標題: Bit Error Rate和Q factor有什麼關聯? [打印本頁] 作者: jelly811737 時間: 2008-1-23 02:27 PM 標題: Bit Error Rate和Q factor有什麼關聯? Bit Error Rate和Q factor有什麼關聯? . m1 K8 ]& o" F' N由於在安捷倫示波器量測眼圖時發現有量測Q factor這個功能， 9 d" r+ S* W6 f: u所以在想BER和Q factor是否有關聯性存在。( T8 f- I# [" z' }+ e
安捷倫公司有解釋:- I. c( f, X4 E: n: R
What is Q Factor? , d, E2 C3 y1 t1 ^. \7 T5 X, O# b: Z
4 W' I! u4 q$ n4 F/ e; N
Q is a measure of the electrical signal to noise of the system at the receiver decision threshold. # u5 M( S# C& ?2 L# y
When it is impractical to measure BER with conventional techniques, Q may be used to estimate BER. $ e' t- U. a9 ]! XQ Factor is a figure of merit often used in optically amplified systems in which noise from the amplifiers dominates receiver noise.8 y# n4 I! v- E& E) l
A Q measurement application is included in every N4906A.8 h; H* L% I) w/ V1 A4 x8 g' E
; T" l- [* w: L5 T; g$ c
想請問各位先進是否知道有BER和Q factor的轉換方程式，或是其他相關資料。 $ b% W4 \) E, g. G麻煩各位幫幫我。