have typical a VSWR of <1.1 to 10 GHz. The moding frequency is 35 GHz. The isolation is >70db from DC to 12 GHz. LRL Calibration components are available for better measuring accuracies. Three RF-ports and DC-ports are provided in this fixture.
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MT 187
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The MT 187 fixture features high contact-density and long life. It has two levels of microwave connections (total 15). In addition to this it has 16 independent low inductance ground contacts. A special lever close mechanism supplies constant contact force and is easy to operate.
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MT 0786A
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This fixture was designed to work with an ismeca handler. Thru-out between maintenance is about 500,000. The concept used is "life-bug" testing. Dual action (positioning and contact clamping) was necessary in this case.
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MT 98W
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The uniqueness of the MT98 is the signal - and ground contact designs. The signal contact is a patented design to 40+ GHz. The ground contact highly repeatable and has minimum parasitics. The circuit (DUT) is leadless and demanded non-destructive testing. The contact force is minimum and constant with every insertion.
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MT 147
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This fixture is an example of a highly repeatable isolator test fixture. It's cost-effective design make it suitable for engineering and prototype testing. The middle-port can be moved to allow S11 and S22 testing.
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MT 96W
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The MT 96W is a 3 RF-port and 2 DC-port package test fixture. It is designed such that the leads of the package do not change the characteristic impedance of the fixture. The measurement is therefore performed in a "close to 50 Ohm System". This also eliminates the need of calibration and therefore allows the use of a less expensive Scalar-Network Analyzer. The DC contacts have two contact points each and are balanced forcewise. An ejection button speeds up operation.
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MT 79W
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The MT 79W is a test fixture for packages with long leads. The long leads are placed in a field free region within the fixture in such a way that a high degree of repeatability is achieved. Ground contacts are springy to absorb package tolerances. Two DC-contacts and an ejection mechanism are part of the fixture. A dielectric drawer transmits the proper contact force which is provided by a leaf spring.
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MT 74A
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The MT 74A is a fixture which tests packages in the same environment they are used later in the final assembly. It could be called sub-assembly testing. Due to a patented springy signal contact, the fixture has a medium throughput as is, but could be made faster. The circuit board can easily be exchanged. Two springy DC-contacts are provided via feed thrus.
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MT 172
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Accurate and repeatable testing of microwave power-transistors with vector network analyzers becomes increasingly desirable. This unique "state of the art" fixture features: Build in impedance transformers, Good heatsinking, Calibration standards (LRL), Unique heat dissipation, Self aligning RF-ground contacts, Insensitive to package to tolerances.
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MT 176
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The MT 176 tests micro strip circuits with variable X-Y size and has springy ( no solder ) transitions. This fixture has multiple RF ports and can also have multiple DC ports. It is basically an engineering or low thru-put production fixture. A patented coax to micro strip "springy" transtion avoids soldering.
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MT 680W
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The MT 680W is a fixture which closes pneumatically. The closing and opening requires an electrical input. The Pressure, with which the circuit is pushed against the fixture nest for heat-conduct, can be adjusted on an incl. valve. The leads on the circuit are pushed down by an independent, constant force for good repeatability. One of the closing plates is moving for loading convenience. The cooling system is optional. It an be air or liquid. High current bias networks are usually required. They are available on request.
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MT 61A
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The model MT 61A is a "burn in" fixture for circuits as shown and similar. The advantage is dual function design ("burn-in" + "on board test") which ensures proper contact with the board. It works over a large temperature range and is easy to use. The same concept is now used to build microwave test fixtures for packages with similar gullwing design. Also fixtures with medium "thru-put" are built this way. In combination with "designer kits" this fixture is suitable for designing external circuitry in an efficient manner. The upper frequency is about 6 GHz.
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MT 181
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This fixture is an example for a fixture which measures packages with the BGA contact mechanism. All contacts are independently sprung to assure the "right" contact pressure. DC-connections terminate in a 9 pin standard connector (D).
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MT 193
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The MT 193 has 26 low freq. (DC) ports and 6 RF ports. The pitch is .045". The contact mechanism is unique. The contact forces are independent and controlled. The transition - discontinuity "fixture - DUT" is minimized.
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MT 199
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The MT 199 is for testing BGA - packages. It compensates for unequal eights of the bumps. Thru - lines are available with low VSWR. Pitches down to .045" are easily achievable.
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MT 203-1
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The MT 203-1 allows you tuning of the microwave ports. The tuning in this case is an impedance transformation. Variable capacitor and variable inductor are insertable elements. This DUT is a filter.
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