# Do I Need A Filter?

**URL:** https://discussions.flightaware.com/t/do-i-need-a-filter/27833
**Category:** ADS-B Flight Tracking
**Created:** [November 9, 2017, 6:31pm UTC](https://discussions.flightaware.com/t/do-i-need-a-filter/27833 "2017-11-09T18:31:05Z")
**Posts on this page:** 1
**Showing post:** 677

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### Author: ![foxhunter](https://sea1.discourse-cdn.com/flex019/user_avatar/discussions.flightaware.com/foxhunter/32/113733_2.png) [@foxhunter](https://discussions.flightaware.com/u/foxhunter)
#### Post date: [May 16, 2020, 5:44pm UTC](https://discussions.flightaware.com/t/do-i-need-a-filter/27833/677 "2020-05-16T17:44:54Z")

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Yes, i have another system. But with a different antenna. heading to the blind spot where my roof covers the reception.  
Fact is that setting the gain to 49.6 was simply overloading the signal before using the filter.

I am not that critical on that. I have a good feeling and it was worth the 20 Euro.  
Beside that the GSM signals went down clearly.

I ran the test as mentioned in the first post again, this time with filter.

Results compared. At least the filter does what it should do 🙂

 ![image](https://us1.discourse-cdn.com/flex019/uploads/flightaware/original/3X/4/8/4864d2e3fbf309f58a047e39cb0b6c20c1c0557c.png)

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