Hand Held Products IT4800 - Manual (Page 10)

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{5} [A] < Row Height = 3.1 X
{6} [A] < Useful Row Height = 2.5 X (82% Row)
{7} [A] < Data Safety Margin = 100% (0 Erasures & 0
Errors)
{8} [B] < Edge Accuracy = 59%
{9} [C] < Print Growth = -43% of X
where:
{1} is always the Encoded Message, the usual data output. In this case "This
is a representative PDF417 symbol".
{2} is a standard Banner heading that marks the start of the PQA portion of the
output.
{3} identifies the Symbology, PDF417 (or its derivative COMPOSITE-C), and
lists other characteristics of this symbol: the height and width of the data
field, the numbers of data and check characters, and the corresponding
Error Correction Level.
{4} presents an approximate X-dimension, presuming normal viewing dis-
tance.
In the Screening PQA modes, the Symbology Identification from Line {3} is com-
bined with the approximate X-dimension from Line {4}.
Note: The reported X-dimension is approximate and based upon use of the
IT4410LR at 4.7 in (12 cm) (see "Reading Techniques" on page 1-1). If
you use different image engines, the X-dimension will vary. If you hold
the reader closer than 4.7 in (12 cm), it will have the effect of reporting a
larger than true X-dimension. Conversely, if you hold the reader farther
away than 4.7 in (12 cm), it will have the effect of reporting a smaller than
true X-dimension. Please contact HHP Application Support for additional
information. Refer to Chapter 3 for contact information.
{5} lists the average Row Height, assigning the grades as:
A if Row Height >= 2.5 X
F otherwise
In Screening modes, this parameter is reported as "Rows are Too Short (2.2X)"
when that is the case.
{6} lists the Useful Row Height, which is the measured Row Height times the
codeword yield (listed in parentheses), the percentage of symbol characters
scanned that actually decode. The grade is assigned as:
A if Useful Height >= 2.0 X, else
B if Useful Height >= 1.6 X, else
C if Useful Height >= 1.3 X, else