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Title: Optimod Post by: w2tgr on March 02, 2019, 11:39:18 AM Could someone tell me the difference in the Optimod FM vs AM.. I am wondering if the FM model could be used on AM
Title: Re: Optimod Post by: K8DI on March 02, 2019, 04:00:27 PM Short version: FM includes the stereo encoder, has a pre-emphasis network. AM does not. Unless it's rather old, AM probably has NRSC filtering. FM does not. Multiband compression bands are different due to the bandwidth of broadcast FM vs AM (no need to compress/limit 6-15kHz on an AM if you're just going to filter it off).
Can you use it? Sure. You need to disable the 75uS preemphasis, turn off the stereo, and add your own LPF/NRSC type filter on the output. Ed Title: Re: Optimod Post by: K1JJ on March 02, 2019, 06:06:20 PM "Ed, K8DI (fmr. KB8TWH) " AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Boy, did you get rid of a giant gorilla on your back... congrats, Ed - ;D Tom, K1JJ |