HORITA VS-50 User manual

HORITA VS-50
VIDEO STOP WATCH
USER MANUAL
Doc. 070950
Rev. D
(C) Copyright 2015
P.O. Box 3993, Mission Viejo, CA 92690 [phone] www.horit .com

2
COPYRIGHT
(C) 2015 HORITA CO. All rights reserved
No part of this document may be copied or reproduced in any form or by any means without prior
written consent of HORITA CO., INC., P.O. Box 3993, Mission Viejo, CA 92690.
HORITA CO. INC. makes no warranties with respect to this documentation and disclaims any
warranties of merchantability or fitness for a particular purpose.
HORITA, its logo, and VS-50 are trademarks of HORITA CO., INC.

3
TABLE OF CONTENTS
GENERAL CHAPTER 1
4
FEATURES CHAPTER 2
4
CONNECTING THE VS-50 CHAPTER 3
3.1 Connecting Power 5
3.2 Operating from Battery Power 5
3.3 Connecting Video In and Out 5
Figure 3-1, Basic VS-50 Hookup 5
3.4 Connecting the GPI Output 5
3.5 Connecting the Internal GPI Pullout Resistor 5
OPERATING THE VS-50 CHAPTER 4
6
4.1 VS-50 Mode Flow Diagram Explanation 6
Figure 4.1, VS-50 Flow Mode Diagram 6
4.2 LED Operation 7
4.3 Entering and Exiting the Setup Menus 7
4.4 Selecting Different Menu Items 7
4.5 Changing the Selected Menu Item 7
4.6 “DISPLAY SETUP” Menu 7
4.7 “STOPWATCH SETUP” Menu 8
Table 4.1, Stopwatch Display Formats 9
4.8 “TIME SETUP” Menu 10
Table 4.2, Time Display Formats 11
4.9 “Date SETUP” Menu 11
Table 4.3, Date Display Formats 12/13
4.10 Selecting Titling Mode and Entering and Editing Data 13
4.11 Character Selection 13
Table 4.5, Character Set 13
4.12 Inserting Spaces and Deleting Characters 13
4.13 Centering a Line of Text 13
4.14 Turning the Display Off and On 13
4.15 Split Screen Display 13
4.16 Operating in Local Mode 14
4.17 Operating in Remote Mode 14
4.18 GPI Output Signal Timing Versus Stopwatch Mode 15
Table 4.5, GPI Timing Versus Counter Mode 15
4.19 Remote Control Connector 15
MAINTENANCE CHAPTER 5
16
5.1 Cleaning 16
5.2 Service and Troubleshooting 16
5.3 Adjustments 16
Figure 5-1, Adjustment Locations 17
5.4 Horizontal Size Adjustment 17
5.5 Video Level Adjustment 17
SPECIFICATIONS CHAPTER 6
17

4
1 GENERAL
The VS-50 Video Stopwatch provides an economical means of precisely timing the occurrence of an event relative to
video. The VS-50 has an “onscreen” stopwatch timer that can count up or down and can output a “trigger” signal to start or
stop an event. The stopwatch counter can be operated either locally via front panel switches, or remotely via simple switch
closure inputs to the VS-50 remote control inputs. In addition, the VS-50 has a built in clock/calendar and can display both
time and date in a wide variety of user-selectable display formats, including ones which calculate and display the day of the
week according to the date entered.
The VS-50 also has provision for user entry of up to 9 lines of twenty characters each, for entering video source ID or other
captioning and titling information. All of the VS-50 setup information, operating mode selection, and titling information is
saved in a battery backed up, non-volatile memory, and restored at power up.
The VS-50 finds application in timing talent, speeches, dialogues, etc. triggering events related to video capture, as well as
security situations, documenting laboratory or other types of experiments, as well as simply for displaying time and date
within video images.
2 FEATURES
•Displays Stopwatch, Time, Date, Titling, and operates in local or remote modes with all setup information retained in
non-volatile memory
•Stopwatch display can include tenths and hundredths of a second. Twelve display formats are provided to allow
selection of displays ranging from just seconds to a display of hours, minutes, seconds, tenths and hundredths of a
second. User-selectable time and date video display formats include some which automatically calculate and display
the day of the week
•Stopwatch has four modes of operation: downcounter, downcounter with auto preload, down-up counter, and up
counter.
•Auto preload counter forms an “interval” timer that can output a GPI signal at regular intervals of from one second up
to hours.
•Down-up counter can downcount to zero, output a GPI signal, then count up to display the time following the output
of the GPI signal.
•Simple switch-closure-to-ground remote control inputs allow selection of various counter functions such as counter
mode, preset, reset, start/stop, etc.
•Remote inputs can be selected as either pulse or level signals.
•GPI output can be set to output either a pulse or level signal when the counter reaches zero, on each second, or on each
minute
•Special "split screen" display mode for two smallest vertical sizes insures maximum view of video image by allowing
the user to “split” the 9 line display into 5 lines at the top and 4 at the bottom. The amount of the split is quickly and
easily user adjustable.
•Four separate setup menus for Display, Stopwatch, Time, and Date allow simple and easy user selection of H and V
character size and position, black or white characters, background on/off, time/date on/off, stopwatch mode, GPI
ON/OFF, etc.
•Internal crystal controlled clock/calendar IC has battery back-up to maintain time and date when unit is powered off.
•Operates from a small AC power adapter, which is included, or can be operated in the field from 9-to-14 volts DC
battery power.
•Available in desktop (VS-50), Rackmount (RM-50/VS), Rackmount Add-On (AO-50/VS), or Shortrack (SR-50/VS)
models

5
3 CONNECTING THE VS-50
3.1 Connecting Power
Included with your VS-50 is an AC power adapter that provides a 9 volt, 500 milliamperes DC output. This adapter is
equipped with a miniature phone plug with the "+" (positive) voltage output connected to the front tip of the plug.
Insert the power plug into the VS-50 "+9V POWER" connector and plug the adapter into 110-120 volt, 60-Hz AC power.
WARNING:
ELECTRICALLY OPERATED PRODUCT
As with all electrical products, precautions should be observed during handling and use to prevent electrical shock.
NOTE:
Make sure the plug is inserted all the way into the power connector or else damage to the power adapter may result. The
VS-50 has internal protection circuitry to prevent it from being damaged should the wrong polarity of power be applied.
However, do not use an adapter of more than 9 volts at 500 milliamperes or damage to the VS-50 may result.
3.2 Operating From Battery Power
You can operate your VS-50 from battery power in order to use it in the field as a portable time and date or source ID
inserter.
The VS-50 can be operated from 9-to-14 volts DC, obtained either from a conventional 12 volt video camera battery, or
from a 12 volt battery pack of 8 "AA" or other 1.5 volt batteries.
3.3 Connecting Video In and Out
Figure 3-1 shows a basic hookup for the VS-50 when used with a typical video source and a video recorder or monitor.
Video OUT IN Video
IN Video
SOURCE VS-50
VIDEO REC.
VIDEO
OR MONITOR
GPI OUT
Video OUT
As Required
Figure 3-1, Basic VS-50 Hookup
Connect video from the video source to the BNC connector labeled VIDEO IN on the VS-50. Connect VIDEO OUT from
the VS-50, to downstream video equipment such as video monitors or video recorders, as desired. When the VS-50 is
powered up, the VIDEO IN input is terminated at 75 Ohms. When powered off, video is looped directly from VIDEO IN to
VIDEO OUT, bypassing the VS-50.
3.4 Connecting the GPI Output
The VS-50 GPI output signal can be accessed at either the RCA connector labeled GPI OUT, or on Pin-8 of the REMOTE-
1 connector. Electrically, the VS-50 GPI output is referred to as an “open collector pulldown to ground” type of signal.
This means that the user’s equipment must supply the VS-50 GPI output with a positive voltage that first passes through
the user’s GPI input circuit on his equipment. This circuit will then be activated when the VS-50 GPI output switches to
ground. The VS-50 GPI output will “sink” about 100mA of current, and can operate at up to 30 volts.
To connect to the VS-50 GPI output, use an RCA male connector. The center pin is the VS-50 GPI output, the outside of
the RCA connector is ground and should be connected to the ground side of your equipment. To use the GPI signal at the
REMOTE-1 connector connect to Pin-8 for the GPI signal and to Pin-9 for the ground return.
Using the VS-50 “STOPWATCH SETUP” Menu the GPI signal can be set up to be either a pulse or a logic level change at

6
the GPI event time. The pulse is of a duration of 100mS (0.1 Sec), starting at the programmed time. The logic level GPI
signal simply changes to the opposite level at the programmed GPI time.
3.5 Disconnecting the Internal GPI Pullup Resistor
Although the unit that is receiving the GPI output signal from the VS-50 should supply a positive pullup voltage, the VS-
50 GPI output is connected to an internal pullup resistor to +5 volts. This can be disconnected if desired, as follows:
1. To dis-connect the internal pullup first follow the directions in the Section 5, Maintenance, portion of this manual to gain
access to the inside of your VS-50.
2. Next locate jumper JP1 on the smaller of the two circuit boards (ASSY 100432).
3. Re-connect the shorting jumper across JP1 to just a single JP1 pin for storage.
4. Reassemble your unit.
4 OPERATING THE VS-50
To operate the VS-50 connect video in and out, the GPI output, apply power, and set the POWER switch to ON. A red
LED above the power switch lights when the VS-50 is powered up.
When the VS-50 is initially powered up, it operates in the “Display” mode to display the time, date, and stopwatch values,
along with any user source ID information entered. The POSITION and CHAR switches operate to provide quick and
convenient control of the display’s horizontal and vertical position, without going through any “menu” operations.
Actuating the MODE switch selects between the setup menus, display, and titling modes
4.1 VS-50 Mode Flow Diagram Explanation
The following figure shows how the VS-50 modes change as the SETUP switch is actuated to DISPLAY and SETUP.
= Toward DISPLAY = Toward SETUP
Insert/Del
Insert/Del Title
Title Diplay Off
Display Off Run
Stop
Rem Run/Stop Power Up Preset/Reset
Setup Menu Setup Menu
Remote Mode Local Mode
Figure 4.1 VS-50 Mode Flow Diagram
When first powered up, the VS-50 enters the Display mode. If in Local mode of operation, the Stopwatch is stopped. If in
Remote mode, the stopwatch operates according to the signals applied to the Remote connectors.
Actuating the MODE switch to SETUP causes the VS-50 to enter the SETUP mode and display the last Setup Menu and
Item selected before the VS-50 was powered down. Further actuating of the MODE switch to SETUP causes the VS-50 to

7
cycle through its four setup menus.
Actuating the MODE switch to DISPLAY when in SETUP mode causes the VS-50 to enter the DISPLAY mode. If
operating in the Local mode, the Stopwatch will be set to its Preset or Reset value, depending whether a down or up count
stopwatch mode is selected.
4.2 LED Operation
The front panel LED blinks at different rates to provide indication of VS-50 operation.
LED CONDITION MEANING
Off Power off
Steady on Display mode
Very slow blink, 1-sec. on/off No video
Slow blink, .5-sec. on/off Display data entry/Setup mode
Fast blink, .25-sec. on/off Display data edit mode
4.3 Entering and Exiting the Setup Menus
The setup menus allows selection of various character attributes such as black or white characters, time, date, and
stopwatch display formats, stopwatch operating modes, etc.
Some selections, for example black or white characters, affect the setup menu display so you can see their immediate
effect. Other selections, for example character size, produce their effect after the setup menu is exited.
To display the setup menus, toggle the MODE switch to SETUP and release. Depending on the actual mode that the VS-50
is operating in, you may have to toggle the switch several times to enter a setup menu. The initial setup menu selected and
displayed is the one that was used last.
The selected item on the setup menu is indicated by its “flashing” on and off. In the setup mode, the POSITION and CHAR
switches serve to select and change menu items.
To exit the setup mode, actuate the MODE switch to DISPLAY and release.
4.4 Selecting Different Setup Menu Items
Menu items are selected via the POSITION switch. Flashing of the menu selection moves on to the next item each time
the POSITION switch is actuated and released. Actuating the switch down causes the selection to move to the right and
down, actuating the switch up causes the reverse action. Holding the POSITION switch actuated causes quick scanning
through the menu items.
4.5 Changing the Selected Menu Item
After a menu item is selected, the choices available for that item are accessed via the CHAR switch. Actuating the CHAR
switch down or up scans forward or backward through the choices available. Holding the switch actuated causes automatic
scanning through the choices. The setup menu items, functions, and selections available are described for each of the setup
menus in the following paragraphs.
:
4.6 “DISPLAY SETUP” Menu
A typical DISPLAY SETUP menu appears on the VS-50 screen as follows:
*DISPLAY SETUP*
CHAR COLOR BLACK
BACKGROUND ON
CONTRAST HIGH
SIZE H-1X V-2S
POSITION H-18 V-28
LABEL LINES 1-9 OFF
CLR SCR:N SYS RST:N

8
VER 132 NTSC
The following paragraphs provide a detailed explanation of each of the DISPLAY SETUP menu items
ITEM FUNCTION SELECTIONS
CHAR Character color BLACK = black characters
COLOR WHITE = white characters
This attribute takes effect immediately and also changes the setup screen display.
BACK- Character background ON = background on
GROUND OFF = background off
This attribute takes effect immediately and also changes the setup screen display.
CONTRAST Character contrast HIGH = high contrast
MED = medium contrast
LOW = low contrast
This attribute takes effect immediately and also changes the setup screen display.
SIZE H- (Horizontal) 1X = 1 times (2.1 H pixels)
2X = 2 times (4.2 H pixels)
3X = 3 times (5.6 H pixels)
4X = 4 times (8.4 H pixels)
V- (Vertical) 1S = 1 split (7 H lines)
2S = 2 split (14 H lines)
3X = 3 times (28 H lines)
4X = 4 times (42 H lines)
POSITION H- (Horizontal) 00-63 Numerical reference
V- (Vertical) 00-80 (1S), 00-40 (2S)
00-63 (3X, 4X) Numerical
reference
CLEAR Clears screen ON = clear screen
SCREEN OFF = clear screen complete
LABEL Labels each line ON = label screen lines
LINES 1-9 on screen OFF = un-label screen lines
Labeling of the lines is used to help locate where to put text on the screen or to help in placing the Stopwatch, Time, or
Date displays.
SYSTEM Resets system ON = system reset
RESET OFF = system reset complete
System Reset initializes the VS-50 to a basic display of Stopwatch, Time, and Date
4.7 “STOPWATCH SETUP” Menu
A typical STOPWATCH SETUP menu appears on the VS-50 screen as follows:
*STOPWATCH SETUP*
COUNTER 00:05:00
DISPLAY OFF
START POSITION 100
FORMAT 01
HH:MM:SS.TH
FLASH AT ZERO OFF
CONTROL REM PUL
GPI PUL ON ZRO

9
The following paragraphs provide a detailed explanation of each of the STOPWATCH SETUP menu items
ITEM FUNCTION SELECTIONS
COUNTER Unformatted counter HH:MM:SS
display and counter HH = 00-99 Hours
preset value MM = 00-59 Minutes
SS = 00-59 Seconds
DISPLAY Turns display ON = display ON
ON and OFF OFF = display OFF
NOTE:
The COUNTER HH:MM:SS and the DISPLAY ON/OFF fields can only be accessed by the POSITION switch when in
Local (LOC) mode and then only by moving the cursor up the screen to the desired fields.
START Starting character position 001-180 001 is upper right
POSITION of formatted stopwatch 180 is lower left
display
NOTE:
When the starting position of the Stopwatch display is changed via actuating the CHAR switch while the “START
POSITION” menu item is selected, the prior display screen is immediately restored. Further actuation of the CHAR switch
moves the starting position of the Stopwatch display character by character in a serpentine fashion so that you can observe
its actual position within your normal video display. There are 20 character positions available on each of the 9 lines.
Character “001” is located at the upper left of the screen; character “180” is located at the lower of the right screen. It is
also helpful to use the “LABEL LINES 1-9” function to help see where the Stopwatch is displayed as its starting position
on the screen is changed. Even though the Stopwatch display “erases” any text that was on the screen as it is moved, the
text can be restored simply by actuating the MODE switch to SETUP, then back to DISPLAY.
ITEM FUNCTION SELECTIONS
FORMAT Selects format for 01-12
stopwatch display
The display formats for the Stopwatch are shown in Table 4.2. Note that the actual text shown in the table (HH, MM, etc.)
is displayed on the STOPWATCH SETUP menu so that you can select the type of display desired. When the Stopwatch is
displayed on the screen, the actual counter values are displayed.
FORMAT # DISPLAY MEANING
01 HH:MM:SS.TH Hours, Minutes, Seconds,
Tenths, and Hundredths of a
second
02 MM:SS.TH
03 SS.TH
04 HH:MM:SS.T
05 MM:SS.T
06 SS.T
07 HH:MM:SS
08 MM:SS
09 SS
10 HH:MM
11 HH
12 MM
Table 4.1, Stopwatch Display Formats

10
ITEM FUNCTION SELECTIONS
FLASH Enables “flashing” of ON= flash
AT ZERO counter display when OFF = don’t flash
down counting and zero
is reached
CONTROL Selects Local mode and DWN = down counter, counts
LOC stopwatch counter down to zero from preset value
operation Stops when zero is reached
AUT = down counter, counts
down from preset value until
zero is reached, then reloads
preset value and counts down
again. Operates continuously
in this manner.
DUP = down-up counter,
counts down to zero from
preset value then counts up
when zero is reached.
UP = up counter, counts up
from zero.
REM Selects Remote control
PUL = selects pulse type control
for RUN, REVERSE, OFF,
and LAP remote inputs.
LEV = selects level type control
for RUN, REVERSE, OFF, and
LAP remote inputs.
4.8 “TIME SETUP” Menu
A typical TIME SETUP menu appears on the VS-50 screen as follows:
*TIME SETUP*
TIME HH:MM:SS
DISPLAY ON
START POSITION 130
FORMAT 01
09:30 AM
The following paragraphs provide a detailed explanation of each of the TIME SETUP menu items
ITEM FUNCTION SELECTIONS
TIME Unformatted time HH:MM:SS.TH
display HH = 00-99 Hours
MM = 00-59 Minutes
SS = 00-59 Seconds
NOTE:
The TIME value can be accessed for setting by using the POSITION switch to move the cursor up the screen into the
desired HH, MM, or SS fields.
DISPLAY Turns display ON = display ON
ON and OFF OFF = display OFF
START Starting character 001-180 001 is upper left hand

11
POSITION position of formatted display corner of screen, 180
time is lower right hand corner
NOTE:
When the starting position of the Time display is changed via actuating the CHAR switch while the “START POSITION”
menu item is selected, the prior display screen is immediately restored. Further actuation of the CHAR switch moves the
starting position of the Time display character by character in a serpentine fashion so that you can observe its actual
position within your normal video display There are 20 character positions available on each of the 9 lines. Character
“001” is located at the upper left of the screen; character “180” is located at the lower right of the screen. It is also helpful
to use the “LABEL LINES 1-9” function to help see where the Time is displayed as its starting position on the screen is
changed. Even though the Time display “erases” any text that was on the screen as it is moved, the text can be restored
simply by actuating the MODE switch to SETUP, then back to DISPLAY.
ITEM FUNCTION SELECTIONS
FORMAT Selects format for 01-36 selects one of 36 formats
time display for displaying the time. After
the first ten formats, the basic
pattern repeats, but with different
separator characters between the
time digits.
Table 4.2 shows the first 9 time display formats which use a colon “:” as the separator character.
FORMAT # DISPLAY MEANING
01 13:02 24 hour H:M
02 13:02:36 24 hour H:M:S
03 13:02:36.7 24 hour H:M:S.1S
04 1:02 PM 12 hour H:M AM/PM
05 1:02:36 PM 12 hour H:M:S AM/PM
06 1:02:36.7 PM 12 hour H:M:S.1S AM/PM
07 02:36.7 No hours M:S.1S
08 27:24 .5H:S ½ hour downcounter
09 57:24 H:S 1 hour downcounter
10-to-18 Period “.” separator.
19-to-27 Blank (transparent) separator
28-to-36 No separator except for a period
whenever tenth of a second is
displayed, and a space between
Table 4.2, Time Display Formats
4.9 “DATE SETUP” Menu
A typical DATE SETUP menu appears on the VS-50 screen as follows:
*DATE SETUP*
DATE MM-DD-YY
DISPLAY ON
START POSITION 140
FORMAT 01
JAN 6 / 1999
The following paragraphs provide an explanation of each of the DATE SETUP menu items
ITEM FUNCTION SELECTIONS
DATE Unformatted date MM-DD-YY
display MM = 00-12 Months
DD = 00-31 Days
YY = 00-99 Years

12
NOTE
The Date value can be accessed for setting by using the POSITION switch to move the cursor up the screen into the DATE
MM-DD-YY year fields.
ITEM FUNCTION SELECTIONS
DISPLAY Turns display ON = display ON
ON and OFF OFF = display OFF
START Starting character 001-180 001 is upper left hand
POSITION position of formatted date display corner
of screen, 180 is lower right
hand corner
NOTE:
When the starting position of the Date display is changed via actuating the CHAR switch while the “START POSITION”
menu item is selected, the prior display screen is immediately restored. Further actuation of the CHAR switch moves the
starting position of the Date display character by character in a serpentine fashion so that you can observe its actual
position within your normal video display There are 20 character positions available on each of the 9 lines. Character
“001” is located at the upper left of the screen; character “180” is located at the lower right of the screen. It is also helpful
to use the “LABEL LINES 1-9” function to help see where the Date is displayed as its starting position on the screen is
changed. Even though the Date display “erases” any text that was on the screen as it is moved, the text can be restored
simply by actuating the MODE switch to SETUP, then back to DISPLAY.
ITEM FUNCTION SELECTIONS
FORMAT Selects format for 01-60 selects one of 60 formats
date display for displaying the date. After
the first twelve formats, the basic
pattern repeats, but with different
separator characters between the time
digits.
The following nomenclature is used to describe the date format:
mm numeric month value (01-12)
dd numeric day value (01-31)
yy numeric year value (00-99)
cc numeric century value (19-20)
MMM month abbrv (JAN,FEB,MAR,etc.)
DAY day-of-week abbrv (SUN,MON,TUE,etc.)
Table 4.3 shows the first 12 date display formats which use a slash “/” as the separator character:
FORMAT # DISPLAY
01 mm/dd
02 mm/yy
03 mm/dd/yy
04 MMM/dd/yy
05 MMM/dd/ccyy
06 DDD/MMM/dd
07 DDD/MMM/dd/yy
08 DDD/MMM/dd/ccyy
09 dd/MMM
10 dd/mm/yy
11 dd/MMM/yy
12 yy/mm/dd
13-to-24 Hyphen “-“ separator.
25-to-36 Period “.” separator.
37-to-48 Blank (transparent) separator.

13
49-to-60 No separator
Table 4.3, Date Display Formats
4.10 Selecting Titling Mode and Entering and Editing Data
To enter source ID information, actuate the MODE switch to DISPLAY and release until the front panel LED flashes at
about once per second and the screen displays a flashing cursor which shows the position of where the next character will
be entered.
4.11 Character Selection
Use the POSITION and CHAR switches to move the cursor and select the desired characters for entry as shown in Table
4.1. A blank (transparent) character is available between each grouping, and the numeric characters can be quickly
accessed by scanning in the reverse (PREV) direction.
Table 4.4, Character Set
4.12 Inserting Spaces and Deleting
Characters
Actuating the MODE switch to DISPLAY when in the Titling mode places the VS-50 into the Insert/Delete mode. In this
mode both the cursor and LED flash rapidly.
The POSITION switch is used to move the cursor to a desired line or character. Actuating the CHAR switch to PREV
deletes the character under the cursor and pulls the remainder of the line to the left. Actuating the CHAR switch to NEXT
inserts a space under the cursor and moves the line to the right.
4.13 Centering a Line of Text
The Insert/Delete mode is convenient for centering a line of text once entered. First, enter the text desired on each line,
starting at the left of the screen. After the desired text is entered, switch to the Insert/Delete mode, position the cursor at
the start of the line, and insert (or delete) spaces until the line of text is centered or placed where desired.
4.14 Turning the Display Off and On
When the MODE switch is first actuated to DISPLAY after the VS-50 is displaying the normal stopwatch, time, date, and
titles, the display is turned off. If actuated to SETUP, the VS-50 display is turned back on. In this manner the VS-50
display can be quickly switched on and off from the front panel switches.
4.15 Split Screen Display
The “split screen” type of display is selected by choosing the “1S” or “2S” mode for the vertical size when in the
DISPLAY SETUP menu. The split screen mode splits the nine display lines into 5 lines that move towards the top of the
screen, and 4 lines that move towards the bottom.
When split screen is selected, the amount of the vertical split is continuously adjustable, either by changing the value of the
vertical position when in the DISPLAY SETUP mode, or by operating the front panel POSITION switch when in the
normal display mode. In split screen mode, changing the vertical position value increases or decreases the amount of the
vertical split, rather than moving the display vertically, as it does when 3X or 4X vertical size is selected.

14
With this arrangement, you can place data on line-1 and line-9 and it will just barely be visible (if at all) on most standard
monitors when the screen is split to its maximum value
4.16 Operating in Local Mode
1. Select LOC in the STOPWATCH SETUP menu CONTROL item.
NOTE:
When LOC (Local) mode is selected, Remote operation is disabled. None of the Remote input signals will affect operation
of the VS-50.
2. Go to the next menu item and select the desired DWN, AUT, DUP, or UP type of stopwatch counter.
3. Set a preset value for the counter if a DWN, AUT, or DUP counter is selected. Access the counter preset by moving the
cursor on the STOPWATCH SETUP menu up the menu items until it enters the seconds of the counter display. Then
use the NEXT/PREV functions to change the counter seconds value. Do this for the other digits as desired.
4. Set up desired GPI output signal
5. Activate the MODE switch to DISPLAY to exit the Setup menu and display the Stopwatch counter. The counter will be
stopped at this time
6. Activate the MODE switch to DISPLAY one more time and the Stopwatch will start counting.
7. To stop counting, activate the MODE switch back to SETUP one time
8. To reset or preset the counter and start over, activate the MODE switch to SETUP one more time.
9. To turn the display off, activate the MODE switch to DISPLAY one more time when the counter is running.
10. To enter titles on the screen, actuate the MODE switch to DISPLAY one more time after the display has switched off.
The display will come back on with the flashing cursor, indicating the titling data entry mode.
It is helpful to use the LABEL LINES 1-9 function to assist in locating on which line your text, stopwatch, time, or date
displays will be placed.
4.17 Operating in Remote Mode
1. Select REM in the STOPWATCH SETUP menu CONTROL Item.
NOTE:
When REM mode is selected, local operation of the counter via the front panel MODE switch is disabled. Also, local
operation to preset the counter and turn the display on and off when in the STOPWATCH SETUP menu, is disabled.
2. Go to the next menu item and select PUL to operate the RUN, REV, OFF, and LAP inputs with a pulse input from a
momentary switch closure to ground, such as from a pushbutton switch. Select LEV to operate these inputs with a
steady state type of input, such as from a toggle switch.
3. Use the remote PRESET SEC, PRESET MIN, and PRESET HRS inputs to preset the individual digits of the counter as
desired. Each actuation at a preset input advances the digit value by +1 count. If the PRESET NEG MINUS input is
grounded, each actuation of a preset input advances the digit value by –1 count.
Holding a preset input to ground for greater than 2 seconds causes the counter digit to quickly advance +/- automatically.
Note that this preset value is retained in the VS-50 and is used to preset the Stopwatch counter whenever the
PRESET/DOWN input is activated.
4. Use the Remote inputs to select the desired DWN, AUT, DUP, or UP type of Stopwatch counter as follows:
Counter Type Remote Input Use
Down Counter PRESET Use to set counter to preset value
RUN Use to start and stop counter

15
Auto Reload Down AUTO Connect to Ground
Counter RUN Use to start and stop the counter
Down/Up Counter DWN/UP Connect to Ground
RUN Use to start and stop the counter
Up Counter RESET Use to set counter to zero value
RUN Use to start and stop the counter
5. Set up desired GPI output signal.
4.18 GPI Output Signal Timing Versus Stopwatch Mode
The GPI output signal can be set to be either a pulse or a level at the selected GPI event time. If a GPI Pulse is selected, the
GPI output will pull down to ground for 100mS (milliseconds) at the GPI time. If a GPI Level is selected, the GPI output
signal will change from its present level to the opposite level at the GPI event time. The GPI output signal is ended
whenever the counter is preset or reset. The following table shows the relationship of the GPI timing versus the Stopwatch
counter mode
Stopwatch Mode GPI Selection GPI Output Signal Action
DWN (down counter) ON ZRO When counter reaches zero
ON SEC On each second and on zero
ON MIN On each minute and on zero
AUT (auto reload) ON ZRO Each time counter reaches
zero
ON SEC On each second and on zero
ON MIN On each minute and on zero
DUP (down/up) ON ZRO When counter reaches zero
ON SEC On each second and on zero
ON MIN On each minute and on zero
UP (up counter) ON ZRO None
ON SEC On each second
ON MIN On each minute
Table 4.5, GPI Timing Versus Counter Mode
4.19 Remote Control Connector
Remote control of the VS-50 is by way of two DB9 connectors labeled REMOTE-1 and REMOTE-2.
REMOTE-1
Pin No. Name Type Function
1 RESET/UP LEVEL Reset counter to zero, set “up
counter” mode
2 PRESET/DWN LEVEL Set counter to preset value
set “down counter” mode.
3 RUN PUL/LEV Start/Stop counter
4 REV PUL/LEV Change count direction
5 OFF PUL/LEV Turn display off/on
6 LAP PUL/LEV Lap display on/off
7 STR-STP-SET PUL/LVL Single switch to Start-Stop-Reset/Preset the counter
8 GPI OUT PUL/LEV GPI output signal
9 GND Signal ground

16
REMOTE-2
Pin No. Name Type Function
1 AUTO LEVEL Sets “auto reload down
counter” mode
2 Not Used
3 Not Used
4 DWN/UP LEVEL Sets “down-up counter”
mode.
5 PRESET NEG LEVEL Preset in negative (minus)
direction
6 PRESET SEC PUL/LEV Preset seconds
7 PRESET MIN PUL/LEV Preset minutes
8 PRESET HRS PUL/LEV Preset hours
9 GND Signal ground
5 . MAINTENANCE
5.1 Cleaning
1. Do not attempt to disassemble your VS-50 to clean it.
2. Clean your VS-50 using only a damp cloth.
3. NEVER use water or solvents such as alcohol, window cleaner, etc., to clean your VS-50.
5.2 Service and Troubleshooting
If you suspect your VS-50 is not operating properly, check the following:
1. Check all coaxial cables for opens or shorts.
2. If using an AC power adapter different from the one supplied with the VS-50, make sure it supplies the VS-50 with at
least 9 volts (maximum of 14 volts) when the VS-50 is switched on.
You may return your VS-50 to HORITA for service. Please contact HORITA first, either by phone or mail, before
returning your unit.
5.3 Adjustments
NOTE:
Remove power from your unit before performing the following adjustments
Adjustments are provided for video level and horizontal size. To access the adjustments, remove the bottom cover from the
VS-50 by removing the two screws from the front panel and then sliding the bottom cover out towards the front.
If you have a Rackmount or Shortrack packaged VS-50, remove the four screws from the top cover and remove the cover.
All adjustments are located on the circuit board as shown in Figure 5-1.

17
LEVEL
H SIZE
+
+
R23
VID
C25
EQ
R20
Figure 5-1, Adjustment Locations
5.4 Horizontal Size Adjustment
1. Apply power to your unit and adjust H-SIZE control for the desired horizontal size.
5.5 Video Level Adjustment
1. Connect a 1-volt P-P video signal to VIDEO IN and a waveform monitor or oscilloscope to VIDEO OUT. Make sure
the video output is terminated.
2. Adjust the LEVEL control for a 1-volt P-P output (unity gain).
6 SPECIFICATIONS
Power
Operation 9-to-14V DC, 250 milliamperes
Connector 3.5 MM mini phone jack
AC Adapter 9 volt, 500 milliamperes
Connectors
VIDEO IN
VIDEO OUT BNC-1V P-P composite video
GPI Out RCA-Transistor open collector
pulldown to ground. 2N3904,
Maximum I = 100mA.
Maximum V = +30 volts
REMOTE-1 DB9
1 RESET/UP Reset counter , set up counter
2 PRESET/DWN Preset counter, set down counter
3 RUN Start/Stop counter
4 REV Change count direction
5 OFF Turn display off/on
6 LAP Lap display on/offp
7 Not Used
8 GPI OUT GPI output signal (same as RCA)
9 GND Signal ground
REMOTE-2 DB9
1 AUTO Set down-up counter
2 Not Used

18
3 Not Used
4 DWN/UP Set auto reload down counter
5 PRESET NEG Preset negative (minus) direction
6 PRESET SEC Preset seconds
7 PRESET MIN Preset minutes
8 PRESET HRS Preset hours
9 GND Signal ground
POWER 3.5MM Mini Phone
Switches And Controls
POWER ON/OFF Toggle switch with red LED above
MODE
POSITION
CHAR Momentary toggle switches
Environment
Operating 5C to 40C (41F to 104F)
Storage -10C to 60C (14F to 140F)
Dimensions
1.75"H, 3.5"W, 4.5"D
Weight
Approximately 13 Oz. (shipping weight approximately. 29 Oz. including power adapter)
Specifications subject to change without notice

19