Timeline for Modulation scheme for simple signal generator
Current License: CC BY-SA 3.0
4 events
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| Apr 24, 2017 at 12:45 | comment | added | Marcus Müller | no, that's not the idea :) You modulate a 10 MHz carrier, and then mix it down by 9.5 MHz (10 MHz - 9.5 MHz = 500 kHz) to 8.4 (10 MHz-8.4 MHz = 1.6 MHz) to get the signal you want. It is a superhet, with the IF > RF :) You're absolutely on the right track. Whenever mixing, you get both the sum and the diff frequency, see my first formula :) | |
| Apr 24, 2017 at 12:43 | comment | added | Buck8pe | I'm struggling to see how you extract the difference frequency. Can you expand a little on the last paragraph? It sounds like a good idea (sort of like the LO in a superhet radio), but I'm struggling with the detail. | |
| Apr 24, 2017 at 12:40 | comment | added | Buck8pe | Let me see if I get what you're saying, you're suggesting I produce a high frequency signal which I modulate (mix?) with my LF tone. Then I use a variable oscillator that's 500khz to 1.5MHz odd below this high frequency and I transmit the difference frequency. Is that the general idea? | |
| Apr 24, 2017 at 12:06 | history | answered | Marcus Müller | CC BY-SA 3.0 |