IBM System/360 Field Engineering Manual page 100

Lead Byte
Index
36 18
Bytes (5
+
2) Bytes Bytes
Vgriable Area
21 Byte Min
of Good Data
Ones
(9
+
2) Bytes
VFO Areo - 5 Bytes
Zeros Zeros Zeros Zeros
Address Mork Areo
2 Bytes
Ones Ones
5 Bits Missing 5 Bits Missing
Clock Pulses Clock Pulses
Bit Ring
Sync
Byte
4 Bits Zeros
3 Bits Ones
1 Bit Zero
~~.
00000000 00000000 00000000
]'~"1""i''-'i'"l 1 111
11111111 0000111 0
Vorioble
Length
18 (1+2)To
Bytes Full Track B Bytes
RO Record
Byte
(9
+
2) Bytes
Varioble
Length
Voriable
Length
18 0-255, 18 (3625+2)
Bytes +2 Bytes Bytes Bytes Max
Normal Record