Bit Error Rate和Q factor有什麼關聯?

jelly811737

Bit Error Rate和Q factor有什麼關聯?
7 R/ K# K8 O* P) S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，
所以在想BER和Q factor是否有關聯性存在。
安捷倫公司有解釋:
What is Q Factor?
( }9 L7 L. k9 O1 v
  a9 w4 m: E& \" hQ is a measure of the electrical signal to noise of the system at the receiver decision threshold.
When it is impractical to measure BER with conventional techniques, Q may be used to estimate BER.
Q Factor is a figure of merit often used in optically amplified systems in which noise from the amplifiers dominates receiver noise.
  b7 g6 _/ V0 r0 ^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。
; d' G% f% |. ~4 m7 ~# F: T- ~! v6 A麻煩各位幫幫我。