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EVM Setup and Operation

6. Connect the waveform-generator output between TP6 (TXIN) and TP2 (GND).

7. Connect the oscilloscope channel 1 to TP6 (TXIN).

8. Connect the oscilloscope channel 2 to TP17 (TXOUT).

9. Connect the oscilloscope channel 3 to JU4, pin2 (RES).

10. Example waveforms for a 115.2kbps setting are shown in Figure 4.

Figure 4. Time Domain Waveforms for 115.2kbps Transmission

11. Now look at the output spectrum of the transmitter by connecting a spectrum analyzer to J1. Example

output spectrum up to 30MHz for 115.2kbps setting is shown in Figure 5.

Figure 5. Emission Spectrum for 115.2kbps Transmission: up to 30MHz

SLLU152–December 2012 SN65HVD62 AISG On-Off Keying Modem Evaluation Module (EVM)

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