Performance; Encoding Technique; Msf Read/Write; Printer Dimensions With Msf Device Installed - Digital Equipment LB12 Field Support Manual

1.5.2

Performance

1.5.3

Encoding technique

1.5.4 Specifications

MSF read/write

Packing density
Read/write speed
Return speed
Number of tracks
Number of characters
Character I/O format
Parity
Transaction time

Printer dimensions with MSF device installed

Height, front
Height, back
Document guide depth
9710
Data recording is performed in accordance with the DIN 32744/ISO 8484 standards.
Usually, data recording is carried out in accordance with the DIN 32744 standard, which
means that a string of maximum 48 characters is written twice (i.e. the basic string followed
by a duplicate) in a single track on the magnetic stripe.
Recording in accordance with the ISO 8484 standard means either that a string of up to 108
characters is written or that a string of up to 48 characters is written twice (i.e. as defined by
the DIN 32744 standard).
Non-standard start and stop sentinels can be selected from the application.
Read after write is always performed to check that the string has been recorded correctly.
After a duplicate recording, both strings (or records) are read and compared to ensure that
they are equal.
Reading and writing is performed while the R/W head moves at constant speed. Writing is
performed when the R/W head moves from right to left whereas reading can be performed
in any direction.
The encoding technique used is the F/2F encoding system, which allows serial recording of
self-clocking data. This means that the data string comprises both data bits and clock
signals. A flux transition occurring between clocks signifies a ONE, whereas the absence of
such a flux transition signifies a ZERO.
The data is recorded as a continuous sequence of characters with no inter-character gap.
The data string is both preceded and followed by at least 20 synchronizing ZERO bits. In
the event of of duplicate recording, the inter-record gap consists of at least 60 ZERO bits.
210 bits per inch ±5%.
8 inches per second.
8 inches per second.
1.
108 maximum (excluding pre- and post-amble).
5 bits (4 data + 1 parity bit), LSB first.
Odd.
2.5 s approx. (2 forward + 2 backward movements).
197mm.
215mm.
96 mm.
LB12/LB15 Field Support Manual 1-19