There is a socket for an external microphone on the back "EXT MIC". There is also a jumper inside which supplies 3.3v bias for condenser mics like the internal one. Take it off for a dynamic mic.
Don - W7DMR On Tue, Feb 05, 2019 at 09:32:13AM -0800, K6DLC wrote: > Does anyone have an idea on how to interface a handheld/desk microphone to > use the sm1000? > > > On 2/4/2019 10:24 AM, Don wrote: > > I am currently working on getting the 700D mode to work with the SM1000. > > It is not certain that this will be possible because of the memory > > needed. > > > > Also Dave is looking at new compression modes with different performance > > and bandwidths. > > > > I see the current firmware as best suited for experimenting and developing > > on a desktop PC. To make a small, low cost embedded version one would > > likely want to do a major re-write of the code. Lacking that, I suggest > > that you look at processor versions that have a lot more memory so that > > it will support future modes. The STM32F7 family looks interesting. > > > > Don Reid - W7DMR > > > > On Mon, Feb 04, 2019 at 05:42:15PM +0000, Richard wrote: > > > Hi All, > > > > > > I hear this mailing list covers the SM1000 hardware implementation. > > > > > > I am thinking of (well, I've started) designing a "module" version > > > designed > > > to plug into a rig. The idea being that if you're building a radio you can > > > include a small plug-in module on pin headers that adds digital voice. > > > Because it lives inside other equipment it can be smaller and simpler than > > > the SM1000, just keeping the core functionality without the isolated > > > interfaces, external enclosure, etc. Essentially it's a stripped-down > > > SM1000 in a smaller physical form factor. I've not got as far as a draft > > > placement but I am anticipating something on the order of 50 mm square. > > > > > > Is anyone else interested in this? Any comments or suggestions? > > > > > > If no-one else wants it I will probably build a few for myself anyway. > > > Software is not my thing so unless there's a good reason otherwise I > > > expect > > > it to run the standard SM1000 firmware. > > > > > > A couple of things I have not been able to work out, 1. what's the > > > not-fitted EEPROM intended for? and 2. what is the USB OTG used for? It > > > looks like device mode is used for updates but in what situation would > > > host > > > mode be used? > > > > > > Richard > > > M1FJA > > > > > _______________________________________________ > > > Freetel-codec2 mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > > > > _______________________________________________ > > Freetel-codec2 mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > > -- > ----------------------------------------------- > Daniel Curry > > California American Legion Amateur Radio > Area 2 Commission and California Department Chair. > > Trustee for Palo Alto Veterans hospital KI6UIG > > US Air Force Veteran > PGP: AD5A 96DC 7556 A020 B8E7 0E4D 5D5E 9BA5 C83E 8C92 > > > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
