number of channels sent to the receiver will improve the responsiveness, while
decreasing the bi-directional bandwidth and lowering the update rate to its
minimum setting will greatly increase the range at which telemetry can be received.
At the bottom of the page, the approximate update rate (hertz) is displayed, along
with the radio modem’s uplink and downlink data rates (bytes per second). These
values can be used to gauge the effect that changing the settings will have.
In real-world usage situations, any gain to be had by lowering the number of
transmitted channels or bi-dir bandwidth will be marginal, and may result in
compromised performance. Only lower these settings below ‘normal’ in cases where
extreme range and link stability are required.
NOTE: MavLink telemetry streams require a relatively high data rate.
Without altering the configuration of the flight controller, MavLink
typically only works with ‘bidir bandwidth’ set to ‘High’ and ‘RF
preference’ set to ‘Fastest update-rate’.
RF Band: [to be added]
Use bi-dir: Enables or disables bi-directional communication between the
transmitter and receiver. Disabling this setting will disable all telemetry and radio-
modem functionality.
Trans. channels: Specifies how many channels to transmit to the receiver.
Bidir bandwidth: Specifies how much bandwidth to allocate to bi-directional
communication. Maximum value is required for stable MavLink.
RF preference: Specifies how rapidly to update the channel positions.
Use narrowband: Effectively uses half the normal bandwidth, allowing much tighter
internal RF filters for a cleaner signal.
3.1.5 Alarms and Sounds
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