7 Running the Demo
(Ask a Question)To execute the demo, perform the following steps:
- After programming the PolarFire FPGA Evaluation kit, connect AD9371 to the FMC connector.
- Connect the SMA cable to the J41 pin on the PolarFire FPGA Evaluation kit and J401 on the AD9371. This acts as the reference clock to the FMC card.
- Depending on the type of the demo
being used, connect the antennas to the respective transmitter and receiver of
the FMC card. if demo is running on two boards, connect one antenna to J305
(Tx1) of the first demo kit and connect second antenna to J200 (Rx1) of the
second demo kit.
Figure 7-1. Setting Up of Two PolarFire Evaluation Kit with AD9371 
- For running the demo on the same
board, connect one antenna to J305 (Tx1) and second antenna to the J200 (Rx1) of
the same board.
Figure 7-2. Setting Up of PolarFire Evaluation Kit with AD9371 
This SDR demo features the transmit and receive the data or image in the wireless medium. The data is transmitted through UART from GUI to the transmitter, then the data sent is packed, encoded, and modulated. The final modulated data is transmitted over the air and received at the receiver end.
Changing the Tx and Rx frequency
SDR demo runs in four different LO frequencies. Use the DIP switch SW11 to modify the LO frequency – ensure to configure the same frequency on the transmit and receive sides. In the two-board demonstration, the distance between the antennas is determined by the configured frequency. The following table lists the available LO frequencies.
| Switch [2:1] | LO Frequency |
|---|---|
| ON : ON | 700 MHz |
| ON : OFF | 1200 MHz |
| OFF : ON | 2400 MHz |
| OFF : OFF | 5800 MHz |