Nobody told me there would be math.   I think I understand, but 
probably a bit much for my style of operation.  Thanks for explaining.

73, Steve KW3A

On 3/9/2014 3:09 PM, Lloyd Rasmussen wrote:
> On the Ft950, if you set the CW bandwidth to 400 Hz or more, the receive
> passband extends downward by 150 hZ from the offset, and increasing the
> bandwidth raises the upper frequency limit.  Suppose your sidetone/offset is
> on 500 Hz and you have set a 700 hZ CW bandwidth (the band is not very
> crowded and you are scanning for signals).  Under that condition, you will
> hear signals at pitches from 350 to 1050 hZ.  If you switch from CW to CW
> Reverse, the signals you didn't hear (below 350 hZ pitch) are now above 650
> Hz and you can hear them.  I don't use CW reverse for this purpose, though;
> it's too confusing.
> I always like to tune a CW band from high pitch to low.  If I leave the CW
> mode in its normal upper sideband position, this means that I will always be
> tuning from the low to the high end of the band.  If I want to keep my habit
> of tuning from higher to lower pitch, but want to tune the CW band segment
> downward, I would use CW Reverse.  This would also mean that I adjust the
> main tuning knob counter-clockwise instead of clockwise, which would be
> consistent with the tuning direction of my Drake C-line, which was on lower
> sideband for its CW operation.
> So this is a feature that only some people will likely use.
> 73,
>
>
> Lloyd Rasmussen, W3IUU, Kensington, MD
> http://lras.home.sprynet.com
> -----Original Message-----
> From: Steve Forst
> Sent: Sunday, March 09, 2014 2:10 PM
> To: [log in to unmask]
> Subject: Re: Auto Zero Beat With Ts590
>
> Tom,
>
> I'm no cw  guy, but use this feature all the time and  have this
> function set to one of my extra pf keys for easier use. I don't recall
> the limits offhand, but both  filter bandwidth and shift need to be
> below certain values i.e. if the filter is too wide or the  pitch too
> high, the feature won't work.
>
> I think this feature was a 2 button press on the TS-2000, but  only a
> single press for the 590.
>
> I have to admit I never understood what the cw reverse was all  about,
> but hopefully I'll learn something.
>
> 73, Steve KW3A
> On 3/9/2014 12:51 PM, Steve Dresser wrote:
>> Tom,
>>
>> It's quite simple; just press the AGC Off button and wait for a few
>> seconds
>> while the radio tunes itself.  That's it.
>>
>> Steve
>>
>> ----- Original Message -----
>> From: "Tom Behler" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Sunday, March 09, 2014 12:29
>> Subject: Auto Zero Beat With Ts590
>>
>>
>>> Hi, again. All.
>>>
>>> =20
>>>
>>> So, here is what the TS590 manual says about activating the auto =
>>> zero-beat
>>> function.  I=92m usually pretty good at figuring out these things, but =
>>> the
>>> instructions are a bit unclear to me.
>>>
>>> =20
>>>
>>> If anyone can help decode them, I=92d appreciate that.
>>>
>>> =20
>>>
>>> Tom Behler: KB8TYJ
>>>
>>> =20
>>>
>>> =20
>>>
>>> AUTO ZERO-BEAT
>>>
>>> =20
>>>
>>> Use Auto Zero-beat before transmitting to tune in a CW station. Auto
>>> Zero-beat
>>>
>>> automatically and exactly matches your transmit frequency with the =
>>> station
>>> you
>>>
>>> are receiving. Neglecting to do this will reduce your chances of being =
>>> heard
>>> by
>>>
>>> the other station.
>>>
>>> =20
>>>
>>> 1 Tune to the CW signal using the Tuning control.
>>>
>>> =20
>>>
>>> 2 Press [CW T. (AGC OFF)] to start Auto Zero-beat while CW is selected =
>>> for
>>> the
>>>
>>> operating mode.
>>>
>>> =20
>>>
>>> =95  "CW TUNE" appears.
>>>
>>> =20
>>>
>>> =95 Your reception frequency automatically changes so that the pitch =
>>> (tone) of
>>>
>>> the received signal exactly matches the TX sidetone/ RX pitch frequency =
>>> that
>>>
>>> you have selected. Refer to "TX SIDETONE/ RX PITCH FREQUENCY" {below}.
>>>
>>> =20
>>>
>>> =95 When matching is completed, "CW TUNE" disappears.
>>>
>>> =20
>>>
>>> =95 If matching is unsuccessful, the previous frequency is restored.
>>>
>>> =20
>>>
>>> 3 To quit Auto Zero-beat, press [CW T. (AGC OFF)] or [CLR].
>>>
>>> =20
>>>
>>> Note:
>>>
>>> =20
>>>
>>> ? When using Auto Zero-beat, the matching error is normally within =B15 =
>>> Hz.
>>>
>>> =20
>>>
>>
>>
>>
>
>
>