Data Format (2321) - IBM System/360 Field Engineering Manual

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Data Format (2321)
r-
Leod Area
36 Bytes
Ones
Zeros
VFO Area - 5 Bytes
Zeros Zeros Ones
Address Mark Area
2 Bytes
Ones Ones
5 Bits Missing 5 Bits Missing
Clock Pulses Clock Pulses
No Clock No Clock
11111111 00000000 00000000 00 0000 11111111 11111111 11111111
Legd Byte
lead Area - 8 Zeros
VFO Area - 4 Bytes
Zeros Zeros Zeros Zeros Zeros
Ones
Bit Ring
Sync Area
l Byte
4 Bits Zeros
I Bit One
2 Bits Zeros
] Bit One
00001001
Bit Ring
Sync Area
l Byte
4 Bits Zeros
3 Bits Ones
1 Bit Zero
J l 001100 00000000 00000000 00000000 00000000 00000000 1J111111 0000111 0
VFO Area - 9 Bytes
Bit Ring
Lead Byte Lead Area - 3 Ones
Sync Area
8 Bytes Zeros 1 Byte
Ones Ones Zeros
Zeros
Zeros
Ones 4 Bits Zeros
3 Bits Ones
1 Bit Zero
l 1 0 0 l 1 0 0 11111111 1111 l l l l
00000000 00000000 00000000 111111 I l 000011'10