ID-08 / ID-09 High Performance Imager – User´s Manual
A-51
Appendices
Delimited
— A delimited command or field is bracketed by predefined characters.
Decode Rate
— The number of good reads per second ahieved by a reader.
Darkfield Illumination
— Lighting of objects, surfaces, or particles at very shallow or low
angles, so that light does not directly enter a reader’s optical hardware.
Depth-of-Field
— The in-focus range of a reader. Measured from the distance behind an
object to the distance in front of the object with all objects appearing in focus.
Diffused Lighting
— Scattered soft lighting from a wide variety of angles used to eliminate
shadows and specular glints from profiled, highly reflective surfaces.
Digital-to-Analog Converter (DAC)
— A
VLSI
circuit used to convert digitally processed
images to analog for display on a monitor.
Digital Signal Processor
(DSP)
— A
VLSI
chip designed for ultra-high-speed arithmetic
processing.
Discrete I/O
— Inputs and outputs characterized by discrete signal transitions from one
voltage level to another so that digital switching can occur.
Direct Memory Access (DMA)
— A capability provided by some computer bus architectures
that allows data to be sent directly to memory from an attached device.
DSP
— See
Digital Signal Processor
.
EPROM
— See
Erasable Programmable Read-Only Memory
.
Embedded Memory
— Onboard memory device such as
EPROM
or flash.
End of Read Cycle
— The time or condition at which the reader stops expecting symbol
information to decode.
Erasable Programmable Read-Only Memory (EPROM)
— A memory chip that retains
data when its power supply is turned off; “non-volatile memory”.
External Edge
— Allows a read cycle to be initiated by a trigger signal from an object
detector when it detects the appearance of an object (rising edge). The read cycle ends
with a good read, a timeout, or a new trigger.
External Level
— Allows a read cycle to be initiated by a trigger signal from an object
detector. The read cycle ends when the object moves out of the detector’s range.
Falling Edge
— A change of state (to inactive) associated with a level trigger.
Field-Programmable Gate Array (FPGA)
— A semiconductor device containing programmable
interconnects and logic components.
Firmware
— Software hard-coded in non-volatile memory (
ROM
), and closely tied to
specific pieces of hardware.
Fixed Symbol Length
— Increases data integrity by ensuring that only a symbol length
will be accepted.
Focal Distance
— In optics, the distance from the lens to the focal plane.
Focal Plane
— Usually found at the image sensor, it is a plane perpendicular to the lens
axis at the point of focus (–).
Focus
— Any given point in an image at which light converges; the focal point.
FPGA
— See
Field-Programmable Gate Array
.
Full Duplex
— A communications system in which signals can travel simultaneously
between devices.
Summary of Contents for ID-08
Page 1: ...ID 08 ID 09 Handheld Reader User s Manual ID 08 ID 09 User s Manual ...
Page 38: ...3 4 ID 08 ID 09 High Performance Imager User s Manual ...
Page 42: ...3 8 ID 08 ID 09 High Performance Imager User s Manual ...
Page 58: ...4 16 ID 08 ID 09 High Performance Imager User s Manual Text Command Timeout ...
Page 70: ...5 12 ID 08 ID 09 High Performance Imager User s Manual ...
Page 100: ...7 10 ID 08 ID 09 High Performance Imager User s Manual Image Quality ...
Page 114: ...9 8 ID 08 ID 09 High Performance Imager User s Manual Terminal Dropdown Menu ...