SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPE CIFICATION PAGE 5
MODEL SFD-321B

* Read/Writ e Compensation : 125ns i s recommended

ITEM
LOW
DENSITY
STANDARD
1MB
HIGH
DENSITY
STANDARD
2MB
HIGH
DENSITY
*OPTION*
1.6MB
Media Operating
Force
Inserting 800 gr Max.
Ejecting 1300 gr Max.
Media E jecting D istan ce 10 ~ 70 mm
AcousticNoiseat50cm
-at3msStepRate 50 dBA Max.
Read Bit Shift 1300 ns Max. 650 ns Max.
1. Measured with Brikon 723B on Track 79
with 0 ns precompensationon both heads.
Asymmetry 600 ns Max. 300 ns Max.
1. Measured with Brikon 723B on Track 00
with 0 ns precompensationon both heads.
Radial Alignment
Both R/W headsmust be radially aligned to all tracks
within ±0.0200 mm when accessed from either
direction.
Measurement is to be made atnormal voltage and
normal environmental condition
(23±2and 50±5 % RH)
Azimu th Align ment ±0°18Max.
Index to Data Burst
0 ~ 1300 μs
Measurement is to be made from the leading edge of
index pulse to the beginning of data burst on
Track 40.
Overwrite Modulation -26 dB or less a t Track 00