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Troubleshooting
Overall Description
Digital Modulation
The I/Q modulator circuits in the A8 Lowband, A35 3–20 GHz I/Q Modulator and the A13 I/Q
Multiplexer provide digital modulation.
The A13 I/Q Multiplexer provides the circuitry to generate the desired phase shifts and to drive the
I and Q modulators. A baseband generator (Option 002/602) can be added to generate complex
waveforms.
Baseband Generator (Option 002/602) Option 002/602 provides the instrument with a
baseband generator, which is used to generate complex waveforms. The A14 Baseband Generator
output is routed to the A13 I/Q Multiplexer and then to the I/Q modulators.
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