Fujitsu M2301B Manual page 90

(l)WRITE DATA (NRZ)
CL
CL el-
I
0 0 0 0 0 0 0 0
0 0 0
0
o.
0
WOP (MFM)
-
I
-
(2)WRITE DATA (NRZ)
i I
1
1 1 1 1 1 1 , 1
I
1
1 1 1 1 1
WOP (MFM)
I
I I I
I I
,
I 1 I 1
I I I I
I
1
I r
!
I
f
!
1
0 1 0 1 0 1
,
0 1 0 1
0 1 0 1
I
(3)WRITE DATA (NRZ)
-
I
!
~
WOP (MFM)
I
i
I I
r
I
1
J
I
I
I
I
I
0 1 1 0 1
0 0 0 1 1 1
0 1 0
(4) WRITE DATA (NRZ)
WOP (MFM)
I 1
I
I
I l I
-
MFM Recording Rules:
1. There is a flux transition for each "1" data bit.
2. There is a flux transition between each pair of "0" data bits.
3. There is no transition between "01 "or "10" data bit patterns.
Fig. 4.26 Correlation between NRZ and MFM