
Parametric Measurement Units 3 Hardware Components
System Reference, January 2001
45
Parametric Measurement Units
The SOC Series is equipped with two types of Parametric
Measurement Units (PMUs):
• Pin PMU, associated with a board ADC per 16 pins
• High-Precision PMU per 128 pins
For additional information on the PMUs, refer to the Stan-
dard Test Function Reference.
Pin PMU
Each digital channel provides an independent unit for DC
tests—the Pin PMU.
Figure 21 Pin PMU and Board ADC
The Pin PMU returns pass/fail signals to the test
processor. Two compare voltage levels received from the
level generator are used as thresholds.
One measurement PMU is available on each channel board
comprising 16 channels.
The analog monitor output of the Pin PMU is linked to the
Board ADC via a multiplexer. The Board ADC converts the
analog values it receives from the Pin PMU to digital
values.
Pin PMU 1
Board ADC
per 16 Channels
PPMU
Relay
monitor_ou tUsed for Valu e
Measu rement
Used for Pass/Fail
Measu rements;
PerPinResou rce
DUT
MUX
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