Hand Held Products, Inc. (“Hand Held Products”) reserves the right to make
changes in specifications and other information contained in this document
without prior notice, and the reader should in all cases consult Hand Held
Products to determine whether any such changes have been made. The
information in this publication does not represent a commitment on the part of
Hand Held Products.
Hand Held Products shall not be liable for technical or editorial errors or
omissions contained herein; nor for inciden tal or consequential damages
resulting from the furnishing, performance, or use of this material.
This document contains proprietary information that is protected by copyright. All
rights are reserved. No part of this document may be photocopied, reproduced,
or translated into another language without the prior written consent of Hand
Held Products.
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
FCC Class B Compliance Statement
This equipment has been tested and found to comply with the limits for a Class
B digital device pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
•Consult the dealer or an experienced radio or television technicia n for help.
Caution: Any changes or modifications made to this device that are not
expressly approved by Hand Held Products, Inc. may void the user’s authority
to operate the equipment.
Note: To maintain compliance with FCC Rules and Regulations, cables
connected to this device must be shielded cables, in which the cable
shield wire(s) have been grounded (tied) to the connector shell.
Canadian Notice
This equipment does not exceed the Class B limits for radio noise emissions as
described in the Radio Interference Regulations of the Canadian Department of
Communications.
Le present appareil numerique n’emet pas de bruits radioelectriques depassant
les limites applicables aux appareils numeriques de la classe B prescrites dans
le Reglement sur le brouillage radioelectrique edicte par le ministere des
Communications du Canada.
The CE mark on the product indicates that the system has been tested to and
conforms with the provisions noted within the 89/336/EEC Electromagnetic
Compatibility Directive and the 73/23/EEC Low Voltage Directive.
The CE mark on the product indicates that the system has been tested
to and conforms with the provisions noted within the 89/336/EEC
Electromagnetic Compatibility Directive and the 73/23/EEC Low
Voltage Directive.
For further information please contact:
Hand Held Products, Inc.
Nijverheidsweg 9
5627 BT Eindhoven
The Netherlands
Hand Held Products shall not be liable for use of our product with equipment
(i.e., power supplies, personal computers, etc.) that is not CE marked and does
not comply with the Low Voltage Directive.
SV Series Use with UL-listed Equipment
The SV Series should be used only with printers, applicators, conveyors, etc.
that are UL listed.
Cautions
•Never stare directly into the laser beam.
•Never stare directly at a reflected image of the laser beam.
•Avoid exposure to the laser beam.
•Use of controls or adjustments or performance of procedures other than
those specified herein may result in hazardous radiation exposure.
Laser Beam
The laser beam may be on at any time the Power/Sync LED is illuminated.
The Hand Held Products SV Series of Scanner/Verifiers is a universal system
component that analyzes linear bar code print quality, checks encoded data, and
detects system failures. In its basic mode of operation, an SV unit acts similar to
a normal fixed position scanner by automatically decoding bar codes as they
pass through its laser beam. Additional capabilities, such as performing bar
code verification and operating in synchronous modes make the SV Series
unique.
The SV Series combines state-of-the-art digital signal processor (DSP)
technology, a proprietary high-speed moving beam laser scanner with unique
analog output capability, and flexible I/O and communications capability. This
powerful architecture makes an SV unit an economical Quality Assurance tool
for practically any bar code print, application, or conveyance system.
The SV Series performs practically every accepted method of bar code
verification – ANSI method, traditional method, encoded data format checks, and
laser scanning type analyses. These wide-ranging analysis parameters can be
used to measure bar code quality and detect failure mechanisms for any print
technology.
Bar code quality and encoded data information can be reported th rough the
serial communications port for each code analyzed, so accountability for all
printed bar codes is possible.
An SV Unit’s I/O consists of five programmable output ports, two programmable
display LED’s, and a sync input (with two interface circuit choices). This allows
the unit to be used as a local controller for pausing printers, activating lights,
gating conveyors, etc.
The SV Series is available in different models. All models operate identically, but
the scanner parameters, such as scans per second and focus distance, are
different.
Quick Check® SV Series User’s Guide1 - 1
SV Series Model Specifications
Contact Hand Held Products Technical Support for information on custom and
other models.
SV100SV100HDSV100CSV200-1SV200-2
Analyses/
sec
Scan
Width
Focus
Distance
X dim
(min)
100100100200200
6”
(152mm)
8”
(203mm)6”(152mm)
.0067”
(.17mm)
4.5”
(114mm)
.005”
(.127mm)
10.5”
(267mm)
15”
(381mm)8”(203mm)
.013”
(.33mm)
2.5”
(63.5mm)
.0067”
(.17mm)
1.75”
(44mm)
6”
(152mm)
.005”
(.127mm)
ScanView Software
The recommended setup tool for the SV Series is Hand Held Products’
®
ScanView Windows
menus, plus it offers real time monitoring of bar codes being analyzed. This
program is available from Hand Held Products and authorized Hand Held
Products re-sellers. ScanView can be used to program the SV Series via serial
communication using SV download language. Refer to Chapter 6.
-based software. This program makes SV setup simple via
1 - 2Quick Check® SV Series User’s Guide
2
Control Panel
The control panel displays the reset button, I/O connector, system LEDs, and the
serial port connector.
Reset Button
The Reset button is multifunctional. It may be used to turn off the laser beam,
perform calibration, and reset the ports.
Turn Off Laser Beam
The laser beam may be turned off (therefore turning off the SV unit’s operation)
by holding down the Reset button for a few seconds until the beam turns off.
Pressing the Reset button again will begin normal operation.
Note: There are some modes of operation when the laser beam is on only
during specific scanning times. (See the ~SA command (page 6-23) in
Chapter 6, SV Command Language .) Using the Reset Button for turning
off the system is not recommended in these modes.
Perform Calibration
The reset button is used in the calibration procedures. See "Calibration" on
page 5-4 for details.
Reset Ports
Pressing the Reset button will reset ports to their inactive states. This is useful
in systems where the SV unit is holding a printer in PAUSE mode and the user
desires to clear the pause condition. See "Output Ports" on page 2-4 for details.
I/O Connector
The I/O connector is used for all power and field interconnections. The
connector is a DB 15 male. Pin-outs are shown below:
9 -Reserved
10 -Reserved
11 -GND
12 -+5 VDC power in
13 -Power GND
14 -GND
15 -Output 5
+ 5 VDC Power Input
The SV Series requires + 5 Volts DC, +/- 0.25 Volt. Maximum current
consumption is 1 amp. The voltage input must be connected to pin 12 and the
ground input should be connected to pin 13 on the I/O connector.
The alternate ground pins (3, 11, and 14) may be used for power ground or for
connecting the ground(s) of an external device(s) (such as presence sensors)
that may be powered from a different source than the verifier power input.
Sync Inputs
Utilizing a sync signal is recommended for all applications using hardware (as
opposed to communication) interfaces. (See "SV Command Language" on
page 6-1.) A sync signal is used to synchronize the SV Series to an object, label,
etc. that contains the bar code(s) being analyzed as it passes through the laser
beam. The SV Series should be programmed for the number of bar codes
expected per sync interval. This ensures a robust system that can report all
undetectable bar codes due to printer failure, missing labels, etc., along with
quality and data information on bar codes that are fully or partially decoded.
Two hardware sync inputs are available. Pin 4 is designed to be used with TTL
or open collector inputs. Pins 1 and 2 form a ground isolated input designed to
be used with systems that need separate grounds than the verifier and/or output
a higher voltage level than TTL.
Sync inputs are also available via serial communications.
Hardware sync operation is very flexible due to programmable options. Two
sync modes, edge and envelope, are available. Signal input polarity is also user
programmable.
Please see "SV Command Language" on page 6-1 for more information on the
use of these sync modes.
2 - 2Quick Check® SV Series User’s Guide
Edge Sync Mode
This mode senses a signal transition level of a sync signal as shown below.
Sync sensed here
The illustration above shows the sync operation of an SV unit programmed to
sense the rising edge of a sync signal in edge mode. Each time a rising edge is
sensed, the SV unit does the following:
1. It verifies that at least the number of bar codes expected (programmed)
since receiving the last sync input have been fully decoded. If not, a No
Read condition is internally set for possible reporting through communication
or output activation.
2. It begins a new interval, counting the bar codes analyzed until the next sync
input is received.
3. A serial communication report is transmitted and an output port is updated
per its programmed function each time a bar code is analyzed.
Envelope Sync Mode
This mode senses two transitions (leading and trailing) of the sync signal to
determine when to begin and end the period for determining missing bar codes:
Sync period starts here
Sync period ends here
The illustration above shows the sync operation of an SV unit programmed to
sense the rising voltage edge as the start of a sync period. The SV unit operates
in this mode as follows:
1. Upon receipt of the starting edge of a sync signal, the unit begins counting
the bar codes being scanned and analyzed.
2. A serial communication report is transmitted, and an output port is updated
per its programmed function each time a bar code is analyzed.
Quick Check® SV Series User’s Guide2 - 3
3. Counting ceases upon receipt of the trailing edge of a sync signal. The SV
Series determines that at least the number of bar codes expected
(programmed) during the sync period have been fully decoded. If not, an
internal No Read condition is set for possible reporting through
communication or output activation.
4. The SV unit then waits for the next leading edge of a sync signal to begin
counting codes being scanned and analyzed.
Note: For best performance in either sync mode, mount the SV unit in a location
where a bar code is not in the laser beam when an active edge signal is
received.
Communication Sync Commands
Sync operation can be accomplished through serial communications. Please
see these commands in the SV Command Language Section – System Control
Commands (Chapter 6).
Output Ports
Five programmable output ports are available on I/O connector pins 5, 6, 7, 8,
and 15. Each port can be programmed to activate on practically any combination
of data and analysis parameters (including “good codes”) analyzed by the SV
Series. Port activation logic and parameters are programmed via the output
interface modes and associated commands. See the "Output Mode Selection
Commands - O" on page 6-16 for details.
Each port’s output is an open drain FET (field effect transistor). Therefore, the
port can either be “ON” (sinking current) or “OFF” (no current/open circuit). The
active polarity determines whether the port is “ON” or “OFF” while active. This
type of output circuit is used because it is flexible for field connections.
System Displays
Five LEDs are included on the SV Series back panel.
Power/Sync LED
This LED is illuminated green whenever power is applied to the SV Series. Upon
receipt of any sync input (hardware or serial communications), the LED blinks
yellow for approximately 100 milliseconds.
Calibration LED
This yellow LED indicates calibration status. Please refer to "Calibration" on
page 5-4 for details.
2 - 4Quick Check® SV Series User’s Guide
Read LED
This green LED is illuminated whenever a bar code is being fully decoded.
Indicator LEDs 1 and 2
The two green indicator LEDs are user programmable exactly like the five output
ports. Their functions are intended for use as indicators for specific analysis
results.
A common example is programming LED 1 to illuminate in latch mode whenever
a symbol quality error is detected, while programming LED 2 to illuminate in latch
mode whenever a No Read error is detected.
Quick Check® SV Series User’s Guide2 - 5
2 - 6Quick Check® SV Series User’s Guide
3
Serial Port Connector
The serial port connector is used to interface the SV Series with devices
incorporating RS-232C signal levels. The connector is a DB 9 male.
The serial port can be used for reporting bar code analysis results to a host and
receiving SV Command Language instruction from a host.
Serial Port Specifications
•Baud rate: programmable between 9600 and 115200 baud
•Protocol: Echo back
•Data: 8 bit, no parity, 2 stop bits
•RS-232C compatible
Serial Port Pin-out
PinFunction
2Receive Data (RXD)
3Transmit Data (TXD)
4Data Terminal Ready (DTR)
5Ground
7Request to Send (RTS)
8Clear to Send (CTS)
Serial Port Transmission Format
The following data transmission format is standard in the SV Series. This is the
format used by ScanView software for setup and monitoring of SV Series data.
All parameters analyzed for each bar code scanned are transmitted in the
following order:
YabbccddeeffgghhiijjkklmmnoopqqrsstttuuvwwwxxxxxxxxyyMNzzzzAAAABBB
CCCDDDEEFFGHHIIJJOKLL[bar code data chars]Z
Characters designated ‘a’ through ‘O’ represent values for Parameters analyzed,
which are described below. For more parameter details, see "Parameters
Analyzed" on page 8-4.
Quick Check® SV Series User’s Guide3 - 1
Legal values for each parameter are:
PosCharsParameters
CR (carriage return) character indicates
Y11
start of transmit: ctrl-M; 0x0D
P=PASS Ref Decode, F=FAIL per Ref
Decode algorithm. P and F are a majority
a21
decision over all scans.
00-9A (0-100); Decodability calc. avg.
b32
over all decoded scans
00-9A; Modulation calc. avg. over all
c52
decoded scans
0-9A; Defects calc. avg. over all decoded
d72
scans
00-9A; Edge Contrast calc. avg. over all
e92
decoded scans
0-9A; Rmin/Rmax calc. avg. over all
f112
decoded scans
00-9A; SymbolContrast calc. avg. over all
g132
decoded scans
00-9A; PCS calc. avg. over all decoded
h152
scans
00-9A; R(white) calc. avg. over all
i172
decoded scans
00-9A; R(black) calc. avg. over all
j192
decoded scans
00-99; Ratio calc. avg. over all decoded
scans. Example: 29 represents a ratio of
k212
2.9
+ or - indicating sign of avg. bar deviation
l231
calculation.
Bar deviation calculation averaged over all
decoded scans. Units are % of X. Value:
m242
00-9A (signify 0 – 100)
+ or - indicating sign of avg. min. bar
deviation calculation. + indicates
n261
overprinting, - indicates underprinting.
Minimum bar deviation calculation
averaged over all decoded scans. Units
o272
are in % of X. Value: 00-9A (signify 0 –100)
+ or - indicating sign of avg. max. bar
deviation calculation. + indicates
p291
overprinting, - indicates underprinting.
3 - 2Quick Check® SV Series User’s Guide
PosCharsParameters
q302
r321
s332
t353
u382
v401
w413
x448
y*522
M*541
N551
z564
A604
B643
C673
D703
E732
F752
Maximum bar deviation calculation
averaged over all decoded scans. Units
are in % of X. Value: 00-9A (signify 0 – 100)
One character: Pass(1) or Fail(0). Quiet
Zone. This is a programmable decision
over all decoded scans.
00-9A; Percent decode calc. avg. over all
decoded scans
Absolute X dimension in 0.1 mil (.0001
inch) resolution. Example: a value of 120
represents a 12 mil X dimension.
Overall ANSI method symbol grade
(numeric) Ave over all decoded scans.
Example: 26 = 2.6
Bar code decoding direction: Forwards(0)
or Backwards(1)
000-999; Calculated symbology mod check
value, Code 93 mod check C
8 hex digits; Self check value.
Two digit number identifies the symbology.
See Symbology Identifier Table on page 3-
4 for details.
Digit: 0 = no error, 3 = symbology mod
check error, 4 = subsymbology mod check
error, 1, 2, 6 , or 7 = partial decode error
Digit; 0 = no error, 4 = data match field
length error, 5 = data match and Decrement
error, 6 = data match and increment error,
7 = decrement error, 8 =increment error, 9
= data match error
Four digit number indicates bar code
horizontal position.
Four digit number indicates bar code
vertical position.
Three digit number shows good scans-oncode. (00-9A)
Three digit number shows total scans-oncode.
000-999; Good Quiet Zones (scans)
Two digit number shows Lead QZ. Units:
.1X (00-9A)
Two digit number shows Trail QZ. Units:
.1X (00-9A)
Quick Check® SV Series User’s Guide3 - 3
PosCharsParameters
One digit number: ‘0’ (off), ‘1’ (on). Sync
G771
H782
state.
Two: Units of X dimension times 10.
Two digits; Percent of good global
I802
thresholds. (00-9A)
Two digits; Calculated application
J822
checksum value or Code 93 mod check K
One digit; indicates the subsymbology
enabled in the y field of ~LFxy command for
this symbol. A value of 0 indicates no
O841
K851
L862
[chars]88...
subsymbology check is enabled.
One digits; Dummy value for expansion
Two digits; Dummy value for expansion
Bar code data characters (variable length).
LF(line feed) character indicates end of
Zlast1
transmit; ctrl-J; 0x0A.
y* - The symbology identifiers use groups of numbers to identify each
symbology. The range of possible values could potentially span 100 for each
symbology category. The Symbology Identifier Table lists each identifier group
with the corresponding symbology.
* A no read condition is indicated by all four bytes yy, M and N set to 0 in a
transmission. All other data is therefore not valid.
See the ~OS# command (page 6-17) for other transmission data formats.
ScanView is designed to be a tool used for system setup and real-time bar code
monitoring of a Hand Held Products SV type scanner/verifier. It is a Windows 95/
98/NT/2000 application with facilities for sending commands to the SV scanner/
verifier and receiving the responses. The program can view bar code analysis
results and monitor bar code printing/monitoring sessions. In addition, it can
gather and display an ANSI method scan reflectance profile for a particular
symbol placed in the SV unit’s laser beam scan path. ScanView also streams the
analysis results received from the SV scanner/verifier to data files on hard disk
that can be reviewed by ScanView at a later time.
Note: This chapter refers to ScanView versions 2.08 and higher.
Note: If you are not using ScanView, skip this section and go to Chapter 5.
System Requirements
The following hardware and software is required to use ScanView:
1. A computer running either Windows 95, 98, 2000 or NT.
2. At least one available RS-232 serial port.
3. At least 32 MB RAM.
4. A hard disk with at least 15 MB of free space.
5. A color printer is recommended for users who wish to print analysis results.
ScanView Software Installation
There are two basic steps for installing ScanView. The program must be installed
and a communication port must be set up.
Note: Before installing a new version of ScanView make sure to uninstall
previously installed versions. To do this, select the Windows ‘Start’
button; the ‘Settings’ menu item; the ‘Control Panel’ to display the Control
Panel Window. Double-click on the ’Add/Remove Programs’ icon. The
‘Add/Remove Programs Properties dialog box appears. Click on the
‘Install/Uninstall’ tab. Scroll the list box to locate the ‘ScanView by Hand
Held Products’ item. Select that item and select the ‘Add/Remove’ button
Quick Check® SV Series User’s Guide4 - 1
and follow the displayed instructions. If the previous version of
ScanView was 2.07 or earlier, delete the folder that contains the
remaining ScanView files: ‘c:/Program Files/Hand Held Products/
ScanView by Hand Held Products.’
Note: If you are using a CD-ROM, insert the CD and the system walks you
through the set up. If you are using 3.5 diskettes, follow the steps below.
Follow these steps to install ScanView:
1. Insert ScanView Installation Diskette #1 into a floppy disk drive; e.g., drive A.
2. Select the Windows 'Start' button.
3. Select 'Run...' menu item
4. Type A:\setup.exe.
5. Select ‘OK’ and follow the displayed installation instructions.
At the end of the installation procedure cl ick the ‘Finish’ button to close the
ScanView Installation program. The ScanView Group Window remains, and it
contains the ScanView application icon. The icon label is ‘ScanView.exe’. To
place a shortcut to ScanView on the Windows Desktop, hold down the right
mouse button while dragging the ScanView icon to an open space on the
desktop; then release the right mouse button. A menu will appear. Click on the
‘Create Shortcut(s) Here’ menu item.
Launch the ScanView application by double-clicking on the ScanView icon.
(ScanView can also be launched by clicking the Windows ‘Start’ button, then by
clicking the ‘Programs’ menu item, and finally, by clicking the ScanView submenu item.)
The first time ScanView is launched, a dialog box is displayed that shows all of
the communications ports on the PC in a drop-down list. Select the
communications port that is connected to the SV scanner/verifier.
The initial screen displayed after successful installation is the Bar Code Analysis
Screen. This is shown in page 4-9 and described in the Analysis Screens
section.
PC Communication Port Setup
Connect the null-modem cable between the SV unit and the PC serial com port.
The PC communication port settings must match the ScanView communication
parameter settings. To match the communications port baud rate to the verifier
baud rate, click the Setup item on the application Menu Bar (See "Bar Code
Analysis Screen" on page 4-9). Then click the ‘Match Verifier Baud rat e” me nu
item. ScanView will detect the verifier’s baud rate, and set the port to the
detected value.
4 - 2Quick Check® SV Series User’s Guide
Software Operation Warnings
Do not run other Windows applications run concurrently with ScanView.
ScanView operation depends on communication and timing issues that can be
disrupted when ScanView shares Windows resources with other applications.
The resource sharing problem can include conflicts with Windows screensavers.
ScanView blocks screensaver operation.
This version of ScanView limits the number of processed bar codes to 30,700 per
session. To use ScanView for monitoring larger amounts of bar codes, divide the
job into multiple sessions, each less than 30,700 bar codes.
Title Bar – Screen Display
See "Bar Code Analysis Screen" on page 4-9. The area marked B is the title bar.
The application Title Bar is located at the top of the application window. It shows
the application’s name and the name of the data file that receives the analysis
results generated by the verifier. The title changes to identify the current display
mode.
The Title Bar also includes the standard Windows Minimize, Maximize and
Application Termination buttons.
Menu Bar – Screen Display
See "Bar Code Analysis Screen" on page 4-9. The area marked C is the Menu
Bar. The Menu Bar is located just below the Title Bar. It lists five menu
categories: File, Setup, Advanced, Support and About.
File Menu
This menu controls data file handling functions, printing and application
termination. The format is typical of any Windows type file menu. The files
contain the raw data collected from the SV unit. ScanView can re-ope n thes e
files to re-display the data at a later time. Note: The Print function prints the
current ScanView display on the printer.
Setup Menu
This menu is used to configure the ScanView analysis displays and program the
most common SV scanning and communication parameters.
Select Graphs
This item allows the user to select which bar code analysis parameter graphs are
displayed on the Bar Code Analysis Screen (see "Bar Code Analysis Screen" on
page 4-9.)
Quick Check® SV Series User’s Guide4 - 3
Select Symbologies
This item allows the user to program the SV unit to enable/disable individual
symbology decoders. This is useful for either more secure decoding or
sometimes faster throughput if a single symbology type is always being
analyzed.
Select Com Port
This item allows the user to select a com port in the host PC.
Change Verifier Baud Rate
This item allows the user to program the SV scanner/verifier baud rate.
Match Verifier Baud Rate
This item detects the baud rate of an SV scanner/verifier; then it changes the
ScanView baud rate setting to the detected value. This is useful when using
ScanView as a diagnostic tool in a system that is using the SV communication
interface. ScanView can easily be inserted in the system without re-programming
the SV serial port, therefore when re-connecting the SV unit back to the host, all
communication parameters remain compatible with the host.
Static Codes Mode
This item allows the user to set the SV unit in static codes mode.
Moving Codes Mode
This item allows the user to set the SV unit in moving codes mode.
Data Match
This item opens a dialog box that lets the user configure the Data Match feature.
Minimum Codes Per Sync
This item allows the user to program the minimum number of bar codes expected
in a sync interval. This parameter is important for detecting No Read conditions
when a sync input is being used.
Ladder Mode and Picket Fence Mode
These items allow the user to program the SV unit to scan bar codes traveling in
either “picket fence” or “ladder” direction. “Picket fence” orientation is defined as
the bar code traveling through the laser beam in the direction of the height of its
bars. “Ladder” orientation is defined as the bar code traveling through the laser
beam in the direction of the beam path.
4 - 4Quick Check® SV Series User’s Guide
Note: In cases where the SV is scanning stationary bar codes, the “picket fence”
direction must be used.
Advanced Menu
This menu is an extension of the Setup Menu, providing less commonly used, but
useful SV system features.
Toggle Display Updating
This item enables/disables display updates in real time. Disallowing updates is
useful to allow ScanView to keep up with a high throughput application.
Toggle Additional Results
This item enables/disables additional analysis parameters to be displayed on the
Bottom Panel of the Bar Code Analysis Screen. The additional parameters are
intended for debug use only while working with Hand Held Products’ Technical
Support.
Download New Firmware
This item is used for updating the firmware revision level in an SV scanner/
verifier.
Port Configuration
This item lets the user configure the SV unit output port activation threshold
settings.
Initialize the Com Port
In the unlikely event that some failure causes the Com Port to lock up, this
feature can be used to unlock the port.
Support Menu
This menu provides special diagnostic displays that are intended to be used only
while working with Hand Held Products’ Application Support.
About (Menu Item)
This item lists information about the origin of ScanView, the version number of
this copy (it also queries the SV unit for its firmware version number) and it shows
the copyright warning.
Quick Check® SV Series User’s Guide4 - 5
Speed Button Bar – Screen Display
See "Bar Code Analysis Screen" on page 4-9. The buttons on this bar give quick
access to various application modes and features.
All Data Points, Last 64 Data Points
, Toggles the “all data points” mode and the ‘last 64 data points”
mode. In the ‘last 64 data points” mode, the Graph Display Area (see "Bar Code
Analysis Screen" on page 4-9) is updated immediately as the SV scanner/verifier
processes each bar code. In the “all data points” mode, bar code processing can
continue, but the ScanView display is not updated. The Grade Bar (Color Bar)
is dimmed when in All Data Points mode.
Zoom In
Toggles the Zoom-In mode. First, it switches from Last 64 Data Points
mode (see All Data Points, Last 64 Data Points Section above), to All Data Points
mode (see All Data Points, Last 64 Data Points Section above). To zoom-in, hold
down the left mouse button and drag the mouse-pointer to a desired data point
in the Graph Display Area; Hold down the Ctrl-key when the left mouse button is
released (then release the Ctrl-key.) The plots are stretched to show only half of
the data on each side of the mouse pointer. To zoom further into the data, repeat
this process.
Erase Current Session Data
Erases all of the data in the current session. Also, the data in the
corresponding hard disk files is deleted.
Reflectance Profile
Scan and Display a new Reflectance Profile. (See "Reflectance Profile
Screen" on page 4-12.) The shortcut key for this function is F3.
4 - 6Quick Check® SV Series User’s Guide
Transmit SV Commands
This button invokes a special screen where up to fourteen individua l
commands may be composed and transmitted in any order. Proper use requires
knowledge of the SV download language. See the Chapter 6, SV Download
Language for details. This function is intended for advanced setup involving
special functions not normally accessed by ScanView. These can include special
transmission formats, special commands in a custom SV firmware version or
diagnostic functions used by Hand Held Products’ Application Support and
Service personnel. The shortcut key for this function is F4.
Report an Analysis
Reports a new analysis of any bar code(s) currently in the SV
unit’s beam path. This is most useful in setup where scan distance and
orientation is being finalized. It is also useful when using the SV unit as a
standalone verifier scanning codes being manually placed in the beam by the
user. The shortcut key for this function is the Spacebar.
Modes Of Operation
ScanView operates in two basic modes: Session and Reflectance Profile.
Session Mode
This mode scans, analyzes and provides reports on individual bar codes.
Reporting is accomplished via the Bar Code Analysis Screen (see "Bar Code
Analysis Screen" on page 4-9). The parameters analyzed and many of the
parameters displayed are user programmable
Session Mode is entered by default when the program is initially started. It can
also be entered from the Reflectance Profile Mode by clicking the Return to
Session Mode Speed button (see "Reflectance Profile Screen" on page 4-12.)
The Bar Code Analysis Screen (see "Bar Code Analysis Screen" on page 4-9) is
displayed and analysis from bar codes passing through the SV unit’s beam will
be displayed. In cases where a bar code is statically held in the beam analysis of
the code can be accessed by clicking the Report an Analysis Speed button.
Session Mode Notes
ScanView updates the bar code analysis graphs each time a bar code is
processed by the verifier; but there is a limit to the graph update rate that
ScanView can sustain. Factors that determine the processing load include the
bar code analysis rate (bar codes per second) and the number of displayed
analysis parameter graphs (selected by the user). The Windows
communications facility has a data buffer that allows the graph processing to
‘catch up’ between bursts of transmitted data. If the incoming data volume
Quick Check® SV Series User’s Guide4 - 7
exceeds the application’s processing limit it will lag farther and farther behind
until the buffer overflows and the communications port ceases to operate. If this
condition occurs, port operation can be restored by clicking the Initialize Com
Port item in the Support Menu list. When using ScanView to monitor a printing
session, the user can test for processin g lag du ri n g sh ort samp le ru ns by
intermittently blocking the beam path and noting the resulting analysis graph
update lag. If the apparent lag time is longer when the time between blocking the
beam is longer, then an adjustment is required; either reduce the speed the bar
codes are traveling through the laser beam or change to a ScanView display
mode that requires less graphic processing. (e.g., see "Toggle Display
Updating" on page 4-5 .)
ScanView streams the verifier analysis results directly to data files on hard disk
as the data are received from the verifier. There are two data files: one, contains
the verifier analysis results; the other file contains the date and time when each
bar code was processed (supplied by the PC clock). The two default files are
deleted and a new pair of default files are created each time the ScanView
application is launched. Therefore, the user must rename the files to preserve
session analysis results. To do this, use the ‘Save As’ item in the File Menu.
Enter a filename without a trailing file-type identifi er. ScanView uses that name
to create two files: one, for the session analysis results data (.ses); and the other
for the date/time data (.tim).
When ScanView is launched it exhibits the same configuration it had when it was
last shut down. The configuration parameters that are maintained between
application launches include window position, shap e and the user selected
display mode options. The configuration saving capability extends to selected
application’s dialog boxes that can be repositioned and reshaped by the user.
Reflectance Profile Mode
This mode gathers and displays a scan reflectance profile for the entire scan
path. The profile is displayed with the Reflectance Profile Screen (see
"Reflectance Profile Screen" on page 4-12.) Reflectance Profile Mode is
enabled by clicking the Reflectance Profile Speed button or pressing F3.
Analysis Screens
There are two analysis screens used for setup and monitoring an SV type
scanner/verifier. These are th e Bar Code Analysis Screen and the Reflectance
Profile Screen.
Bar Code Analysis Screen
This screen provides all analysis results for a particular bar code. It also shows
many bar code analysis results over time. An example is shown below. Each
individual parameter analysis result for one bar code is indicated by a dot on a
parameter graph in the Graph Display Area and can be easily accessed via the
mouse.
4 - 8Quick Check® SV Series User’s Guide
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