Posted on Sunday, 8th August 2010 by Auw Jimmy
I was playing with my Rigol Oscilloscope to measure my laptop power output. The sound card was Realtek ALC660.
I played a 1 kHz sine wave with a software and measure the output. Since this was not an isolated environment (I have some application running on the background), so the frequency measured was not completely locked at 1 kHz.
On my typical daily usage, the output measured at 102 mV.
I cranked up everything to maximum to see how loud the output is. My oscilloscope detected around 1.22 Volt clean output. This was quite nice and adequate for most application.
We will check some other sound card later, while I also needed to improve my oscilloscope usage skill.
Tags: ALC, measurement, oscilloscope, Realtek, Rigol
Posted in DIY Audio, Measurement | Comments (4)




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September 12th, 2010 at 21:23
Maaf pertanyaan saya menyimpang dari topik.
Dengan makin mahalnya trafo-trafo bermutu tinggi yang bedaya besar, terbetik di fikiran kenapa tidak memakai power supply switching yang lebih murah sebagai penggerak ampli2 audio?
- Pernahkah Pak Jimmy mencoba ide diatas?
- Pernahkah Pak Jimmy melakukan pengukuran kualitas switching power supply?
Terima kasih
September 12th, 2010 at 21:51
Pak Rahadi,
Sejauh ini power supply jenis switching memang masih belum jadi kandidat. Hal ini dikarenakan prinsip kerja power supply switching itu sendiri memang “kurang cocok” untuk aplikasi audio, khususnya untuk aliran idealis. Faktor lain adalah power supply switching kebanyakan berjenis step-down, sedangkan trafo step down jenis biasa (non-switching) sangat mudah ditemukan di pasaran, bahkan mau custom tegangan pun sangat gampang sekali. Berbeda dengan switching yang lebih rumit secara teknologi untuk di-custom.
Saya hanya pernah coba sebatas di aplikasi filament lampu tabung. Di aplikasi lain belum pernah.
Thanks.
October 29th, 2010 at 16:22
Pak Jimmy , Rigol Oscilloscope ini seri apa ?
belinya dimana dan harganya berapa ?
saya baru mulai maen audio , pengan nyari ossiloscope entry level
October 29th, 2010 at 18:00
Halo Pak Andry,
Rigol saya seri DS1052E. Harga di sini saya kurang tahu, karena belinya di luar.
Thanks.