10CH Essential Instructions R1.2
2022/11/05
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14. Restrict Master Gain (if applicable)
Master Gain is very useful to allow for
varying wind conditions. But you don’t want to accidentally set it to
very
high gain, which can cause disconcerting oscillation. Hence, once
you’ve set up the receiver pots with the Master
Gain knob or slider about the middle, you may want to limit the maximum available Master Gain.
The simplest way is to use Travel on the Servo Setup menu to limit the throw on channel 8 (Aux3) to, say, 20%
on the high side, (numbers -100, 20).
Another way is to use Channel Assign to change channel 8 (Aux3) to control by a switch, then use Digital Switch
Setup to set it to, say, -20%/0%/10%. Adjust the values as required to give a suitable choice of three settings.
Note that those settings are good for flight but
don’t allow Master Gain to be used to effectively
shut down
stabilization. Thus they thus should probably not be used together with Always-ON.
Using Telemetry
Telemetry is independent of stabilization and can be used with the receiver in stabilized or unstabilized
configuration.
A separate document
“
Telemetry with the Lemon Rx 7- and 10-
Channel Receivers”
to setup and calibrate the Telemetry function. This section just mentions some highlights.
The Lemon Telemetry Receiver sends data on receiver voltage, temperature and RSSI (signal strength)
8
, plus
altitude and vertical speed (vario) information from a built-in barometric sensor. Flight battery data can be
provided by a voltage sensing wire or the optional V/I (voltage and current) sensor; the latter enables the
transmitter to calculate battery capacity-used (mAh). Lemon telemetry is displayed using the existing display
screens and
, where available, the transmitter’s voice capability.
The transmitter can set alarms, in some cases just tones but often voice
announcements. For example, an alarm tone and warning can sound when
the flight pack voltage drops to a preset value or if the models exceeds a
certain height above ground.
9
To utilize this capability on a telemetry-enabled Spektrum
™
transmitter, turn
on the radio and power ON the receiver. Go to Telemetry. You will see a display of parameters potentially
available from the installed sensors.
Run “Auto
-
Config” if they do not appear.
The Settings item allows selection of either metric or US units.
To determine how the various parameters are used by the transmitter, go to
any one of the items and double click. You will then see a screen offering
several options, which vary from one item to another. Typically, the choices
allow maximum and minimum values to be set for purposes of triggering
alarms and voice reports to be made at regular intervals or when a switch is
flipped. Note that not all the parameters displayed on the Telemetry screen will turn out on inspection to be
functional and useful.
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Note that the Lemon RSSI value cannot be directly compared to other signal indicators, such as Spektrum
™
or FrSky
™
RSSI
numbers. Lemon RSSI will read at or close to 100 with the transmitter beside the model and fall as the model moves away.
Even at the minimum reading approaching 20, the signal should be adequate for control.
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Users of Spektrum transmitters may occasionally see warning screens relating to such Spektrum-specific parameters as
fades, frames or holds. Lemon telemetry receivers do not report these parameters and any such warnings are generally
meaningless.
