Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?
SmartSDR v3.10.10 and the SmartSDR v3.10.10 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
SmartSDR v3.10.10 and the SmartSDR v3.10.10 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
PRE AMP CRAZY FLEX3000
FranciscoT
Member
I'm using flex3000 in amerintron als500 CW and my PRE2 dont receive good.... attn-98 off-107 pre1-119 pre2 -127 im confuse


1
Comments
-
Francisco
It's working as it should.
Your measuring noise floor readings. Your highest noise floor reading was with the attenuator enabled 98dBm, your lowest reading was with preamp 2, -127dBm.
Your noise level dropped 29dBm.
Any actual signal would/should have remained constant.
When Off is selected, a -102dBm signal would be 5dBm out of the noise.
With the attenuator enabled the same signal would be buried 4dBm in the noise, you might have trouble hearing that signal at all.
With preamp 1 enabled it would be 17dBm above the noise floor, and easier to copy.
With preamp 2 enabled the signal would be 25dBm above the noise and even louder.
Increased preamp gain will raise signals out of the noise, and lower the noise floor.
Signals will appear to be taller, standing on the noise floor in the panadapter with more preamp gain.
73, Jay - NO5J0
Leave a Comment
Categories
- All Categories
- 352 Community Topics
- 2.1K New Ideas
- 615 The Flea Market
- 8K Software
- 3 SmartSDR+
- 6.3K SmartSDR for Windows
- 173 SmartSDR for Maestro and M models
- 412 SmartSDR for Mac
- 267 SmartSDR for iOS
- 250 SmartSDR CAT
- 187 DAX
- 375 SmartSDR API
- 9.2K Radios and Accessories
- 22 Aurora
- 212 FLEX-8000 Signature Series
- 7.1K FLEX-6000 Signature Series
- 922 Maestro
- 53 FlexControl
- 860 FLEX Series (Legacy) Radios
- 894 Genius Products
- 455 Power Genius XL Amplifier
- 323 Tuner Genius XL
- 116 Antenna Genius
- 284 Shack Infrastructure
- 200 Networking
- 444 Remote Operation (SmartLink)
- 138 Contesting
- 756 Peripherals & Station Integration
- 139 Amateur Radio Interests
- 974 Third-Party Software