Worth Data RF Laser Postamble, Bar Code Data Preamble Data Transmitted 123, XYZ123, 12345678

The default is no preamble. To select a preamble, scan up to 15 characters from the "FULL ASCII MENU" on the back of the RF Laser Setup Menu, and then scan SET when you're done. To return to the no preamble setting, scan Clear here instead of scanning SET or any characters from the FULL ASCII MENU.

You can trim 1-15 leading characters from bar code codes by scanning a ~ (tilde -- ASCII 126) followed by a single digit, 1 through F, as part of the Preamble. (Bar codes that are shorter than the amount-to-trim are transmitted with no trimming.) Consider the examples in the following table to understand how trimming works:

Bar Code Data	Preamble	Data Transmitted
123	XYZ	XYZ123
12345678	~3XYZ	XYZ45678
12345678	~9	12345678
12345	~A	12345
123456	~5	6

You can also trim selectively by bar code type. For example, you can trim 2 characters from Code 39 and a different amount from other bar code outputs. This is done by using the bar code ID character in conjunction with the tilde (~). A preamble of ~b2~c1 says trim 2 characters from the front of Code 39 output and trim 1 character from the front of UPC-A. Refer to the Code 128 parameter on page 12 for a list of the ID character associated with each bar code type.

A final use of the Preamble/Postamble is to enter a minimum/maximum length check for bar code data read. Use the Preamble or Postamble by entering nnmm where "" is ASCII 124, "nn" is the two digit minimum to be read and "mm" is the two digit maximum to be read.

Postamble

"Postamble" refers to a user-specified data string transmitted at the end of each bar code. For instance, if you specify the postamble @@ and read data of 123456, "123456@@" would be transmitted to your computer.

The default is no postamble. To select a postamble, scan up to 15 characters from the "FULL ASCII MENU" on the back of the Reader Setup Menu, and then scan SET when you're done. To return to the no postamble setting, scan CLEAR here instead of scanning SET or any characters from the FULL ASCII MENU.

You can trim 1-15 trailing characters from bar code codes by scanning a ~ (tilde

--ASCII 126) followed by a single hex digit, 1 through F. (Bar codes which are shorter than the amount-to-trim are transmitted without trimming.) Consider the examples in the following table to understand the options of the Postamble:

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