PXIe-5611 Block Diagram

This topic contains information about the PXIe-5611 I/Q Modulator top-level block diagram and descriptions of the individual blocks.

The following list describes the individual blocks:

• Baseband input protects the baseband input circuit from potential damage.
• Baseband signal conditioning sets the proper level and bias for complex modulation.
• Complex modulation is the core function of the I/Q modulator and imparts complex baseband information to the LO IN signal.
• RF filtering reduces the harmonic content of the RF OUT signal.
• Pulse modulationpasses or interrupts the RF OUT signal under hardware control.
• Coarse RF power conditioning sets the level of the RF OUT signal in 1 dB increments.
• RF output protection protects the RF output circuit from potential damage.
• LO signal conditioning the LO IN signal in order to reduce harmonic content, thereby improving complex modulation. LO signal conditioning also level the gain from LO IN to LO OUT and enables or disables the LO OUT signal.