.jpg "GX3104 Board (side view)")
The GX3104 consists of four identical source / measure channels which can be independently configured as voltage source / current measure or current source / voltage measure functionality. Each channel has the capability to source +/- 20 VDC or +/- 250 mA, providing four quadrant operations. In addition, the board’s flexible output configuration allows channel 0 to supply up to 1000 mA or alternatively, a combination of channels can supply up to 1 A of current. Note that channels 1, 2 and 3 can supply up to 500 mA. All four channels are galvanically isolated from the PXI bus and PXI ground but share a common isolated ground. Total output power of the module is 20W with module's power supplied by the PXI bus’s power supply rails.
A source / measure channel consists of a power opamp which can function as a programmable current source with a programmable voltage compliance or as a programmable voltage source with a programmable current limit. Each channel includes (2) 18-bit DACs for programming the voltage and current source values respectively. Measurement of voltage and current is supported by (2) 24-bit ADCs. In addition, each channel supports a kelvin sense line as well as a driven guard line, facilitating low current measurements.
A 25-pin D-type connector on the front panel supports the following signals:
Chassis ground
Power ground
(4) Hi connections, 1 per channel
(4) Hi guard connections, 1 per channel
(4) Hi Sense connections, 1 per channel
(4) Lo connections – common to all 4 channels
(4) Lo sense connections – 1 per channel
The figure below shows the GX3104 and the front panel interface J3 connector.
GX3104 Board (side view)