Led Status Display - Conrad REELY SKY 450 ARF QC09 Notice D'emploi

g) LED Status Display
The composite signal converter has a green and a
R17
LED2
C7
LED1
R5 R1 R9
red LED for status display.
TP3
TP7
A green LED („LED1") indicates that the electronics
TP8
are in normal operation. This means that servo
Rot
R18 LED1
signals can be measured, and if required a
TP4
composite signal can be generated. When the
Rot
LED2
greed LED goes out, there is a basic interference
R21
R2 R10
R6
in the electronics.
U1
TP2
A red LED („LED2") shows that no servo signals
are present. The reasons fort his may be reception
TP1
interference, lack of power supply to the receiver ,
switched-off transmitter of contact errors in the
C3
connection lines.
C
C4
Q1
C2
Figure 9
Behaviour in case of reception interferences
The composite signal converter measures the signal quality and thus also recognises reception interferences. Since
channels 1 - 4 are mainly used for general control of models, they are specifically described.
Interferences on channels 1 - 4
For these channels, verification of a valid pulse width (between 1 and 2 ms) is performed. If an error is recognised, the
composite signal is generated with the last valid value. When the error rate exceeds the measure for proper reception,
the composite signal converter does not output any composite signal anymore and activates the red LED. Now the
reception problem can be recognised by the downstream logic and no reception problems are concealed. If the input
signal is valid again, the red LED goes out and a composite signal is generated.
Interferences on channels 5 - 8
If the reception interference only acts on channels 5 - 8, a composite signal continues to be generated for channels
1 - 4 and channels 5 - 8 are output with an invalid pulse length. Thus, it is possible to continue to control the model, but
the interference can be recognised by a downstream logic at channels 5 - 8. When the input signal is valid again, a
regular composite signal is output.
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