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Appendix A Product Information 161
IBM4746
HT-2751-CIZ
Bit density 210 bpi ± 5%
Recording direction Left to Right
Preamble 20 bits
SOM (Start sentinel) BA
Recordable characters 0-9, D
EOM (End sentinel) F or C
LRC Parity even
Postamble 20 bits
Maximum number of
recordable characters
(1 block)
105 characters
Maximum number of
recordable characters
(2 block)
45 characters
Number of separator 120 bits
Center of vertical position 10.4 mm
Horizontal start position 9.8 mm from the left edge
Bit density 105 bpi ± 5%
Recording direction Right to Left
Preamble 55 bits
SOM (Start sentinel) F
Recordable characters 0-9
EOM (End sentinel) F
LRC Parity odd