UMX FLIP Installation Guide download pdf (Page 20)

sender and receiver radio, and reveal the best receiver gain setting. To perform a since test, you

can follow the steps listed below:

1. Run HVT on two Sora boxes. Select “sine test” at both machines.

2. Configure one as the sender and the other as the receiver.

3. Select the sampling rate at the receiver that matches your RAB sampling rate.

4. Click “start” at the sender. You may notice the sender’s status bar displays the message

“Sending 1MHz sine wave”.

5. Click “start” at the receiver. Now you should be able to see the received signal like

Figure 3. The left window shows the energy plot of the signal and the right window

shows the constellation plot of I/Q samples. Since the transmitted signal is single sine

waveform, the constellation plot is a circle.

Figure 3. Received signal from the sine test.

You can perform the SNR test by selecting the SNR test mode and follow the similar steps as in

the sine test. In the SNR test, the sender transmits a wide-band 16-QAM modulated OFDM

signal. Figure 4 shows the received signal in both energy plot and constellation plot in the SNR

test. The actual SNR value is displayed in the SNR field in the main window.

You can further use HVT to find the best receiver gain parameters, I/Q imbalance and the CFO

between the two Sora boxes. For a complete reference of HVT, please refer to Chapter 11.4.

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UMX FLIP Installation Guide Page 20