Agilent Technologies B1500A Guía de usuario descargar pdf (Pagina 429)

100

101

Agilent B1500 User’s Guide, Edition 7 7- 47

Function Details

Atto Sense and Switch Unit

The ASU has output connectors, two triaxial, that must be connected to the DUT

interface such as manipulators and probe card. When the measurement resource is

the HRSMU, they are the Force/Sense connectors for the Kelvin connection. And

when the resource is not HRSMU, the CMU/AUX is connected to the Force, and the

Sense is not used.

If you connect the MFCMU or the LCR meter with the four-terminal pair

configuration, two ASUs ar

e required. Then the CMU-pot/CMU-cur connectors of a

ASU must be connected to the Hpot/Hcur of the instrument. And the other one must

be connected to the Lpot/Lcur in like manner.

To realize accurate impedance measurements using the four-terminal pair

measurement method, connect the C

MU Return terminals of ASUs together. See

“Four-Terminal Pair Configuration” on page 7-23 and Figure 7-14 on page 7-25.

NOTE To use 1 pA range

The measurement channel connected to the ASU (Atto Sense and Switch Unit)

supports the 1 pA range. To use the 1 pA range, set the 1 pA fixed range or the 1 pA

limited auto ranging.

The B1500A automatically performs the compensation of the data m

easured by the

1 pA range and returns the compensated data. You can use either the pre-stored

offset data or the pre-measured offset data.

To measure the offset data, perform the self-calibration before starting the

measurement for a D

UT. This offset data is temporarily memorized until the

B1500A is turned off.

NOTE Before using ASU

ASU connection must be done before Agilent B1500A is turned on.

The combination of ASU and HRSMU is important. The B1500A can work with

wrong com

bination, but it cannot satisfy its specifications. The specifications are

guaranteed for the correct combination which the performance verification was

performed. See “ASU” on page 4-43 and check if the combination is correct.

The CMU-pot connector is for the MFCMU or the LCR meter that uses the

four-terminal

pair. For the other instrument, connect a BNC open connector or

nothing to there. The line will be internally connected to the CMU-cur/AUX-in line.

It is unavailable to use the series resistor in the HRSMU connected to the ASU.

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