Option Selection; Variable Frequency Oscillator; Specifications - NEC FDl165 Product Description

1.2.11 Option Selection
The FDl165 is equipped with signal function selection plugs,
as well as drive door and busy lamp function plugs. These
function plugs allow you to tailor the disk drive to suit
your particular needs.
See
Section 2.4.2.3 for a full de-
scription of these features.
1.2.12 Variable Frequency Oscillator (Optional)
The optional VFO makes the interface signals to the con-
troller more stable. This feature increases the overall
reliability of the disk drive.
1.3 SPECIFICATIONS
Capacities for the Model FDl165 Flexible Disk Drive are
listed in Table 1-1. Mechanical, electrical, environmental,
and performance specifications are listed in Table 1-2.
Table 1-1 Model FD1l65 Capacity (Formatted)
CAPACITY SINGLE-SIDED DUAL-SIDED
DUAL-SIDED
(Bytes)
SINGLE-DENSITY SINGLE-DENSITY
DOUBLE-DENSITY
Per diskette
24(;K
284K 303K 493K 568K 606K 985K
1137K 1212K
Per track
3328 3840 4096 3328 3840 4096
6656 7680 8192
Per sector
128 256 512 128
256 512 256 512
1024
Sectors per
track
26 15 8 26 15 8 26 15
8
Table 1-2 Model FD1l65 Specifications
FEATURES SPECIFICATIONS
Single-Sided
Dual-Sided Dual-Sided
Single-Density Single-Density
Double-Density
Capacity (unformatted) 400K bytes
800K bytes
1,600K bytes
Capacity (formatted-maximum)
Per Disk 303K bytes
606K bytes 1,212K bytes
Per Track 4,096 bytes
4,096 bytes
8,192 bytes
Per Sector 512 bytes 512 bytes
1,024 bytes
Tracks per Disk 77
154
154
Bit Density
3,268 bpi
3,408 bpi
6,816 bpi
Transfer Rate 250K bps 250K bps
500K bps
Recording Method
FM FM
FMM
1-5