[Elecraft] Mildly confused - Assumed filter width and what I see in waterfall do not match
Gary Smith
Gary at doctorgary.net
Wed Jan 7 09:08:57 EST 2009
A day or two ago I mentioned something about an difficulty getting
ESSB to work when using the Elecraft Configuration software. I was
suggested to look at the release notes in the utility.
The utility has no search feature so I highlighted all the text in
the release notes (under Help > K3 Firmware Release Notes) and used
<Ctrl C> to copy the test to a new test file. Starting at the top &
searching for ESSB I found where it was enabled and lower, under
update 2.23 I found the following:
"(1) Make sure the 6 kHz filter is configured correctly for AM
transmit; switch to AM mode, then specify this filter using
CONFIG:FLTX AM. (A future firmware release should allow use of the FM
filter for SSB as well, pending lab tests.)
(2) Locate CONFIG:TX ESSB. Select the desired extended bandwidth for
SSB transmit (3.0 to 4.0 kHz) using VFO A. Then tap `1´ on the keypad
to turn ESSB on/off. When on, the "+" icon in the mode area will turn
on. (If you turn ESSB on/off frequently, you might want to assign the
TX ESSB menu entry to a programmable function switch.)"
I had to set up ESSB separately from the "Edit Crystal Filters" by
doing the above but it indeed works.
73,
Gary
KA1J
> This is what has disturbed me - I have turned on ESSB (set to 4 khz), and I have selected the 6 khz filter, but in no case do I get 4 khz in any mode. specifically, in Data A with DSP set wide open at 4 khz, the waterfall always cuts off at 3500 hz in any software I use. I do not understand why I cannot get the full 4 khz bandwidth. The firmware is at 2.67, DSP at 1.96. Does anyone see 4khz in the waterfall, and with the ability to xmit across the range?
>
>
> --- On Wed, 1/7/09, Joe Subich, W4TV <lists at subich.com> wrote:
>
> > From: Joe Subich, W4TV <lists at subich.com>
> > Subject: RE: [Elecraft] Mildly confused - Assumed filter width and what I see in waterfall do not match
> > To: w7gj at q.com, tpbx at yahoo.com
> > Cc: elecraft at mailman.qth.net
> > Date: Wednesday, January 7, 2009, 12:59 AM
> > > I tried to set the USB filter bandwidth to
> > > use the 6 KHz, but whenever I tried to XMIT I got an
> > error.
> > > Apparently the widest filter permitted for SSB XMIT is
> > 2.7
> > > KHz, and this setting also somehow restricts the
> > > receive filter capability also.
> >
> > The only filters permitted for SSB transmit are 2.7 or 2.8
> > Khz
> > (unless you have enabled ESSB).
> >
> > > I had the same basic idea, but to use the 6 kHz wide
> > flter
> > > for receive in USB mode for use with the
> > "wide" bandwidth
> > > setting of WSJT, to be able to search a wider
> > bandwidth for
> > > callers on EME.
> >
> > The maximum bandwidth permitted in data modes (or USB/LSB)
> > is 4.0 KHz even with a 6 KHz filter. The DSP is limited
> > to a 4200 Hz high frequency cutoff in all modes except CW
> > where the maximum frequency is about 2400 Hz.
> >
> > 73,
> >
> > ... Joe, W4TV
> >
> >
> >
> >
> >
> >
> > > -----Original Message-----
> > > From: elecraft-bounces at mailman.qth.net
> > > [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
> > Lance Collister
> > > Sent: Tuesday, January 06, 2009 10:22 AM
> > > To: tpbx at yahoo.com
> > > Cc: elecraft at mailman.qth.net
> > > Subject: Re: [Elecraft] Mildly confused - Assumed
> > filter
> > > width and what I see in waterfall do not match
> > >
> > >
> > > Thomas Bingenheimer wrote:
> > > > I have been using several programs (Cocoamodem,
> > mostly) to
> > > do PSK31,
> > > > via Data A. Instead of being able to use the full
> > 4khz waterfall
> > > > bandwidth available in, say, Cocoamodem, I have
> > been limited to the
> > > > available width in the only filter I had in the
> > rig, the 2.7 khz
> > > > 5-pole appeared to limit me to about 2.7 khz. So,
> > I added the 6 khz
> > > > filter, set it up for SSB (and enable ESSB, 4.0
> > khz). I now
> > > show 3 khz
> > > > (500 to 3500 hz) in the waterfall. I suspect I
> > have overlooked
> > > > something, but it is not clear to me what. Does
> > anybody
> > > have any idea?
> > > > Thanks!
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > Elecraft
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> > subscriber
> > > to post to
> > > > the list. Subscriber Info (Addr. Change, sub,
> > unsub etc.):
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> > > >
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> > Elecraft web page:
> > > > http://www.elecraft.com
> > > >
> > > >
> > > Hello Tom,
> > >
> > > I had the same basic idea, but to use the 6 kHz wide
> > flter
> > > for receive in USB mode
> > > for use with the "wide" bandwidth setting of
> > WSJT, to be able
> > > to search a wider
> > > bandwidth for callers on EME. I tried to set the USB
> > filter
> > > bandwidth to use the
> > > 6 KHz, but whenever I tried to XMIT I got an error.
> > > Apparently the widest filter
> > > permitted for SSB XMIT is 2.7 KHz, and this setting
> > also
> > > somehow restricts the
> > > receive filter capability also.
> > >
> > > I have not figured it out yet for sure, but it seems
> > that
> > > there currently is no
> > > way to open up the width of the receiver in USB past 4
> > kHz
> > > :-( It would sure be
> > > more flexible if there turns out to be some way to
> > permit
> > > wider filter
> > > possibilities in receive!
> > >
> > > Please let me know if you discover some way to do this
> > - I am
> > > sure there are
> > > others besides us who also would be interested in this
> >
> > > option! TNX and GL! VY
> > > 73, Lance
> > >
> > > --
> > > Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN,
> > > WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT
> > 59834 USA
> > > QTH: DN27UB
> > > TEL: (406) 626-5728 URL:
> > http://www.bigskyspaces.com/w7gj
> > > 2m DXCC #11, 6m DXCC #815
> > >
> > >
> > > _______________________________________________
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> > > Elecraft web page: http://www.elecraft.com
>
>
>
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