The Elecraft K3 also has a built-in 2 TONE generator.
Switch to SSB mode
Set *CONFIG:TECH MD ON*
Set *CONFIG:2 TONE ON*
Exit the menu and tap the *XMIT* button. You can vary the amplitude of one
of the tones using the MIC knob; the other is fixed.
73,
Bob, N6TV
On Tue, May 21, 2019 at 5:45 AM Conrad PA5Y <g0ruz@g0ruz.com> wrote:
> Hello Peter the best way of generating a clean 100W - 2 tone test is to
> use an ANAN SDR equipped with Pure signal. PowerSDR mRX has a 2 tone test
> built in. Then if you have a good SA just use that. As an alternative to a
> SA a Perseus SDR with an appropriate attenuator will allow you to do a good
> job.
>
>
> The alternative is to build a couple of good signal sources or use 2 good
> signal generators with isolators and a class A amplifier that can achieve
> better than -50dBc on 3rd orders. This is quite difficult hence my
> suggestion of using an ANAN with Pure Signal active.
>
>
> 73
>
>
> Conrad PA5Y
>
>
> ________________________________
> From: Amps <amps-bounces@contesting.com> on behalf of Peter Bertini <
> radioconnection@gmail.com>
> Sent: 20 May 2019 20:40
> To: amps@contesting.com
> Subject: [Amps] Measuring IMD in a home workshop
>
> I'm wondering what techniques others are using to make IMD tests for
> external RF power amps using test gear that would be commonly found in a
> home workshop.
>
> Spectrum Analyzers are cheap enough--I have several vintage HP 141T
> analyzers set up, and a very capable Tek 497P with 100/10 Hz RBW.
>
> My problem regarding two or three tone tests is that my rigs all have
> comparably terrible IMD. Several Ten Tec rigs, and a JRC NSD-515. None of
> them have spectacular IMD performance. How do you get around these
> limitations?
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