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K3 TX DATA EQ <was> Re: K3 RX AUDIO

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k5oai

K3 TX DATA EQ <was> Re: K3 RX AUDIO

(reference quote from Joe W4TV below)

while trying to set up my K3's SSB EQ in the way Joe had mentioned,
I happened on an interesting fact. What ever you set the SSB RX EQ for,
sets the TX DATA for (Data Audio) as well.

does this mean if I want to have a flat RX EQ when using Data Audio for WSJT-X
which runs both JT65 & JT9-1, I would need to reset the SSB EQ to flat for data?
Then set it back like below when I want to go back to SSB?

Do we need another separate EQ setting for Data Audio in the software?
What am I missing here?

--

GB & 73
K5OAI
Sam Morgan

Sun, 21 Jul 2013 18:13:31 -0700
Joe Subich, W4TV said:

<quote>
I'm convinced of that ... the vast majority of rigs I've tested over
the years have a low-pass roll off characteristic to their audio -
generally in the 3 to 6dB per octave range from about 5OO Hz up.
This can be simulated in the K3 by setting 400 Hz at 0, 800 at -3,
1600 at -6, 2400 at -8 and 3200 at -9 (3 dB per octave - double
for -6 dB per octave). If one couples the 6 dB/octave roll off
with a bandwidth of 2.6 KHz (200 - 2800 Hz) there is very little
difference in the audio "sound" between the K3 and other mainline
rigs.

I prefer to keep my RX EQ flat from 400-2400 Hz, set 3200 at -16
and bring the bandwidth in to 2.4-2.6 KHz. The "flat" setting at
2400 effectively provides a little intelligibility boost compared
to the other rigs for those times I have to use SSB.
</quote>

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Joe Subich, W4TV-4

Re: K3 TX DATA EQ <was> Re: K3 RX AUDIO

TX EQ is automatically set to flat (as is RX EQ) in DATA modes.

73,

... Joe, W4TV

On 7/24/2013 1:59 PM, Sam Morgan wrote:

> (reference quote from Joe W4TV below)
>
> while trying to set up my K3's SSB EQ in the way Joe had mentioned,
> I happened on an interesting fact. What ever you set the SSB RX EQ for,
> sets the TX DATA for (Data Audio) as well.
>
> does this mean if I want to have a flat RX EQ when using Data Audio for
> WSJT-X which runs both JT65 & JT9-1, I would need to reset the SSB EQ to
> flat for data? Then set it back like below when I want to go back to SSB?
>
> Do we need another separate EQ setting for Data Audio in the software?
> What am I missing here?
>

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k5oai

Re: K3 TX DATA EQ <was> Re: K3 RX AUDIO

In reply to this post by k5oai

Wed, 24 Jul 2013 11:04:08 -0700
Joe Subich, W4TV said:

> TX EQ is automatically set to flat (as is RX EQ) in DATA modes.
>
I knew that was suppose to be true for TX
But if you Tap [MENU] then RX EQ and then the numbers 1 - 8
you will see it say the settings match the ones you set for SSB.

well then on the other hand ......
the TX EQ also says what SSB TX EQ is set to.

So what you are telling me is to quit believing my lying eyes, hi hi.
The internal software is goofy and showing incorrect info to me?
Both TX & RX are set flat for *ALL* data modes, yes?

--

GB & 73
K5OAI
Sam Morgan

On 7/24/2013 12:59 PM, Sam Morgan wrote:

> (reference quote from Joe W4TV below)
>
> while trying to set up my K3's SSB EQ in the way Joe had mentioned,
> I happened on an interesting fact. What ever you set the SSB RX EQ for,
> sets the TX DATA for (Data Audio) as well.
>
> does this mean if I want to have a flat RX EQ when using Data Audio for WSJT-X
> which runs both JT65 & JT9-1, I would need to reset the SSB EQ to flat for data?
> Then set it back like below when I want to go back to SSB?
>
> Do we need another separate EQ setting for Data Audio in the software?
> What am I missing here?
>

Joe Subich, W4TV-4

Re: K3 TX DATA EQ <was> Re: K3 RX AUDIO

I'm telling you that the K3 sets TX EQ FLAT in DATA Modes. I don't
have my K3 with me but that's the documented behavior and matches
what I've seen since the very beginning.

If you see anything other that FLAT in TX EQ when your are DATA A or
AFSK A, then your rig is not set up correctly.

73,

... Joe, W4TV

On 7/24/2013 2:21 PM, Sam Morgan wrote:

> Wed, 24 Jul 2013 11:04:08 -0700
> Joe Subich, W4TV said:
>
>
> > TX EQ is automatically set to flat (as is RX EQ) in DATA modes.
> >
> I knew that was suppose to be true for TX
> But if you Tap [MENU] then RX EQ and then the numbers 1 - 8
> you will see it say the settings match the ones you set for SSB.
>
> well then on the other hand ......
> the TX EQ also says what SSB TX EQ is set to.
>
> So what you are telling me is to quit believing my lying eyes, hi hi.
> The internal software is goofy and showing incorrect info to me?
> Both TX & RX are set flat for *ALL* data modes, yes?
>

Iain MacDonnell - N6ML-2

Re: K3 TX DATA EQ <was> Re: K3 RX AUDIO

If I try to adjust (with the VFO A knob) any of the sub-bands in
"MAIN:TX EQ x" (which are all "flat") whilst in DATA A or AFSK A mode,
the VFO B line displays "N/A". Curiously, though, when tapping the
number buttons, it does briefly display the SSB setting for that
sub-band, before the N/A "covers it up". I suppose that there's a some
logic in the firmware that overrides the stored values when in data
modes.

73,

~iain / N6ML

On Wed, Jul 24, 2013 at 11:34 AM, Joe Subich, W4TV <[hidden email]> wrote:

>
> I'm telling you that the K3 sets TX EQ FLAT in DATA Modes. I don't
> have my K3 with me but that's the documented behavior and matches
> what I've seen since the very beginning.
>
> If you see anything other that FLAT in TX EQ when your are DATA A or
> AFSK A, then your rig is not set up correctly.
>
> 73,
>
> ... Joe, W4TV
>
>
>
> On 7/24/2013 2:21 PM, Sam Morgan wrote:
>>
>> Wed, 24 Jul 2013 11:04:08 -0700
>> Joe Subich, W4TV said:
>>
>>
>> > TX EQ is automatically set to flat (as is RX EQ) in DATA modes.
>> >
>> I knew that was suppose to be true for TX
>> But if you Tap [MENU] then RX EQ and then the numbers 1 - 8
>> you will see it say the settings match the ones you set for SSB.
>>
>> well then on the other hand ......
>> the TX EQ also says what SSB TX EQ is set to.
>>
>> So what you are telling me is to quit believing my lying eyes, hi hi.
>> The internal software is goofy and showing incorrect info to me?
>> Both TX & RX are set flat for *ALL* data modes, yes?
>>
> ______________________________________________________________
> Elecraft mailing list
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>
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k5oai

Re: K3 TX DATA EQ <was> Re: K3 RX AUDIO

In reply to this post by k5oai

to clarify.....
I do/did understand the TX EQ is set to flat for transmit for *ALL* data modes!

what I was still curious about was
if the RX EQ is also flat (and *NOT* user configurable) on *ALL* data modes

I finally found my answer in the fine manual on page 52:
Revision D10, August 24, 2011

======
RX EQ
Receiver audio graphic equalizer. VFO A is used as an 8-band bar graph, showing
boost or cut ( -16 dB to +16 dB in 1 dB increments) for each AF band. The 8 bands
are 0.05, 0.1, 0.2, 0.4, 0.8, 1.6, 2.4 and 3.2 kHz. Tap 1 -8 to select an AF
band. VFO
A selects boost/cut. Tap CLR to reset all bands to +0 dB.
CW RX EQ is separate from RX EQ for voice modes. Not applicable to DATA.
======

the last line answers my question. "Not applicable to DATA"

so when the mode is set to DATA TX
the RX EQ db level settings that I see in the display
*when* the 1-8 buttons are pushed, are incorrect .

in this case the flat line dashes
are the true representation of the RX EQ setting when in *ANY* Data mode

sorry for all the confusion folks.

topic closed please

--

GB & 73
K5OAI
Sam Morgan

On 7/24/2013 1:21 PM, Sam Morgan wrote:

Jim Brown-10

Re: K3 TX DATA EQ <was> Re: K3 RX AUDIO

In reply to this post by k5oai

On 7/24/2013 10:59 AM, Sam Morgan wrote:
>
> Do we need another separate EQ setting for Data Audio in the software?

At the beta test stage for the K3, it was learned that the audio
transformers, which are unshielded, can couple a strong magnetic field
into the audio circuits (most often from a big power transformer located
on a shelf above or below the K3). I experienced a mild case of this
myself, and my neighbor, K6XX, now an engineer at Elecraft, had enough
coupling that the K3 regenerated the field and locked in TX.

Wayne and I talked about this. My first recommendation was to ditch the
transformers, which are completely un-necessary if all the gear in the
station is properly bonded together. Probably for marketing reasons
(because most hams are convinced that transformers are needed), Elecraft
chose my second suggestion, which was to program the TXEQ to roll off
the low end sharply, with a cutoff on the order of 250 Hz. So, last I
heard, that's what's in place for analog data modes.

73, Jim K9YC
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