Bit Error Rate和Q factor有什麼關聯?

jelly811737

Bit Error Rate和Q factor有什麼關聯?
$ K7 Z" _5 q* u. [! t& x& x& \+ U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，
/ }2 O* e% k! {) e0 \1 M4 \所以在想BER和Q factor是否有關聯性存在。
安捷倫公司有解釋:
7 j, T1 j1 o$ n8 D1 l' L$ Q5 D( KWhat is Q Factor?
/ ?% Z' d- J  e2 N; Z" J
Q is a measure of the electrical signal to noise of the system at the receiver decision threshold.
5 l/ F2 ]/ _1 z4 ]4 I  x( @When it is impractical to measure BER with conventional techniques, Q may be used to estimate BER.
* ~" T4 r$ e: ~( i3 lQ Factor is a figure of merit often used in optically amplified systems in which noise from the amplifiers dominates receiver noise.
A Q measurement application is included in every N4906A.

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。
( v4 x( n+ g& z) u: z8 d$ V麻煩各位幫幫我。