locked AGC Question


John Carobine
 

I have an FTdx-3000.  What is the recommended AGC setting?

Thanks.  

WB8RFB


Andrew OBrien
 

If you are talking about AGC with modes like FT8, FT4 , the usual recommendation is to experiment with various settings on the rig  and see how they impact varying  receive conditions.  K1JT's 2018 guide (https://www.physics.princeton.edu/pulsar/K1JT/FT8_Operating_Tips.pdf)   says...

"  Use the rig’s AGC or take care to adjust the RF gain control and attenuator whenever there are strong signals on the waterfall.  Overload in the receiver and/or sound card can mess with any digital signal processing in your rig and on the soundcard including, WSJT-X’s decoding and waterfall display.  AGC is the easy option, preferably on a fast setting.  Consider using your rig’s filters too...  "
Andy K3UK
 


John Carobine
 

Thanks Andy.  Appreciate your message and the link to the guide.  

73

WB8RFB

On Saturday, January 4, 2020, 09:54:48 PM CST, Andrew OBrien <k3ukandy@...> wrote:


If you are talking about AGC with modes like FT8, FT4 , the usual recommendation is to experiment with various settings on the rig  and see how they impact varying  receive conditions.  K1JT's 2018 guide (https://www.physics.princeton.edu/pulsar/K1JT/FT8_Operating_Tips.pdf)   says...

"  Use the rig’s AGC or take care to adjust the RF gain control and attenuator whenever there are strong signals on the waterfall.  Overload in the receiver and/or sound card can mess with any digital signal processing in your rig and on the soundcard including, WSJT-X’s decoding and waterfall display.  AGC is the easy option, preferably on a fast setting.  Consider using your rig’s filters too...  "
Andy K3UK

 
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John, K9MM
 

K1JT's 2018 guide (https://www.physics.princeton.edu/pulsar/K1JT/FT8_Operating_Tips.pdf) says...
This document is actually written by ZL2IFB, and version 1.19 (56 pages) at this link is from April 2018.

The latest version, currently 2.27 (79 pages), is always posted at

https://www.g4ifb.com/FT8_Hinson_tips_for_HF_DXers.pdf

Highly recommended reading!

73,

John, K9MM


Andrew OBrien
 

Thanks for the correction John.

Andy

On Jan 5, 2020, at 8:23 AM, John Becker <johnb3030@comcast.net> wrote:



K1JT's 2018 guide (https://www.physics.princeton.edu/pulsar/K1JT/FT8_Operating_Tips.pdf) says...
This document is actually written by ZL2IFB, and version 1.19 (56 pages) at this link is from April 2018.

The latest version, currently 2.27 (79 pages), is always posted at

https://www.g4ifb.com/FT8_Hinson_tips_for_HF_DXers.pdf

Highly recommended reading!

73,

John, K9MM
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