The GX6021 is a 300 MHz bandwidth, 3U high-density PXI switching card. The GX6021 has four groups of 1x4 Multiplexers configured by software to provide switch paths. Each switching group can be connected to the adjacent group. First and last group can be connected to one another using two additional relays providing a shorter connection path when possible for better bandwidth performance or to Daisy Chain to other GX6021 cards. All 20 channels of the GX6021 are differential.