PXIe-5842 VST Block Diagram

The PXIe-5842 VST is a vector signal transceiver instrument that comprises an interconnected PXIe-5842 and PXIe-5655.

Figure 1. PXIe-5842 VST Block Diagram


Note Additional signal paths related to self-calibration not shown.

LO Path

The PXIe-5842 has two tunable local oscillators (LO) for the RF input and RF output signal paths via the PXIe-5655.

The PXIe-5842 module has no onboard frequency synthesizer; instead, it derives the LOs from the associated PXIe-5655.

Signal Distribution and LO Source Selection

The LO source is distributed to the downconverter or upconverter and the LO output signal path through the Signal Distribution. Refer to the Local Oscillators topic for more information about using an external LO with the LO IN front panel connector.

LO Out Signal Path

The PXIe-5842 supports the export of the LO IN signal to the LO OUT front panel connector. The LO output signal path is exported from LO IN through a programmable gain stage.