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TX EQ on data modes

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Buck - k4ia

TX EQ on data modes

I am not sure I like that result. Should the TX EQ (and for that matter the
RX EQ) be turned off automatically in DATA A and AFSK modes?

k4ia
Buck
#101

In a message dated 3/27/2008 1:29:17 P.M. Eastern Daylight Time,
[hidden email] writes:
Tx EQ only applies to modes where audio is used to create the final
transmission. So it applies to AM, FM, SSB, DATA A and AFSK, but not
FSK-D, PSK-D or CW.

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Bill VanAlstyne W5WVO

Re: TX EQ on data modes

No, but the K3 should have a mode memory so that particular EQ settings
(including OFF) remain with particular modes when changing back and forth. TX
EQ can be potentially useful in equalizing the amplitudes of the four tones in
FSK441 (used in high-speed meteor scatter) if the TX passband isn't quite
flat. You might even want to boost the high and low tones just a tad to
compensate for other guys' too-narrow passbands on RX...

Bill W5WVO

[hidden email] wrote:

> I am not sure I like that result. Should the TX EQ (and for that
> matter the RX EQ) be turned off automatically in DATA A and AFSK
> modes?
>
> k4ia
> Buck
> #101
>
> In a message dated 3/27/2008 1:29:17 P.M. Eastern Daylight Time,
> [hidden email] writes:
> Tx EQ only applies to modes where audio is used to create the final
> transmission. So it applies to AM, FM, SSB, DATA A and AFSK, but not
> FSK-D, PSK-D or CW.

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Leigh L. Klotz Jr WA5ZNU

Re: TX EQ on data modes

Administrator

I would also like to see separate (or even NO) EQ on RX/TX for data modes.
I often set up the RX EQ so SSB sounds good, and then when I go back to
PSK I see the waterfall is very noisy and odd looking.
Leigh/WA5ZNU

Bill W5WVO wrote:

> No, but the K3 should have a mode memory so that particular EQ
> settings (including OFF) remain with particular modes when changing
> back and forth. TX EQ can be potentially useful in equalizing the
> amplitudes of the four tones in FSK441 (used in high-speed meteor
> scatter) if the TX passband isn't quite flat. You might even want to
> boost the high and low tones just a tad to compensate for other guys'
> too-narrow passbands on RX...
>
> Bill W5WVO
>
> [hidden email] wrote:
>> I am not sure I like that result. Should the TX EQ (and for that
>> matter the RX EQ) be turned off automatically in DATA A and AFSK
>> modes?
>>
>> k4ia
>> Buck
>> #101
>>
>> In a message dated 3/27/2008 1:29:17 P.M. Eastern Daylight Time,
>> [hidden email] writes:
>> Tx EQ only applies to modes where audio is used to create the final
>> transmission. So it applies to AM, FM, SSB, DATA A and AFSK, but not
>> FSK-D, PSK-D or CW.
>

Joe Subich, W4TV-3

RE: TX EQ on data modes

> I would also like to see separate (or even NO) EQ on RX/TX
> for data modes. I often set up the RX EQ so SSB sounds good,
> and then when I go back to PSK I see the waterfall is very
> noisy and odd looking. Leigh/WA5ZNU

Agreed. Both RX EQ and TX EQ should be mode specific at the
minimum ... TX EQ should be both input and mode specific.

After looking at the receiver response with broadband noise,
I notice the 50 Hz adjustment of the RX EQ shows no effect
and 100 HZ has minimal impact. For RX purposes it might be
preferable to delete the 50 Hz bucket and add a control at
4 KHz - particularly for those using the FM filter on AM.

73,

... Joe Subich, W4TV
microHAM America
http://www.microHAM-USA.com
http://groups.yahoo.com/group/microHAM
[hidden email]

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Leigh
> L. Klotz, Jr.
> Sent: Thursday, April 17, 2008 11:23 AM
> To: Bill W5WVO
> Cc: [hidden email]; [hidden email]
> Subject: Re: [Elecraft] TX EQ on data modes
>
>
> I would also like to see separate (or even NO) EQ on RX/TX
> for data modes. I often set up the RX EQ so SSB sounds good,
> and then when I go back to
> PSK I see the waterfall is very noisy and odd looking. Leigh/WA5ZNU
>
> Bill W5WVO wrote:
> > No, but the K3 should have a mode memory so that particular EQ
> > settings (including OFF) remain with particular modes when changing
> > back and forth. TX EQ can be potentially useful in equalizing the
> > amplitudes of the four tones in FSK441 (used in high-speed meteor
> > scatter) if the TX passband isn't quite flat. You might
> even want to
> > boost the high and low tones just a tad to compensate for
> other guys'
> > too-narrow passbands on RX...
> >
> > Bill W5WVO
> >
> > [hidden email] wrote:
> >> I am not sure I like that result. Should the TX EQ (and for that
> >> matter the RX EQ) be turned off automatically in DATA A and AFSK
> >> modes?
> >>
> >> k4ia
> >> Buck
> >> #101
> >>
> >> In a message dated 3/27/2008 1:29:17 P.M. Eastern Daylight Time,
> >> [hidden email] writes: Tx EQ only applies to modes where
> >> audio is used to create the final transmission. So it
> applies to AM,
> >> FM, SSB, DATA A and AFSK, but not FSK-D, PSK-D or CW.
> >
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