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The NI PXI/PXIe-2593 and NI SCXI-1193 modules can be configured as 3×1 Multiplexers. Refer to the following text, table, and figures for configuration instructions, and use the following links for module-specific implementations of this configuration.
Each group of four channels (0:3, 4:7, 8:11, etc.) can be configured as independent, unterminated 3×1 multiplexers. Choose one channel as the "common," and route it to the other three channels.
For example, choosing CH0 as a 3×1 common, route CH1, CH2, and CH3 to it with the command options described in the following table and figure.
|Route||Connect / Disconnect Calls Connection List||Individual Relay Control|
|CH0-> CH1||CH0->A0B0, A0B0->B0B1, B0B1->A1B1, A1B1->CH1||Close KA0, KA1 Open KB0, KB1|
|CH0-> CH2||CH0->A0B0, A0B0->B0B1C0, B0B1C0->C0C1, C0C1->B2B3C1, B2B3C1->A2B2, A2B2->CH2||Close KA0, KB0, KA2, KB2|
Open KB1*, KB3*, KC0, KC1
|CH0-> CH3||CH0->A0B0, A0B0->B0B1C0, B0B1C0->C0C1, C0C1->B2B3C1, B2B3C1->A3B3, A3B3->CH3||Close KA0, KB0, KA3, KB3
Open KB1*, KB2* KC0, KC1
|*Switch unused relays away from the signal path to improve high-frequency performance.|
Refer to the following figure for an example of a 3×1 configuration using CH0-CH3 on the NI PXI/PXIe-2593 or the NI SCXI-1193.
The NI PXI/PXIe-2593 can be configured as quad 3×1 multiplexers using its 16 channels. The COM terminals are unused.
The NI SCXI-1193 has 32 channels that can be divided into eight 3×1 multiplexers. Additionally, the four COM terminals can route together, creating a ninth 3×1 multiplexer, as shown in the following figure.