# Thoughts on optimizing gain

**URL:** <https://discussions.flightaware.com/t/thoughts-on-optimizing-gain/44482>\
**Category:** ADS-B Flight Tracking\
**Created:** [January 9, 2019, 8:11pm UTC](https://discussions.flightaware.com/t/thoughts-on-optimizing-gain/44482 "2019-01-09T20:11:23Z")\
**Posts on this page:** 1\
**Showing post:** 80

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**Author:** ![ve4gls](https://sea1.discourse-cdn.com/flex019/user_avatar/discussions.flightaware.com/ve4gls/32/117792_2.png) [@ve4gls](https://discussions.flightaware.com/u/ve4gls)\
**Post date:** [January 24, 2019, 5:28pm UTC](https://discussions.flightaware.com/t/thoughts-on-optimizing-gain/44482/80 "2019-01-24T17:28:36Z")

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Tried the %strong signal query before, but when I send the command I get:  
“Percentage of strong messages: 103.368”

a) how can it read higher than 100%?  
b) should I be adjusting gain to less than current setting (10 for AGC)?

I am using a new ceramic filter/preamp at the antenna (100ft feedline run). Thought setting the gain to 10, AGC would pick the best gain automatically. Maybe this is not the way it works.  
-G.

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