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Quick-Start Procedure for Digital DDC (Decimation Plus NCO) Mode in ADC32RF82
13
SLAU620D – April 2016 – Revised August 2017
Copyright © 2016–2017, Texas Instruments Incorporated
ADC32RFxx-EVM
4
Quick-Start Procedure for Digital DDC (Decimation Plus NCO) Mode in ADC32RF82
The clock rate in this example is 2Gsps.
4.1
TSW14J56
1. Connect the ADC32RF82 EVM to the TSW14J56 using the FMC connectors.
2. Connect a 5-V power supply to connector J11 (+5 V IN).
3. Connect a USB cable to the USB connector (J9).
4. Flip the power switch (SW6) to the “ON” position.
4.2
ADC32RF82 EVM
1. Verify jumper JP3 is set for position EXT to select external clocking.
2. Connect a 5-V, 3-A power supply to connector J15. Do not use a supply that is rated less than 3 A.
3. Connect a USB cable to the USB connector (J11 on the bottom side of board).
4. Connect an analog RF signal from a signal source to the AINP SMA (J2).
5. Connect a signal generator set at 2 GHz to the external clock input J5.
6. Connect another signal generator set for 2 GHz to the LMK04828 reference clock input J7. (Make sure
the two signal generators for the ADC clock and LMK04828 clock are synchronized to the same
timebase, or use a single signal generator and a splitter to generate two copies of the clock to go to
the EVM.)
Fs = 2 GHz, 8x Decimation Example, External Clocking
This example captures 8x decimated data from channel A of the ADC32RF82 EVM sampling at 2 GHz
with a 1860-MHz RF input source.
The ADC requires the device clock and SYSREF signals to be
present before the ADC can be properly configured so the LMK (and optional LMX, if used) setup
must have been done before configuring the ADC
.
1. Open the ADC32RFxx EVM GUI.
2. Verify that the green
USB Status
indicator is lit. If it is not lit, click the
Reconnect?
button and check
the
USB Status
indicator again. If it is still not lit then verify the EVM is connected to the computer
through USB. Whenever the USB link is disturbed, the GUI must obtain a new handle to address the
proper USB port, and the
Reconnect?
button does that.