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APS4 Error LED Meaning

Written by Gary Brindley

Updated at December 22nd, 2025

Table of Contents

​Question: Answer:

​Question: 

What triggers the red ERROR LED?
 

Answer: 

The red LED appears if the antenna input voltage falls below 2 V or is short‑circuited.

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led significance aps4 error

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Table of Contents

​Question: Answer:

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