AWG G3 PAD FOR PS3 Specifikace Strana 162

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6 Device PowerSupply General Purpose Power Supply (GPDPS)
162 System Reference, January 2001
Disconnecting the DPS
A connected DPS forces the programmed power supply
voltage (FW command PSLV). The current is limited to the
connect current limit.
If the supply reaches the current limit, the voltage at the
DUT is decreased. In this case, warnings are displayed in
the Report Window.
A disconnected DPS can be in one of two modes:
High-Impedance Mode
•Low-Impedance Mode
High-Impedance Mode
In high-impedance mode (HIZ), the DPS is switched to
high-z mode.
Impedance = 10 k (Revision A) and 1 M (later revi-
sions)
In order to activate the high-impedance mode, set the
impedance in the PSLV firmware command to “HIZ”.
NOTE At power-up of the test system all DPS channels are set to
HIZ mode.
Low-Impedance Mode
In low-impedance mode (LOZ), the DPS is active, forcing
0 V (General Purpose DPS). This allows capacitors to
discharge after disconnecting the DPS channel.
In order to activate the low-impedance mode, set the
impedance in the PSLV firmware command to “LOZ”.
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