Transistor Bias Voltage (PTT) Switching options Selectable by Jumper:
1. PTT is switched ON by connecting PTT pin to the ground.
2. PTT is switched ON by applying +3....+12V to PTT pin
3. PTT is switched ON simultaneously with Power Supply Voltage.
Directional Coupler Voltages:
1. FWD Voltage Input 0.5V typ. @ 0.5W input power
2. FWD Voltage Output 3.5V typ. @ 20W Output power
3. REF Voltage Output - reflected wave , can be used to calculate estimated output SWR