
6 Device PowerSupply General Purpose Power Supply (GPDPS)
138 System Reference, January 2001
Important features of the General Purpose Device Power
Supplies are:
• Each DPS channel has two DACs for voltage setting. A
trigger input (Vbump input) lets you switch between
these two DACs.
• Each DPS channel is supplied with two current DACs -
one to set a positive current limit (clamp) and one to
set the negative current limit.
• Power up and hardware reset puts all four channels of
a GPDPS board into HIZ mode.
• Each DPS channel can measure the voltages and
currents supplied.
Maximum Number of Power Supplies
• 448 pin testhead: 16 slots, 1–4 GPDPS Boards (DPS1,
DPS2, DPS3, DPS8) with 4 DPS Channels each
• 960 pin testhead: 32 slots, 1–8 GPDPS Boards (DPS1–
DPS8) with 4 DPS Channels each
Switching DPS Voltages
Switching DPS voltages during test execution is possible
using the digital Vbump feature (refer to “Switching DPS
Voltages (Vbump)” on page 155)
Ganged GPDPS Channels
Parallel connections, in order to achieve a higher output
current, are possible for up to 32 channels (max. 4 group-
ings). But note that no parallel connections with different
supply types are possible (refer to “Ganging GPDPS Chan-
nels” on page 159)
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