Psion Teklogix PX750 manual Decode Perf. Level, Length Restriction, Add/Remove Data

Chapter 5: Configuration

Decoded (Internal) Scanners

Decode Perf. Level

This parameter provides three levels of decode performance or “aggressiveness” for Code 39 symbols. Increasing the performance level reduces the amount of required bar code ori- entation—this is useful when scanning very long and/or truncated bar codes. Keep in mind that increased levels reduce decode security.

When you double-tap on this parameter, a dialog box is displayed in which you can enter a decode performance level of between 1 and 3.

Length Restriction

The parameters in this sub-menu allow you to define the length of the bar codes that will be decoded using either the “Field Size” parameter or the “Minimum Size” and “Maximum Size” parameters (see below). The order of operation to either match the “Field Size” or de- termine if the length falls between the “Minimum Size” and “Maximum Size” is as follows:

•Strip the leading and trailing characters.

•Add the prefix and suffix characters.

•Count the number of characters remaining to either match the field size or determine if the length falls between the minimum and maximum size.

Field Size

When a value is assigned for this parameter, only bar codes that match the field size exactly can be transmitted. If a value is assigned to this parameter, a “Minimum Size” and “Maxi- mum Size” value is not required.

Minimum Size And Maximum Size

When a value is assigned to these parameters, only bar code lengths that fall between the minimum and maximum value can be decoded. If values are assigned to these parameters, a “Field Size” value is not required.

Add/Remove Data

Prefix Char

This character, if non-zero, is added before a successfully decoded bar code. Press the key you want to insert in the dialog box attached to this parameter. The ASCII/Unicode key value of the keypress is displayed.

Suffix Char

This character, if non-zero, is added after a successfully decoded bar code. Press the key you want to insert in the dialog box attached to this parameter. The ASCII/Unicode key value of the keypress is displayed.

142Psion Teklogix NEO Hand-Held Computer User Manual