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--- hambasics:sections:wavemodulationmath [2026/11/01 07:49] – [More Optional Details] va7fi
+++ hambasics:sections:wavemodulationmath [2026/11/01 07:53] (current) – [Mixer] va7fi
@@ Line 65: / Line 65: @@
   * A DC component of \$c_1 c_2\$
-A mixer is useful to raise or lower the frequency of a signal.  For example, if a signal at 13 Mhz is mixed with a local oscillator signal at 14 MHz, two new signals will be produced (in addition to the original two): one at 1 Mhz and the other at 27 Mhz.  If we want the higher one, we can put the result through a high pass filter, which will discard the unwanted signals.
+A mixer is useful to raise or lower the frequency of a signal.  For example, if a signal at 13 Mhz is mixed with a local oscillator signal at 14 MHz, two new signals will be produced (in addition to the original two): one at 1 Mhz and the other at 27 Mhz.  If we want the higher one, we can put the result through a high pass filter, which will discard the other three signals.
 ====== FM ======