The control specification for RS232 Control can be found here:

RS232 control specification.pdf
Note that this covers all units - although your unit may not have the
full range of features or adjustments in it.

NB. See RS232 Control over the C2-4000 & C2-5000 Universal Scalers
for details of how to control the C2-4000 & C2-5000 series, as their
protocol is different.

We would appreciate any feedback regarding this control method &
document, via this support system.

If you have problems, see RS232 connection / cable

Also see: C2-160, C2-260, C2-1000, C2-2000, C2-3000, 1T-C2, C2-7000
Series Windows Control Panel software (WCP)