14. Change the view window from
Real FFT
to
Complex FFT
and select channel 1/4.
15. Press the
Capture
button. You should now see something similar to
16. Adjust signal generator output such that the measured fundamental power in HSDC Pro is at the user's
desired level.
Figure 4-4. 789.995 MHz input, 8x complex decimation, 1x averaging, dither on
4.2 128x Complex Decimation
This example uses a coherent 1.003 GHz input on the channel B input with the ADC in a 2x averaging mode
with dither enabled.
Procedure
1. Under the
Analog and Clock
tab, toggle
Dither Enable
to the on position and set
Dither Amplitude_1
to 3.
2. In the
Bypass Mode
box, use the DDC dropdown to change to
Complex Mode
. You will notice that the
box title changes to
Complex Mode
to reflect the current DDC operating mode. Press the
Home Button
to
change back to the home screen.
3. Set
Average
to
2x
and change
ADC Mode
to
Dual with averaging
.
4. Use the
Decimation
dropdown to change the decimation to
128
.
5. Set the
LMFSHd
setting to
1-4-8-1-0.
6. Set the channel INB1
NCO0
and
NCO1
to 1000 (MHz).
7. Change
LMK divider
from 8 to 32.
8. Once these settings are verified and match
, press the
Device Bringup
button.
Quick Start Procedure for Complex Decimation Mode
10
ADC32RF5xEVM User Guide
Copyright © 2021 Texas Instruments Incorporated
