[TenTec] Bandwidth, Mode, Storage of values

[Rsoifer at aol.com]

John,
 
Yes, it does help.  Thanks for the explanation.
 
73 Ray W2RS
 
 
In a message dated 6/18/2010 2:48:20 P.M. GMT Standard Time,  
jhenry at tentec.com writes:

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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