FPGA System A modulator

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FPGA System A modulator

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ppppenguin

Senior Engineer in Charge

Posts: 7,618
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Location: London N12

#49

05-12-2018, 11:38 AM

Just had another look at my modulator. I did 100% sound modulation with 1kHz audio on to a variable frequency carrier. At 10MHz the envelope looks perfect. At 41.5MHz the carrier is over 20dB down, mainly due to the analogue filter. I'm not prepared to muck about with the filter on this board so it's time to abandon the project.

I'm sure that basic vision and sound modulation will work OK with a single DAC using Frank's approach. Just a matter of getting the sums right.

www.borinsky.co.uk Jeffrey Borinsky www.becg.tv

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Messages In This Thread

FPGA System A modulator - by `FRANK.C - 17-11-2018, 01:06 PM

RE: FPGA System A modulator - by ppppenguin - 17-11-2018, 02:12 PM

RE: FPGA System A modulator - by `FRANK.C - 17-11-2018, 04:05 PM

RE: FPGA System A modulator - by Freya - 17-11-2018, 05:05 PM

RE: FPGA System A modulator - by Murphyv310 - 17-11-2018, 07:42 PM

RE: FPGA System A modulator - by ppppenguin - 17-11-2018, 07:51 PM

RE: FPGA System A modulator - by ppppenguin - 17-11-2018, 09:01 PM

RE: FPGA System A modulator - by `FRANK.C - 17-11-2018, 11:11 PM

RE: FPGA System A modulator - by ppppenguin - 18-11-2018, 07:03 AM

RE: FPGA System A modulator - by ppppenguin - 18-11-2018, 08:30 AM

RE: FPGA System A modulator - by ppppenguin - 18-11-2018, 10:24 AM

RE: FPGA System A modulator - by `FRANK.C - 18-11-2018, 09:33 PM

RE: FPGA System A modulator - by ppppenguin - 19-11-2018, 06:42 AM

RE: FPGA System A modulator - by `FRANK.C - 19-11-2018, 01:40 PM

RE: FPGA System A modulator - by ppppenguin - 19-11-2018, 02:11 PM

RE: FPGA System A modulator - by Nick - 19-11-2018, 02:29 PM

RE: FPGA System A modulator - by ppppenguin - 19-11-2018, 03:10 PM

RE: FPGA System A modulator - by `FRANK.C - 19-11-2018, 10:58 PM

RE: FPGA System A modulator - by ppppenguin - 20-11-2018, 09:22 AM

RE: FPGA System A modulator - by Terry - 20-11-2018, 09:59 AM

RE: FPGA System A modulator - by ppppenguin - 20-11-2018, 10:29 AM

RE: FPGA System A modulator - by Terry - 20-11-2018, 05:19 PM

RE: FPGA System A modulator - by ppppenguin - 20-11-2018, 11:08 AM

RE: FPGA System A modulator - by `FRANK.C - 20-11-2018, 06:58 PM

RE: FPGA System A modulator - by ppppenguin - 20-11-2018, 09:48 PM

RE: FPGA System A modulator - by `FRANK.C - 24-11-2018, 07:01 PM

RE: FPGA System A modulator - by Terry - 24-11-2018, 08:50 PM

RE: FPGA System A modulator - by Murphyv310 - 24-11-2018, 07:09 PM

RE: FPGA System A modulator - by ppppenguin - 24-11-2018, 09:35 PM

RE: FPGA System A modulator - by `FRANK.C - 25-11-2018, 10:07 AM

RE: FPGA System A modulator - by ppppenguin - 25-11-2018, 02:25 PM

RE: FPGA System A modulator - by Murphyv310 - 25-11-2018, 02:35 PM

RE: FPGA System A modulator - by Freya - 25-11-2018, 02:44 PM

RE: FPGA System A modulator - by ppppenguin - 25-11-2018, 06:22 PM

RE: FPGA System A modulator - by `FRANK.C - 25-11-2018, 06:51 PM

RE: FPGA System A modulator - by ppppenguin - 25-11-2018, 07:06 PM

RE: FPGA System A modulator - by `FRANK.C - 25-11-2018, 07:47 PM

RE: FPGA System A modulator - by ppppenguin - 25-11-2018, 09:42 PM

RE: FPGA System A modulator - by `FRANK.C - 25-11-2018, 11:19 PM

RE: FPGA System A modulator - by ppppenguin - 26-11-2018, 07:01 AM

RE: FPGA System A modulator - by `FRANK.C - 26-11-2018, 08:03 PM

RE: FPGA System A modulator - by ppppenguin - 28-11-2018, 02:51 PM

RE: FPGA System A modulator - by ppppenguin - 28-11-2018, 03:50 PM

RE: FPGA System A modulator - by ppppenguin - 28-11-2018, 04:59 PM

RE: FPGA System A modulator - by `FRANK.C - 28-11-2018, 06:27 PM

RE: FPGA System A modulator - by ppppenguin - 28-11-2018, 07:15 PM

RE: FPGA System A modulator - by `FRANK.C - 28-11-2018, 11:11 PM

RE: FPGA System A modulator - by ppppenguin - 29-11-2018, 07:32 AM

RE: FPGA System A modulator - by ppppenguin - 05-12-2018, 11:38 AM

RE: FPGA System A modulator - by `FRANK.C - 05-12-2018, 08:31 PM

RE: FPGA System A modulator - by ppppenguin - 05-12-2018, 10:06 PM

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