Tandy 1400LT Service Manual page 222

C. 3.5 inch FDD SPECIFICATIONS
1. Introduction
SPECIFICATIONS SUMMARY
Performance Specifications
Single Double
Density Density
Capacity (Kbytes)
unformatted
Per Disk
500 lo00
Per Surface
250 500
Per Track
3.125 6.25
16 Sectors/Track 327.6 655.2
9 SectodTrack
368.6 737.2
5 Sectors/Track 409.6 819.2
Formatted Per Disk
Transfer Rate (Kbit/sec) 125 250
Access Time (msec)
Average Latency (msec) 100 100
Track to Track without Settling 6 6
Average with Settling
169 169
Settling Time (msec) 15 15
Motor Start Time (sec) 0.5 0.5
Functional Specifications
Single Double
Density Density
Rotational Speed (r.p.m)*
300 300
Recording Density (BPI) 4359 8717
Track Density (TPI) 135 135
Tracks 160 160
Encoding Method FM MFM
*
Rational speed is automatically changed by internal sensor.
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