Hi Some of them need a pair of control lines driven in opposite states to work well. Others need the control lines driven to a + voltage. Most are unhappy with < 5V signaling. Without a hammer and a microscope it’s generally a bit tough to figure out what the constraints are :)
Bob > On May 30, 2017, at 1:20 PM, Mark Sims <[email protected]> wrote: > > While playing with the RFTG-m GPSO I tried using a couple of RS-422 to RS-232 > converters. These converters can be externally powered or "self-powered" by > the RS-232 signals. > > Both units worked fine as long as the RFTG was only sending the 22 character > ASCII time code message once per second. But when the RFTG was sending > binary data along with the time code message they flaked out. Apparently the > converters power generator can't generate enough power when they are handling > a lot of data. > > One of the converters I tried was made by Hexin. The other was a no-name > Chinese mystery unit. Also some USB serial port dongles can't properly power > the converters no matter what data they are processing. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
