[TenTec] Bandwidth, Mode, Storage of values

[Ron Castro]

John:

That's a great explanation of how the memory system works.  I wonder if it 
would be possible to have that information permanently posted on the TT 
website in the "566 Downloads" section?

            Ron N6IE
       www.N6IE.com

----- Original Message ----- 
From: "Henry, John" <jhenry at tentec.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Friday, June 18, 2010 7:46 AM
Subject: [TenTec] Bandwidth, Mode, Storage of values


> I've been watching the discussion on bandwidth getting saved, not
> getting saved, and can provide a few comments that might show why
> certain people are saying that these are working fine, and that others
> say they are broken.
>
> Two things to keep in mind.....
> 1 - Band Registers are only stored when the band or band register changes.
> 2 - Mode-Specific BW registers are only stored when the MODE is changed.
>
> When powering back on, the last bandstack that the rig was on will be 
> recalled.
> This means that the bandwidth for the mode used on that bandstack will
> be recalled.
> For example, do the following:
> Turn on the rig.
> Make sure that the Main RX LED is lit (if not, press Main RX button)
> Go to 20Mtrs Bandstack A register by pressing 20.
> Set the main frequency to 14.250
> Set the mode to USB
> Set the BW to 2410
> Now press 20 continually to get back around to 20mtrs Bandstack A.
> You will notice that the mode and the BW were whatever they were on B,
> C, D (in my test case, after a master reset, they will all show
> 14.250, USB, BW=3000)
> When you get back around to 20mtrs Bandstack A the values revert to
> 14.250, USB, BW=2410.
> Power off the rig.
> Power it back on.
> It will show 14.250, USB, BW=2410 on 20mtrs Bandstack A. (not the default 
> 3000)
> Now, change BW to 2390
> Power off the rig
> Power it back on.
> You will notice that it still reverts to 14.250, USB, BW=2410 on
> 20mtrs Bandstack A.
> The reason is the last time the 20mtrs Bandstack A was saved, the USB
> BW was 2410.
> Change Mode to UCW.
> Change the bandwidth to 900
> Now press 20 continually to get back around to 20mtrs Bandstack A.
> You will notice that the mode and the BW were whatever they were on B,
> C, D (for me, or after a master reset, they will all show 14.250, USB,
> BW=3000)
> When you get back around to 20mtrs Bandstack A the values revert to
> 14.250, UCW, BW=900.
> Power off the rig
> Power it back on.
> My rig came back up with 20mtrs Bandstack A set at 14.250, UCW, BW=900..
> So we have seen that bandstack changes can cause the bandstack data to
> get stored.
> Changing from 20mtrs Bandstack A to 40mtrs Bandstack X will do the same.
> So a quick way to save the bandstack settings before you power off is
> to "go somewhere else then back". This could be simply pressing a
> different band's button, then back to the one you are on, or by
> cycling through the bandstack you are on getting back to the A/B/C/D
> you want to power up on.
> BW is set to something you typically use in a bandstack register, and
> if you change it for a given band condition or operating instance that
> requires a tighter bandwidth, typically you will want to revert to the
> normal value you usually use, not the adjusted value. That is why BW
> is not stored just because you change it. If you want it remembered as
> your bandwidth for that bandstack register for that band, then "go
> somewhere else then back.".
>
> User memories, when recalled, use the same philosophy.
> They will remember the band that you are on, and the band stack
> setting, which includes the mode. The last mode for that bandstack
> that is saved also means the last BW for that bandstack you were on.
> So if you store into USER 1 when you are at 14.250, USB, 2500,
> then change BW to 2800, pressing USER 1 will revert to 2500. because
> 2500 was what was stored for that bandstack, not 2800.
> You can see this easier if you run a quick test where you set band
> stack A to USB 2490, bandstack B to USB 3020, bandstack C to USB 3030,
> and bandstack D to USB 3040.
> Go back to bandstack A, press/hold User 1.
> then go to B, press User 1.
> You will see the BW will end up going to 3020, because that was the
> last bw USB was at when on bandstack B.
> You will see similar when you go to C with 3030 and D with 3040.
> User  recalls are based on the freq/mode for the bandstack that you are 
> on.
> Can be confusing, but if you keep that concept in mind, then you can
> get a lot of quick change flexibility out of using the different
> bandstacks.
>
> If you simply go to a mode, then change the bandwidth, power off, back
> on, it will not remember the new bandwidth value, but it will recall
> the last bandwidth value stored in that bandstack for that mode.
>
> If you have the Sub RX LED lit, then things can get more complicated.
> That is another email at another day.....
>
> So, for me, I try to keep it simple.
> If I want to make sure things are remembered, I "go someplace else
> then come back".
> If I want to narrow the bw to pick someone out, but don't care if it
> is remembered, then just power off.
>
> Hope that helps,
>
> Thanks,
> John Henry
> TenTec Engineering
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