Viper 60s Theory Of Operation And Maintenance Manual page 163

VIPER 5C5160, 125 & 150 THEORY OF OPERATION AND MAINTENANCE
6.9.2.7 Format Differences
The differences in fonnat between QIC-24, QIC-120, and QIC-1S0 are detailed below.
QIC·24 QIC-120
QIC·150
Density (ftpi) 10,000 12,500
12,500
Bit Cell Width (ulnch) 100 80 80
Tracks
9
15
18
Format: Preamble
(Flux Trans):
Normal
120-300 160-300 160-300
Elongated
3,500-7,000
3,500·8,500 3,500-8,500
Long
15,000-30,000 15,000-30,000 15,000-30,000
Postamble
(Flux Trans):
Normal 5-20 5-20 5-20
Elongated 3,500-7,000 5,500-8,500 5,500-8,500
Track Width (inches) 0.0135
0.0065 0.0056
Azimuth (minutes) 3
12
12
First Block Data Control Control
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