[TenTec] Bandwidth, Mode, Storage of values

[Kim Elmore]

Having just read John Henry's excellent discussion, I can see that I 
stumbled upon part of this purely by accident. I understand both the 
behavior and the philosophy behind it, now!

73,

Kim Elmore
N5OP

At 09:46 AM 6/18/2010, you wrote:
>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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