I-Bus Setup - FlySky Noble NB4 User Manual

To connect to the enhanced receiver:
[SR]: one of the specifications in the servo response speed (PWM frequency is 833 Hz).
[SFR]: one of the specifications in the servo response speed (PWM frequency is 1000 Hz).
[Synchronization with radio frequency]: the digital signal of low frequency is
synchronized with the digital signal of radio frequency.
Note: the conventional servo response speed (PWM frequency) is 50-400 Hz. The delay of
the whole system will be greatly improved when SR and SFR are selected. Make sure that
the adapted servo supports the corresponding frequency. Otherwise, it may cause the
servo not to work properly or even damage the servo.
1. Click [Servos Frequency1] menu. Click [Direction: Digital Servo] or other options to
enter the function setting interface.
2. Click the right side of the corresponding servo response speed according to the actual
state of the adapted receiver. Click to return to the previous level interface.
Click the check box on the right of [Synchronize with RF]. The icon will change to . The
servo response speed of this function will be synchronized to RF after it is checked.
3. If you choose [Custom Frequency], click "+" or "-" to adjust the frequency.

7.7 i-BUS Setup

This function is used to set up the i-BUS expansion module.
The i-BUS function is mainly used for servo expansion. If a cable is too short or the number of servos exceeds the
outputs for the receiver, the i-BUS module provides a convenient option for expansion. When using the i-BUS
receiver, make sure that it is powered separately to ensure that servos have sufficient power.
FS-CEV04 Schematic(FGr4) FS-CEV04 Schematic(FGr4S)
Setup:
1. Turn on the transmitter, enter [SYSTEM], touch [Channel Number Definition], and
select the number of channels to be set (optional 4、6、8 channels, the system
defaults to 8 channels).
2. Go to [RX SET] and bind the transmitter and receiver (see user manual for more
information).
3. Touch [RX Interface Protocol] and select "i-BUS" (if "Sensor" is selected, the i-BUS
port on the receiver cannot be used for channel expansion).
4. Connect the FS-CEV04 to the FGr4/FGr4S receivers "i-BUS out" port.
5. Touch "i-BUS Setup" and select the channel to be assigned, (touch "channel X",
the system display a "Assigning channel X, Press the corresponding key on the serial
BUS receiver to assign") Use the appropriate tool to press the K1, K2, K3 or K4 button
on the FS-CEV04 to assign the selected channel to C1, C2, C3 or C4. If successful, the
transmitter will display: "Channel assigned to interface X / Servo X".
6. Connect the servo to the corresponding port and check if it is working as expected.
7. Repeat the above steps as needed.
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