[K3] [Elecraft] in-band-IMD test

[Barry N1EU]

Alexander Ponomarenko-5 wrote:
> 
> all these measurements, for all radios has been via PHONE-OUT.
> There is two-tone measurements, but you can see these IMD even with XG1 
> set to s9-level.
> Here is my K3 with s9-signal from XG1:
> - ATT On http://forum.cqham.ru/download.php?id=32030
> - ATT/PRE Off http://forum.cqham.ru/download.php?id=32031
> - PRE On (it's terrible)  http://forum.cqham.ru/download.php?id=32032
> 

Please take two consecutive spectrum readings with PRE On, AGC Off from the
headphone jack - take one with S9 signal from XG1 and take the second with
the XG1 generator turned off (i.e., with no signal in the passband).  Please
post these two spectra.

I suspect many of the spikes in your spectrum reading are not related to the
received signal.

Thanks,
Barry N1EU

-- 
View this message in context: http://n2.nabble.com/in-band-IMD-test-tp1491448p1491878.html
Sent from the [K3] mailing list archive at Nabble.com.