I don't know if I am missing something but when listening in Stereo Diversity mode on my 6600M (RX1 ANT1 in left channel, RX2 ANT2 in right channel) and want to adjust
the AF/volume level it only controls RX1?
It there a way to lock the RX 1&2 volume controls together so I can adjust both slices at the same time?
Would also be nice
if I could lock together the AGC-T controls for both slices as well.
Well after further investigation it looks like this is not possible at this time. I would like to submit this for a future SSDR update.
While I have it my mind I will describe what I think the best way to implement this idea or at least what I think might work.
I think there could be 3 Stereo Diversity Tracking Modes when you click the DIV button:
1:(IND) Independent Mode. This is the way it currently works now. When you click DIV the Volume & AGC-T controls for both slices are adjusted separately and manually.
2:(REL) Relative Mode. When you select this mode it would lock both volume & AGC-T controls in their current positions and when you adjust them they will both move “relative” to their current positions.
3:(ABS) Absolute Mode. In this mode what ever slice A settings are (volume, AGC-T) they are mirrored or duplicated in slice B.
I’m not sure how FRS would do this but maybe just clicking the “DIV” button multiple times could toggle between each mode and it should also have persistence so it remembers the last mode you selected so the next time you click the DIV button it goes right back to the last mode you selected (IND, REL, ABS).
Now if we could not have all these modes and had to pick just one I think #2 “Relative Mode” would be the best option for most because it allows the user to set their volume & AGC-T to compensate for the differences in gain between the two different antennas but still be able to control them together.
One of the reasons I bought a 6600M was to take advantage of the 2-SCU’s and have Stereo Diversity Reception capabilities. When chasing DX using DIV (diversity) I find I have to constantly go back and fourth making adjustments witch really slows things down and is pain in the butt, so having this ability to lock the controls together would really improve and speed up workflow.
Another thing I don't hear many Flex users talk about is how amazing the 6000 series radios are for SWL (short wave listening). I use my Flex all the time to listen to SW radio broadcasts from all over the world and it sure would be nice to have this feature added for even more SWL Fun! ;)
HAPPY NEW YEAR!
Diversity reception is about combining signals not separating signals...
First is to consider how the signal is being received at the antenna system. Hence based on antenna system you can have spatial diversity where the two antenna are spaced a wave length apart and of the same polarization. The second is polarization diversity, where two antenna are of different polarization ( one vertical and one horizontal).
Some people like to operate diversity by having volume and agct set same on each SCU/ant combo but with one scu sent to left ear and other sent to right ear....
This is not combining but is separating...bad idea for optimal diversity reception and reduced human cognitive loading.
I personally dont agree with this as this causes the signal to vary from ear to ear. This technique causes too much cognitive processing to "follow" the sound are it travels spatially within your head from ear to ear. ) The cocktail party effect of psycho-acoustics is in effect in this mode and is the high cognitive load...
Applying combining technique.
A better method is to have both scu's outpout (volume) set to center rather than full left and full right as in above setup. and to he same level. Since they will be inphase any variation in volume between signal received from one scu/ant will be compensate by the other scu/ant..and no noticeable change in volume will occur.....no cognitive processing required and you get to hear the best signal.
Based on this description of diversity reception, i see no reason to change how flex has setup the controls.
my two cents based on human factors and engineering.
people like to operate diversity by having volume and agct set same
on each SCU/ant combo but with one scu sent to left ear and other
sent to right ear....
This is not combining but is separating"
That's why it's called "<<STEREO DIVERSITY>>" it's supposed to be separate;)
There are many aspects and ways to take advantage and use Diversity Reception and Stereo Diversity is just one of those ways.
If you read through the original post you will see that one of the very modes that I mention (#1 on the list) is actually the way the DIV button works as of right now, that way folks like yourself can continue to use DIV just as you always have.
"I personally dont agree with this as this causes the signal to vary from ear to ear. This technique causes too much cognitive processing to "follow" the sound are it travels spatially within your head from ear to ear. ) The cocktail party effect of psycho-acoustics is in effect in this mode and is the high cognitive load..."
Fortunately for me I have no trouble and can handle "the high cognitive load” ;)
was just suggesting the additional control over the slice Vol and
agc-t levels to add more flexibility for
Hope this helps
just trying to expand your horizons of how people perceive sound and how it could improve ham radio operations
as a tidbit of info..
Besides the cognitive load there is also focus switching which includes decision making and cause context switching to occur. In the case of stereo diversity is the decision to prioritize which ear to focus attention. A lot of brain power just to keep tracking the signal which could be used to decode (voice or cw).
A lot of this happens subconsciously. However, when context switching happens very frequently like in a signal with a high QSB rate you reaction times slow down.
i would recommend to do some reading and research on the web for Binaural Audio...which is the ability to create 3D sound fields from just two sources (like a headset)
the 'binaural' used by flex and even by tentec at one time used the freq ( cw mode only)to create pseudo 3D sound field "spatially" layed out but the sound field is only perceived within your head...in fact across a region in your head from the left ear to the right ear
Real binaural audio can create out of head perceptions of sound.
just like in a movie theater or even better ...real life ;-)
i would be glad to discuss this topic with you any time...
just as a note on my background with the topic
anyone at FLEX Radio have any thoughts on this suggestion?
I am very happy with my 6600M and Maestro and I can obviously live with the way the slice controls work in Diversity now but it would be nice to have the extra slice control in diversity if possible.
HAPPY NEW YEAR! 2019