You must ensure that the adapter setting is properly set after you finish connecting accessories to the four-terminal pair port of the E4990A and before you start measurement. If required, change it to the correct adapter setting. The adapter setting includes adapter selection and the data acquisition process, which is called adapter setup. The following table lists the device connections and corresponding adapter settings.
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Device Connection |
Accessory |
Adapter Selection |
Adapter Setup (data measurement) (√: required; blank: not required) |
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Phase *1 |
OPEN |
SHORT |
LOAD |
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A. Connect a direct connection type test fixture to the four-terminal pair port of the E4990A and connect the device to the fixture contacts. |
16034E 16034G 16034H 16044A 16047A 16047D 16047E 16065A *2 16089A *2 16089B *2 16089C *2 16089D *2 16089E *2 |
No Adapter (NONE) |
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B. Extend the four-terminal pair port of the E4990A with a 1-meter-long four-terminal pair configuration and connect the device. |
16048G and test fixture 16048G and 16452A |
Four-terminal pair, 1 meter (4TP 1M) |
√ |
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√ |
|
16334A *3 |
Four-terminal pair, 1 meter (4TP 1M) |
√ |
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16451B *3 |
Four-terminal pair, 1 meter (4TP 1M) |
√ |
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C. Extend the four-terminal pair port of the E4990A with a 2-meter-long four-terminal pair configuration and connect the device. |
16048H and test fixture 16048H and 16452A |
Four-terminal pair, 2 meters (4TP 2M) |
√ |
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√ |
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D. Connect the 42942A directly to the four-terminal pair port of the E4990A, connect a dedicated test fixture to the 7mm port, and then connect the device to the fixture contacts. (Only for Option 120) |
42942A and 16092A 42942A and 16192A 42942A and 16454A |
42942A Terminal Adapter (7mm 42942A) |
√ |
√ |
√ |
√ |
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E. Connect the 42942A directly to the four-terminal pair port of the E4990A, connect a coaxial cable to the 7-mm port, connect a test fixture, and then connect the device to the fixture contacts. (Only for Option 120) |
42942A, coaxial cable, and test fixture |
42942A Terminal Adapter (42942A Extension) |
√ |
√ |
√ |
√ |
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F. Connect the 42941A directly to the four-terminal pair port of the E4990A, connect a dedicated probe adapter to the SMA port, and then connect the device to the adapter contacts. (Only for Option 120) |
42941A and probe adapter |
42941A Impedance Probe (PROBE 42941A) |
√ |
√ |
√ |
√ |
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G. Connect the 42941A directly to the four-terminal pair port of the E4990A, connect a coaxial cable to the SMA port, connect a test fixture, and then connect the device to the fixture contacts. (Only for Option 120) |
42941A, coaxial cable, and test fixture |
42941A Impedance Probe (42941A Extension) |
√ |
√ |
√ |
√ |
*1. Phase compensation.
*2. Although it has a cable, it is considered a direct-connection-type test fixture.
*3. Clear the adapter setup before you start the fixture (System > Service Menu > Clear Adapter Setup)