Panasonic JB-3300 Technical Manual page 431

Write precompensation detection pattern
The precompensation bit patterns are shown in the table below.
-- HOW TO READ THE TABLE --
The bit patterns are monitored by the bit shift register, with the bit
timing indicated by the third bit.
Bit Pattern Precompensation Data
O -Q000 0 NORMAL CLOCK
1]/ ooo1 | EARY CLOCK
2 0010 _ NORMAL DATA
3 Oo0l1l LATE DATA.
4 O10 0 ——_—_—
5 O1l01 ——_——
6 O11 0 EARY DATA
7 Ol1ltl1l1 NORMAL DATA
8 1000 LATE CLOCK
9 Lool | NORMAL CLOCK
A 1010 NORMAL DATA
B 1011 LATE DATA
Cs: 1100 — * These data are
| effective during
D lilol ——- MFM mode.
i 1110 EFARY DATA
F lT1lill NORMAL DATA
When internal precompensation is selected, 10 ns +30% of precompensation
is added. |
VII - 36