121 ...editoval laco (3. 3. 2021 21:14)

Re: 0V GND AGND PGND SGND PE ground zem

Merania sumu zabudovaneho modulu v zosilnovaci KLA120 (nap zosilnenie 29dB)

OUTPUT KL120 priamo do zvukovej karty (kalib dBV), 24bit/48kHz/FFT64k


Input RCA, 47R medzi H a C (bez vstupneho modulu B2UIA)
SUM/BRUM = -94.74dBV = 18.3uVrms

https://i.ibb.co/ryjzWNM/KLA120-RCA-SNR.png

B2UIA Input RCA, 47R medzi Hot a Cold (pouzivam IN1, teda jeden opamp [NE5532] v ceste)
SUM/BRUM = -90.37dBV = 30.3uVrms

https://i.ibb.co/SK6tfJ7/KLA120-B2-UIA-RCA-SNR.png

B2UIA Input XLR, 220R medzi PIN2 a PIN3
SUM/BRUM = -82.66dBV = 73.6uVrms

https://i.ibb.co/XXYkMcv/KLA120-B2-UIA-XLR-SNR.png