Pacific Research Solutions RI-1 - Manual (Page 73)

Pacific Research Solutions RI-1 and PE-1 User Manual
Page 67
PE-1 CIRCUIT BOARD ASSEMBLY
PE-1 CONFIGURATION JUMPERS
JP4 – TX Modulation Select:
If you are interfacing directly to a true FM type modulator, you will want to disable the controller’s transmitter emphasis stage.
This is accomplished with a jumper (JP-4) on the circuit board. See the figure to the right. Pin 3 is located in the lower corner
of the board. For modulators that are true FM and without emphasis, place jumper on pins 2 and 3. For all other types of
modulators and audio interfaces, including VoIP, you will want to place the jumper on pins 1 and 2.