OB2-PBA-4

ScoreTronics, Inc., 1110 Jorie Blvd., Suite 104, Oak Brook, IL 60523 Phone 630-571-1970 www.scoretronics.com *Patent Pending PBA-4 Portable Baseball/Softball Scoreboard Owner’s Manual ScoreTronics PBA-4 Portable Baseball/Softball Owner’s Manual Page 1  ScoreTronics, Inc., 1110 Jorie Blvd., Suite 104, Oak Brook, IL 60523 Phone 630-571-1970 www.scoretronics.com Turning the Scoreboard On To turn the scoreboard on, press the green button on the top of the scoreboard.The remote control is always ready for use. It has no power switch. Power On Self Check When the scoreboard first turns on, it will go through a self check. All digits anddots will turn ON for two seconds, then turn OFF for two seconds, and then resetto zero score, first inning, no balls, strikes or outs. If the batteries are sensed low,the scores will flash “LO” “BA” at the end of the self check. Turning the Scoreboard Off To turn the scoreboard off, press and hold down the PWR OFF button on theremote control for TWO SECONDS. The scoreboard will also automatically turnoff after 30 minutes of non-use. The scores will display “PO” “PO” for twoseconds to indicate that it is powering down. Setting Up the Scoreboard at the Field Slide the scoreboard over the installed steel pipe. The pipe will insert about nineinches up into the scoreboard. Then rotate the scoreboard until the locating pininside the unit drops into the notch in the top of the pipe. This will hold thescoreboard facing the proper direction.Your scoreboard is designed to withstand occasional rain showers. However, it isintended to be stored away when not in use and not be permanently mountedoutdoors. The materials used in your scoreboard will age prematurely if thescoreboard is continuously exposed to sunlight when not in use. Using the Scoreboard To advance the score, inning, balls, strikes or outs, simply press thecorresponding button on the remote control. ScoreTronics PBA-4 Portable Baseball/Softball Owner’s Manual Page 2  ScoreTronics, Inc., 1110 Jorie Blvd., Suite 104, Oak Brook, IL 60523 Phone 630-571-1970 www.scoretronics.com The balls and strikes will automatically return to zero when you advance past thethird ball or second strike. The outs will return to zero when advancing past thesecond out. The inning will indicate “0” when advancing to inning 10 and showthe last digit for innings above 10.To clear any item, press the CLR ITEM on the remote control, then press the itemyou wish to clear. When cleared, the scores, balls, strikes, or outs will reset to 0and the inning will reset to 1.If the batteries are getting low, the scores will momentarily flash “LO” “BA” whenthe scores or inning are changed. The batteries should be replaced soon whenthis indication occurs to maintain reliable operation. Radio System The range of the remote control is over 500 feet in open field conditions (noobstructions). However, obstructions such as fences and people, and outsideinterference will reduce this range.Radio dead spots (a spot where the scoreboard won’t respond to the remote) canoccur in some fields. This is normal. The usual solution is to step a few feet inany direction away from that spot. Batteries The scoreboard uses 16 AA alkaline batteries which are included and pre-installed in your unit. The expected life of these batteries under normal conditionsis 500 hours (200 2-1/2 hour games).The unit has a low battery detection system that will flash “LO” “BA” whenchanging the score or inning if the batteries are low. However, to preventinconvenience to the users, it is best to replace the batteries every one or twoseasons.To replace the batteries in the scoreboard, the front panel must be removed.Using a Phillips screwdriver, remove the screws around the edge of the frontpanel and lift out the front panel. The batteries are in two holders just below thescore digits. Observe the polarity markings in the holders when installing the newbatteries. Name brand batteries are recommended. Before reinstalling the frontpanel, clean the inside of the panel with a soft cloth to remove any accumulated ScoreTronics PBA-4 Portable Baseball/Softball Owner’s Manual Page 3  ScoreTronics, Inc., 1110 Jorie Blvd., Suite 104, Oak Brook, IL 60523 Phone 630-571-1970 www.scoretronics.com dust. Use caution when tightening the screws when re-installing the front panel,as they can be stripped by overtightening.The remote control uses a 9 volt alkaline battery which is also included and pre-installed in your unit. The expected life of this battery under normalcircumstances is over 5 years. Make sure to store the remote control in a placewhere the buttons are not depressed, for this will drain the battery in a few days.The battery is accessed by sliding the bottom part of the back (the part with theFCC label) down. Be sure to observe the polarity indication when installing thebattery. Troubleshooting The remote control doesn’t work or range is limited. 1. Make sure that the battery in the remote hasn’t been drained bystoring it with the buttons pressed. Try a new battery in the remotecontrol.2. There could be radio interference at this field. The most commonsource for interference is a cable TV line nearby that is “leaking” its signalinto the air. It is illegal for cable signals to “leak” into the air. If there arenearby cable TV lines, call the cable company and ask them to checkthem for signal leakage.3. If there are a few specific areas, typically two feet in diameter, wherethe remote control won’t work, this is a normal and unavoidable conditionin certain fields. It is caused by signal reflections off of nearby metalobjects. When this occurs, simply step a few feet away from the spot. There are missing segments in the score or inning digits, or some dotsaren’t flipping. 1. The batteries in the scoreboard could be low. Try installing a new setof batteries.2. There could be something …

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OB2-PBA-4 Circuit Description & Schematic 1/17/99 Power Supplies Power enters the board from 16 AA batteries in series (nominal 24 volts) and is filtered by C4. The 24 volts is fed into a low power regulator U5, and to a high current regulator U4. U5 is turned on by pressing the external push-button which sends current through R5 to the shutdown terminal of the regulator. When this voltage rises to the operation threshold for the shutdown pin, U5 comes out of sleep mode and provides regulated 3.75 volts to the microprocessor and RF receiver. When the microprocessor U2 is operating, it supplies current from pin 7 through isolation diode D71 which maintains regulator U5 in active mode. When the scoreboard is turned off by pressing a button on the remote control, the processor turns off the voltage from pin 7 thus putting regulator U5 back into sleep mode. R4 and C8 hold the regulator inactive when the processor is not operating. U4 is turned on by the microprocessor U2 outputting a “high” on pin 3. It is only turned on when needed (to change the displays) in order to conserve power. U4 provides regulated voltage of nominally 15 volts, set by R1 and R9, to operate the displays. C3 stabilizes the regulator U4 and U1. The 15 volts is also fed into voltage regulator U1 to provide 5 volts to the logic circuits and power drivers for the displays. C3 stabilizes the output of U1. R3 holds the regulator inactive when the processor is not operating. Microprocessor U2 is an 8 bit CMOS single chip microprocessor, which contains an integrated processor, program and data memory, an oscillator circuit, two timer/counters, and 24 bits of I/O. The supply current of the processor is very low to allow operation from batteries. The processor is used to decode the incoming serial bit stream from the RF receiver and to control the operation of the solenoids that display the score. Processor Oscillator Crystal X1 and C10 and C11 form control the frequency of the oscillator circuit built into the microprocessor. The frequency of the oscillator is 4.000 MHz. The oscillator in the microprocessor is programmed to operate in “Low EMI” mode to reduce emissions and reduce power consumption. RF Receiver The RF receiver U11 used here is an integrated RF receiver from RF Monolithics, Inc. This receiver uses the ASH design which has no local oscillator and an input SAW filter and thus has very low spurious emissions. Diode D73 reduces the voltage from 3.75 to approximately 3.2 volts to meet the supply voltage specification of RFM. C15 filters the supply voltage for voltage to U2. C16 sets the data rate filter rolloff, and C15 filters the internal reference voltage for U2. Miscellaneous I/O Jumpers JP1 and JP2 which are pulled up by R7 and R8 and fed to the microprocessor input pins 11 and 12, are used to set the unit address of the scoreboard in the case where there are more than one unit operating within radio range of each other. Their input LED1 is controlled by the microprocessor output pin 16 and current limited by R12, is used for general diagnostics. U3 is used to detect low battery condition. R10 and R11 set the trip point (nominally 13.5 volts) of the detector. When the battery voltage has dropped enough to cause the voltage from U4 to drop below 13.5 volts, it pulls the voltage to processor input pin 13 low through pull up resistor R2 to signal low battery. Solenoid Driver Circuits The displays all use electromagnets which move painted cards in various patterns to display the scores. The circuit for driving them uses a multiplexing scheme to be able to drive the 84 electromagnetic solenoids from only 14 microprocessor outputs. U6, U9, and U10 are current sourcing drivers that provide current to the selected rows of solenoids. U8 is an eight channel inverter that provides complimentary data to alternate rows of solenoids. U7 is a sinking driver that sinks one or more columns of solenoids. Diodes D1 to D70 provide isolation for rows of solenoids to prevent “sneak” paths of current through other solenoids. Z1 provides a place for the inductive “kick” current to flow when turning off the solenoids. In the operation of the scoreboard, the solenoids are powered only when it is necessary to change the displayed information.

CD&T FCC ID: ODF-RC01 A. DEVICE UNDER TEST The device is a low power receiver used to receive and decode commands from its companion transmitter (OB2-STDREM) and use those commands to control various functions. The product is a portable remote controlled baseball scoreboard. This product is designed to operate under the provisions of Part 15.109 of the FCC rules. The frequency of operation is 315 MHz. nominal. Power for the device was provided by an internal 24 volt battery back consisting of 16 AA cells in series. The receiver and decode logic circuits are regulated at 3.75 volts. The higher supply voltage is used to operate servo relays. There are no provisions for external connection to any other source of power. This receiver of this device is a TRF circuit using SAW filters to achieve the desired receive frequency. A SAW delay line is used to provide a time lag between two rf amplifiers so that the amplifiers may be alternately turned on and off (approx. 245kHz.) and thus realize a relative high gain without the risk of instability. The entire receiver circuit is contained in a single monolithic integrated circuit. The only external rf component is an internal dipole antenna. There are no adjustable components in this device. B. MEASUREMENT PROCEDURE: RADIATED EMISSIONS Field strength measurements were conducted according to the procedures set forth in ANSI C63.4 (1992). Testing was conducted with the device powered from The device under test was placed on a rotating turntable 0.8 meters high, centered at 3 meters distant from the measurement antenna. The device was placed in the center of the turntable and tested in the position shown in the test setup photograph. This housing is designed to mount upright on a pole or tripod so that it may be viewed in a readable position. The field strength measurements were taken using an HP8596E spectrum analyzer, an EMCO 3121C dipole set and an Avantek UJ210 preamp. The device was scanned from 30MHz. to 3.2GHz. and all emissions were noted. In this case, the only emissions detected were those that were harmonically related to the clock oscillator fundamental frequency. At each detected frequency of emission, the device was measured by rotating the turntable and adjusting the antenna height over a range of 1 to 4 meters to obtain the maximum output level. This procedure was performed with both horizontal and vertical antenna polarizations with the device in the positions described above. The peak reading for each frequency was recorded in the second column on the data sheet. No emissions were detected above 80 MHz.