I am trying to figure out the best way to clean up an AM signal. I am testing with an antenna, amplifier, and LP filter with a cutoff freq of 3MHz--this gives about 60mV for a specific radio station. Using the Frequency Translation example provided with the NI5640R, I have translated the specific AM signal to baseband. Before being transmitted through the DAC, I have scaled the output as high as possible without exceeding the DAC's full scale output range of 0.8Vpp. After looking at the O-scope, it appears the AM signal is 425mVpp--more than enough to be able to hear through a speaker (screenshot provided). Unfortunately, the AM station can barely be heard with the volume at max. I am wondering if the ADC on the card decreases the SNR too much to reproduce a good signal before outputing. Any suggestions? Digital Filter through HOST? -Troy

IF-RIO

AM Signal

Hello Mr .Sandeep,
Aman here, last week I mailed you about my problems on your ID, but i didn't get any responce from your side.

Please help me out to generate SSB and LSB with 5640R card ASAP.

Thanks n Regards.

Message 21 of 21

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IF-RIO

AM Signal

Re: not Getting the Side bands and Power spectrum