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MS838 User’s Manual 
1.5 LED Indicator / Beeper Sequence 
 
 
 
 
 
 
Indication 
Description 
Beeper LED 
Trigger pull   
No decode 
Wake up 
No Sound  No Light 
Decode High Tone Blue Blink 
Power on  Low Tone, Middle Tone, 
High Tone 
Blue Blink 
Transmission error  Four Low Tones  No Light