IBM 4400 manual Ups, UPS 11 Structure

Chapter 7 Bar Codes

UPS 11

The UPS 11 structure is shown in Figure 25 and described below.

			OPTIONAL
			CHECK DIGIT
SR, SC
POSITION
		UPPER GUARD BAND
QUIET	START	DATA FIELD	STOP	QUIET
ZONE	CODE		CODE	ZONE

HEIGHT

LOWER GUARD BAND

OPTIONAL READABLE DATA FIELD

Figure 25. UPS 11 Structure

Quiet Zone

Both ends of the bar code structure require blank quiet zones. The quiet zones must be at least 0.25 inches wide and completely blank to ensure accurate reading of the start/stop codes and to prevent adjacent bar codes from overlapping. Be sure to provide sufficient space on the form for the quiet zones.

Start/Stop Codes

The start/stop codes identify the leading and trailing end of the bar code. Each of the UPS 11 subsets uses a unique start code and a common stop code, both automatically provided.

Data Field

UPS 11 is a special case of Code 128 (page 237). This bar code is restricted to 10 data characters. The first character must be 0 through 9 or A through Z. The remaining nine digits must be 0 through 9.

Readable Data

The optional readable data field provides a readable interpretation of the bar code data. It can be printed above or below the bar code symbol.

Check Digit

The modulo-103 check digit is automatically calculated and inserted in the bar code symbol. The check digit verifies accurate scanning. The start code is included in the check digit algorithm.

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