Welcome to the new FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR, Power Genius, Tuner Genius and Antenna Genius Software?
SmartSDR v3.7.4 and the SmartSDR v3.7.4 Release Notes | SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.8.8 and the Power Genius XL Release Notes v3.8.8
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
SmartSDR v3.7.4 and the SmartSDR v3.7.4 Release Notes | SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.8.8 and the Power Genius XL Release Notes v3.8.8
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
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.
Does the 6500 running V.2.6.1 have an RX Attenuator function/setting ??
Options
CHRIS
Member
0
Answers
-
Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator adminOptionsYes
Details are in the SmartSDR manual.
35.4.2 Preamplifier / Attenuator Block
The preamplifier / attenuator block can raise or reduce signals before they are sampled in the ADC block. The overload limit of the SCU is reduced by any gain that is added by the preamplifier. For example, if 10dB of gain is selected using the preamplifier selection under the antenna controls in the panadapter, this 10dB addition must be factored into the overload calculations. The same holds for other amplification levels: if +20dB or +30dB are selected, the respective value must be added to overload calculations. You should only use pre-amplification when necessary and only what is required to raise the noise level in the receiver by 8-10dB over the noise level when the antenna is disconnected.
The preamplifier has protection circuitry to prevent damage above levels of +10dBm. This protection circuitry will cause distortion in received signals if the level exceeds +10dBm. For this reason, pre-amplification should not be used when the input signal level will meet or exceed +10dBm. When performing all testing of a full duplex configuration, it is highly recommended that the preamplifier be disengaged until it can be determined that the power level from the transmitter will not reach +10dBm in any operating scenario.
1
Leave a Comment
Categories
- All Categories
- 246 Community Topics
- 2.1K New Ideas
- 489 The Flea Market
- 7.1K Software
- 5.9K SmartSDR for Windows
- 134 SmartSDR for Maestro and M models
- 331 SmartSDR for Mac
- 243 SmartSDR for iOS
- 223 SmartSDR CAT
- 163 DAX
- 348 SmartSDR API
- 8.6K Radios and Accessories
- 6.9K FLEX-6000 Signature Series
- 766 Maestro
- 41 FlexControl
- 836 FLEX Series (Legacy) Radios
- 733 Genius Products
- 393 Power Genius XL Amplifier
- 255 Tuner Genius XL
- 85 Antenna Genius
- 229 Shack Infrastructure
- 153 Networking
- 370 Remote Operation (SmartLink)
- 120 Contesting
- 583 Peripherals & Station Integration
- 115 Amateur Radio Interests
- 813 Third-Party Software