Datasheet

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TEST AFE5809

Figure 9. GUI: Single FFT Format

8.3 Step 3: Demodulator Mode

The AFE5809 has a special demodulation and decimation mode whose main purpose is to reduce the

LVDS data rate and improve overall system power efficiency. The device includes some built-in test

modes to verify that demodulator block is working correctly.

First, setup hardware as follows:

• USB cable connected to both EVMs

• External ADC clock enabled and used

• Sync external clock to analog sine burst source

• Connect analog input waveform to input channel 1

• Connect trigger from sine burst source that is synced with the analog signal to TX_Sync_in at J11

• Connect same trigger to TSW1400 EVM trigger input at J11

SLOU338A–October 2012–Revised November 2012 AFE5809EVM Evaluation Module

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