[RC232] What type of modulation type in the RC1190-RC232? RC1190-RC232 use GFSK modulation. Last Update: August 8, 2017 December 13, 2016 1948 RC232 Q&A Related Knowledge Base Posts -[RC232] Using a switching power supply from 12V to 3.3V, switching at 300 kHz, and a 1% ripple output; do I need extra filtering?[RC232] Do you have an Unlimited modular approval FCC / IC + EN Test results?[RC232] We are trying to configure our modems RC2500HP 201545H to use them at a data rate of 250kbit/s, following the datasheet rev 1.22. However the communication fails at this RF rate. Back to 100 kbit/s the communication is works again.