Remote Processing RPC-220 - Manual (Page 11)

SETUP AND OPERATION SECTION 2
Page 2-5
something is not shorting th e output. Wiring is
in SECTION 4, SERIAL PORT PIN OUT.
4. C h e ck th e se r ia l p a r am e te r s o n yo u r PC .
T h ey sh o ul d b e se t t o:
19200 baud
No par ity
8 data bits
1 stop
Make sure you have set the comm unications port on
your PC to the one the VTC-9F is plugged into.
5. Receiving a sign on message and can't enter
character s.
Check U9, pin 14 for at least -6 volts with the serial
cable connected to the PC . W hen it is near 0 volts,
the terminal or PC' s Tx line is not connected. When
you press a character on the terminal or P C, you
should see the voltage go positive on the
oscilloscope.
If all of this fails, call technical sup port listed in
SECT ION 1.