User manual

Page 19 of 61

MS246 User Manual

‘3’ moving stripe along head against the direction of encoding.

With the bi-directional method, the user can swipe the card in either direction and

still read the data encoded on the magnetic stripe. Otherwise, the card can only be

swiped in one specified direction to read the card. Raw Decoding just sends the

card’s magnetic data in groups of 4 bits per character. No checking is done except

to verify that the track has or does not have magnetic data.

7.9.5. Terminator Setting

Terminator characters are used to end a string of data in some applications.

02 53 21 01 <Terminator Settings> 03 LRC

Any one character, 00h is none; default is CR (0Dh).

7.9.6. Preamble Setting

Characters can be added to the beginning of a string of data. These can be special

characters for identifying a specific reading station, to format a message header

expected by the receiving host, or any other character string. Up to fifteen ASCII

characters can be defined.

02 53 D2 <Len><Preamble> 03 LRC

Where:

Len = the number of bytes of preamble string.

Preamble = {string length}{string}.

NOTE: String length is one byte, maximum fifteen <0Fh>.

7.9.7. Postamble Setting

The postamble serves the same purpose as the preamble, except it is added to the

end of the data string, after any terminator characters.

02 53 D3 <Len><Postamble> 03 LRC

Where:

Len = the number of bytes of postamble string

Postamble = {string length}{string}

NOTE: String length is one byte, maximum fifteen <0Fh>.

7.9.8. Track n Prefix Setting

Characters can be added to the beginning of a track data. These can be special

characters to identify the specific track to the receiving host, or any other