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
11
SLOU338A – October 2012 – Revised November 2012
AFE5809EVM Evaluation Module
Copyright © 2012, Texas Instruments Incorporated