> The Baudot thing sure brings back some memories. I still recall hooking > teletype's up thru KW-7 boxes, and performing ryryryryryryryryr test. > > I don't recall enough of the specifics, but it was either > > Y = 10101 > R = 01010 > > or reversed.
Ah yes... One of the classic tests for problems in the receiver and comms link, but not the only one. A system with poor low frequency response (for example) might handle alternating mark and space correctly but fall down on things like 11110 I have a test message generator that can sent that, various alternating signals (without start and stop bits), user-entered characters (on a row of switches) and so on. And distort them by lengthening and shortening pulses to check how well the receiving device copes with mangled signals. I also have the distortion measuring set, a special oscilloscope to check for distorted signals, test relays for contact bounce, bias and transit time, etc. I really must get my Creed 7E and 444 running again... -tony
