ADC32RF80 Quick-Start Procedure (Digital DDC Block - Decimation Plus NCO) External Clocking
20
SLAU620A – April 2016 – Revised May 2016
Copyright © 2016, Texas Instruments Incorporated
ADC32RF45/RF80 EVM Quick Startup Guide
7. Select “Channel 1/8” in the channel select window located at the top middle of the GUI.
8. Click the
Instrument Options
menu at the top of HSDC Pro and select
Reset Board
.
Figure 19. Resetting the TSW14J56
9. Click
Capture
in HSDC Pro to capture data from the ADC.
10. Select
Complex FFT
11. The result should match the example capture in
The input tone is seen to be near 60 MHz because the signal generator is set to 1.96 GHz while we
set the NCO in the ADC to 1.90 GHz. So, the input tone is mixed down to 60 MHz. If the signal
generators for the analog input tone and the clocking are synchronized, then HSDC Pro is able to
locate the expected tone after the NCO and decimation by way of the popup parameter window of
. If this popup is used, the frequency values entered must be exact.
Figure 20. Popup Window for Setting HSDC Pro Decimation Factor and NCO Frequency
