LDG RVS-8 Assembly Manual Download Page 1

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LDG Electronics

1445 Parran Road St. Leonard MD 20685

Phone: 410-586-2177 Fax: 410-586-8475

e-mail: [email protected] Web site: www://radix.net/~ldg

RVS-8 Repeater Voting System

Assembly Manual

Ver 2.1

Summary of Contents for RVS-8

Page 1: ...LDG Electronics 1445 Parran Road St Leonard MD 20685 Phone 410 586 2177 Fax 410 586 8475 e mail ldg radix net Web site www radix net ldg RVS 8 Repeater Voting System Assembly Manual Ver 2 1...

Page 2: ...e it became apparent that component spacing was too tight and the PC board was expanded for ease of construction and use A larger LCD module is now provided We were able to find a source of larger bac...

Page 3: ...lled RP1 5 For markings 103 means 10K and 104 means 100K Then the crystal Use a left over piece of resistor lead to tie it down with holes provided on either side of the crystal This will keep it from...

Page 4: ...d Don t wear a wool sweater brush your feet across the carpet pet a cat then try to install the chips Reapply power The voltage check should stay the same and the current draw should be around 80 to 9...

Page 5: ...ition one site two is in position two ect On power up site one will be chosen for the default The display is updated when a new site is chosen as the current voted A site can not be selected as the cu...

Page 6: ...ber of hits on any channel is 100 Sites that are not selected at the end of a COR cycle are decremented by one For example if the current hits are site one 57 site two 28 site three 12 and site two is...

Page 7: ...ber can be viewed with the Channel S N menu Each step of the hysteresis level is equal to 6 counts of the internal number A hysteresis value of 5 means that a new signal must be 30 counts 5 times 6 hi...

Page 8: ...ing device will provide a low going voltage 0 0 to 4 5 volts when the channel is to be disabled and a high going voltage 6 5 to 20 volts when the channel is to be enabled The DIS Active State menu sho...

Page 9: ...r channels will float to zero volts The software provides a special counting function that keeps track of the voted sites during a COR cycle Just before the COR cycle ends about 1 mSec the output sele...

Page 10: ...for each site The calibration procedure described here will give you good performance while maintaining a minimum amount of time and test equipment required First transmit a 1000 Hz tone at 2 5 KHz d...

Page 11: ...k If there is no clock this may also indicates that the code is not executing Look around the sockets and connections between U1 and U2 for problems If there is still no LCD data look at the data line...

Page 12: ...kaging to return the unit to you Include a description of what problem you are having and a phone number you can be reached at in the evenings in case we have questions Repairs average about 3 to 6 we...

Page 13: ...ftware The RS 232 interface is not used with this version of the software The MAX 232 chip socket or the 4 1 0 uF electrolytic caps are not provided We had originally planned to add software for RS 23...

Page 14: ...ssor 0 V 0 V 0 V 0 V Test Point Aud 1 Test Point A D 1 Pin 2 of U11 Figure 1 Sample Waveforms for Alignment Audio In TP Aud 1 Pin 2 TP A D 1 1 KHz 2 V p p 1 V p p 0 1 V 3 KHz 2 V p p 1 V p p 2 0 V 5 K...

Page 15: ...J8 LCD Interface J5 Audio In J4 COR IN J3 Disable In J6 Output Select J2 Audio COR Out J1 Power J6 Output Select Gnd 7 5 3 1 12 8 6 4 2 10mA 1 2 3 4 5 6 Gnd J7 User Interface Power LED COR LED Data S...

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Page 19: ...n Screw Conn 3 Pin Screw Conn Heat Sink Shunt Ribbon Conn PC Board Bolt Nut Spacer RVS 8 Parts List Quantity 1 1 1 1 2 3 1 2 24 18 9 8 2 3 2 8 12 9 4 3 1 3 1 18 1 1 1 1 1 1 2 1 1 3 4 4 1 2 1 1 2 10 1...

Page 20: ...or on the STRB line of the X68C75 chip U2 A 2 2K resistor is provided with the kit to be used here any value between 1 K and 100K would work The resistor goes between pin 37 of U2 to the grounded pin...

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