Agilent Technologies B1500A Service Manual Page 150

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2-64 Agilent B1500A/B1505A Programming Guide, Edition 11
Remote Mode Functions
Module Selector
Module Selector
The Agilent N1258A Module Selector is used to switch the measurement resources
(HP/MPSMU, HC/DHCSMU, and HVSMU/HVMCU) connected to DUT (device
under test). The Input ports must be connected to the HP/MPSMU, HC/DHCSMU,
HVSMU/HVMCU, and GNDU. And the Output port must be connected to the DUT
interface. For the packaged devices, use the Agilent N1259A test fixture which can
install the module selector.
Use the ERMOD, ERHPA, ERHPL, ERHPS, and ERHPP commands to control the
module selector.
The ERMOD command sets the Digital IO control mode.
The ERHPA command specifies the measurement resources connected to the input.
The ERHPL command sets the condition of the status indicator.
The ERHPP command sets the module selector input-to-output connection status.
The ERHPS command controls the connection of the HVSMU series resistor.
Figure 2-36 Module Selector Block Diagram and Connections
CAUTION For the measurement using dual HCSMU (DHCSMU), the maximum current must
be ± 30 A to prevent the module selector from performance degradation and failure.
Front view
DUT high terminal
DUT high
HPSMU
DUT low
Module Selector
Open
High
HVSMU
HCSMU
GNDU
Low
AC power
B1505A Digital I/O
HCSMU Force+Sense
HPSMU Force+Sense
GNDU Force+Sense
HVSMU Force
Rear view
DUT low terminal
Open
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