Fred,
"Real" RS-232 drivers use +/- 15 volts rather than +/-5 or even +/- 12
volts - the maximum open circuit voltage is +/- 25 volts.
The key is that at the receiver end, the levels must be +/-3 volts or
greater. Both cable resistance and cable capacitance will reduce the
levels at the end of a long run.
73,
Don W3FPR
On 1/21/2016 5:44 PM, Fred Jensen wrote:
2. I should be able to make RS-232 work. I personally know that many
so-called RS-232 drivers use +/-5 V rather than +/-12 V. This is a
problem I can solve.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
