This document is an instruction manual for the Futaba FP-4NBP (PCM/FM) and FP-4NBF (FM only) 4-channel digital proportional radio control systems designed for aircraft. The system includes a transmitter with two sticks, a receiver compatible with FP-R124DP or FP-R127DF models, and servos such as the FP-S148.
| Channels | 4 channels |
|---|---|
| Modulation (FP-4NBP) | FM-PCM |
| Modulation (FP-4NBF) | FM |
| Transmitter Power Requirement | 9.6V Nicd battery pack |
| Receiver Power Requirement | 4.8V Nicd battery pack |
| Operating Angle | Rotary system, one side 45° or greater |
The F/S function holds all servos in their current position except for throttle, which moves to a low side when the receiver loses signal.
No, changing frequency from one band (e.g., 72MHz) to another (e.g., 50MHz) is not possible.
The system requires a Nicd battery pack for both the transmitter and receiver/servos.