The GX3348 supports two configurations, GX3348/GX3348A with 48 channels and the GX3348-64/GX3348A-64 with 64 channels. The GX3348 has three analog rails and an additional ground rail that can be connected the full matrix, allowing any of the four rails to be routed to any of the 48 outputs (GX3348) or 64 outputs (GX3348-64). Each of the three analog rails has a dedicated programmable high current DC voltage source that can be programmed from -20V to +32V with 1mV resolution. The source of the rails can be set programmatically to a dedicated programmable high current DC voltage source, an external input, the chassis’ 5V power supply, the on-board amplifier’s output, or an internal pulse generator (Rail A only when using the GX3348A)
The GX3348 has four rails (Rail A, Rail B, Rail C and Ground Rail) that can be connected to various sources. Each rail has a set of resources that t can be accessed as follows.
Sources for Rail A:
High-resolution, programmable high current voltage source. Voltage range is –20V to +32V @ 500mA.
External source via the 78-pin front panel connector.
External input via the on-board amplifier, which has a nominal gain of 6.6.
Internal Generator, supporting pulse or square waveforms. Pulse base voltage can be from -20V to +32V, the pulse peak voltage can be set form -20V to +32V. Pulse width can be set from 1000 uSec to 4294967295 uSec with 1uSec resolution. Pulse delay time can be set from 1000 uSec to 4294967295 uSec with 1uSec resolution. The square waveform’s offset voltage can be set from -20V to +20V, with an amplitude (peak-to-peak) from 0 to 20V. The square waveform’s duty cycle can be set from 0.01% to 99.99%, with a period from 2000 uSec to 4294967294 uSec
Sources for Rail B:
High-resolution, programmable high current DC voltage source. Voltage range is –20V to +32V @ 500mA.
+5 volt power supply ( from the PXI backplane)
Sources for Rail C:
High-resolution, programmable high current voltage source. Voltage range is –20V to +32V @ 500mA.
External source via the 78-front panel connector.
Source for Ground Rail:
Ground (0V)
The figure below shows the GX3348 with and without its PXI J3 connector:
GX3348 Board with J6 I/0 Connector