SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAGE 5
MODEL
SFD-321B
* Read/Write Compensation : 125ns is 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 Ejecting Distance 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 precompensation on both heads.
Asymmetry 600 ns Max. 300 ns Max.
1. Measured with Brikon 723B on Track 00
with 0 ns precompensation on both heads.
Radial Alignment
Both R/W heads must be radially aligned to all tracks
with in
±
0.0200 mm when accessed from either
direction.
Measurement is to be made at normal voltage and
normal environmental condition
(23
±
2
℃
and 50
±
5 % RH)
Azimuth Alignment
±
0
°
18
′
Max.
Index to Data Burst
0 ~ 1300
μ
s
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 at Track 00
