When I was using high quality alkaline batteries with about 1/2 their life left
(according to the battery meter on the Ogo), I printed many files from the Ogo
to the PC and then to a laserjet printer. At 19200 baud, the graphics and text
were just a garbled mess. At 9600 baud, it was mostly clear except for some
areas of noise.
When I replaced the alkalines with fresh ones reading full on the meter and
attempted the same printing transfer process, the results were better. The
noise at 19200 baud was lower but still not acceptable. The 9600 baud result
gave near perfect output.
When I used the AC adaptor, I could use 19200 baud and 9600 baud with 99.99%
accuracy. At 19200 baud, only a couple noise characters in a 2.6 mb print file
(30K on the OmniGo) were noticed. I also printed many 900K spreadsheet print
files (20K on the OmniGo) and found one or two noise characters in each output.
Does this have to do with the serial port? Are other applications that use the
serial port in jeopardy of noise unless a good power source is available?
Anyone have any input or comments?
Thanks,
Jeff Hinman
ust941@edcca4.bgl.ca.boeing.com