以下是Spencer兄寫給小弟讓大家參考的量測資料,請參考,並歡迎看的懂的網友多討論
I have measured the D1V3 for 10Hz to 10kHz using an old spectrum analyzer and attached is the photo of the results.
1. Input 1kHz at 0dbfs and you can see the 2k, 3k and 4k Hz harmonics. Vertical scale is 10db/div and horizontal is 1kHz/Div. The second harmonic 2kHz is only 48db below the 1khz signal. Thus the IV is very rich in 2nd harmonic distortion. Top 0db scale on screen = +10dbm.
2. Input 1kHz signal at -80dbfs and you can see there are lot of noises but normally at about -110db or lower. Using a Meguro noise meter give the noise rms valuse at about -110dbV and thus it is very much same result. Top 0db scale on screen = -70dbm.
You can post these pictures in your website as I have agreed to update.