The basic procedure is outlined here:
There is no need to use that given modulation meter, the important
part is to look at the change of the demodulated output. This can be
obtained with a diode detector and read with a oscilloscope. The
important part is that you calibrate to find the detector constant at
low levels, so it does not compress.
C# code for the above meter is here:
73 de Thomas LA3PNA.
Den ons. 13. feb. 2019 kl. 07:40 skrev Christian W. Correa <hk4qwc@...>:
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Thomas:
This technique looks interesting. Would you mind sharing a source with details?
Thanks.
Christian W.
HK4QWC
On Sun, Feb 10, 2019 at 07:03 AM, Thomas S. Knutsen wrote:
I have started to use a new approach to 1dB compression point in mixers and amplifiers where you take a 30% AM modulated signal and feed through the DUT, then increase the level until that AM becomes unsymmetrical. Then the 1dB compression point is a simple calculation.
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With Best regards, Thomas S. Knutsen.
Please avoid sending me Word or PowerPoint attachments.
