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HAMTRONICS REP-200, Installation, Maintenance & Operation Manual, Page: 19 / 23

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HAMTRONICS REP-200 Installation, Maintenance & Operation Manual Download Page 19

©1999  Hamtronics, Inc.; Hilton NY; USA.  All rights reserved.  Hamtronics is a registered trademark.    Revised: 4/29/04 

- Page 19 -

R14 100K 
R15 10K 
R16 15K 
R17 10K 
R18 

2ea 470 ohms in series 

R19 150K 
R20 

20K or 22K Pot. 

R21-R22 10K 
R23 27K 
R24 22 

Meg. 

R25 47K 
R26 3.3K 
R27 27K 
R28 1 

Meg. 

R29 510K 
R30 10K 
R31 510K 
R32 680 

ohms 

R33 27K 
R34-R35 680 

ohms 

R36 470 

ohms 

R37-R39 680 

ohms 

R40 680K 
R41 100K 
R42 27K 
S1 

SPST toggle switch 

T1 

600:600 ohm transformer 

Caution: Most of the IC's are static 
sensitive.  Use suitable precautions. 

U1 MC-6803P 

microcontroller 

 

 (or HD-6303RP CMOS) 

U2 

G8870P DTMF Decoder 

U3 

74HC00 quad NAND gate 

U4 

74HC02 quad NOR gate 

U5 74HC373 

Multiplexer 

U6 

2732A or 27C32 EPROM 

U7 

LM-324 quad op amp 

U8 

4066B quad analog switch 

U9 

4N33 or 4N26 optocoupler 

U10 ULN2003A/MC-1413 

 

 

 peripheral driver array 

U11 

7805 voltage regulator 

Y1 

3.57595 MHz crystal 

Z1-Z4 Ferrite 

beads 

 
 
 
 

PARTS LOCATION & 
SCHEMATIC DIAGRAMS.

Summary of Contents for REP-200

Page 1: ... 17 Courtesy Beep Type 17 Time Out Timer 17 TEST FEATURES 17 REBOOTING COMPUTER 17 AUXILIARY CONTROL OF EXTERNAL CIRCUITS 17 REGISTRATION 18 COPYRIGHTS 18 OBTAINING A NEW EPROM 18 COR 5 BOARD PARTS LIST 18 PARTS LOCATION SCHEMATIC DIAGRAMS 19 PLEASE READ THIS NOW Before you unpack the repeater Take a minute to note how the unit is packed If you should ever need to return the unit for service at so...

Page 2: ...that many users objected to the weak carrier on the air when the repeater was not in use so we stopped making repeaters this way as the default keying option Shielding It is important with frequency synthesizers to avoid getting even small amounts of rf from output stages of a transmitter back into the vco or synthesizer chip Such unwanted feedback can prevent the synthesizer from properly locking...

Page 3: ...he monitor speaker J1 J2 dc power input J3 J4 auxiliary receiver COS and audio J5 J6 and phone line J7 J8 There also is a single terminal for the alarm input J9 The mating plugs for these terminals are supplied They are installed on the wires by crimping the lugs over the stripped end of the wire Other connections for auxiliary control wires CTCSS Defeat and Voice ID Trip E7 E8 and RAM backup powe...

Page 4: ...Auxiliary Receiver Push on terminals J5 and J6 provide COS and audio connections for an auxiliary receiver either as a second input receiver or to cross link two repeaters Touch tone commands control when the receiver is active in the repeater The aux receiver may also be used simply as a control link a secondary channel on which to send touch tone commands for control of the repeater in which cas...

Page 5: ...l for complete procedure THEORY OF OPERATION General Theory of operation of the trans mitter and receiver modules is covered in their own separate instruction manuals Following is a discussion of the COR 5 Controller Module organized by function Microcomputer controllers always look like there isn t much to them be cause most of the complexity is in the firmware inside the EPROM instead of in the ...

Page 6: ...nd pulse to the reset line on the 6803 thereby restarting it CR5 is feedback for the multivibrator to completely discharge C27 once U4 pin 4 goes low so the timer is reset to zero Audio Circuits The circuitry at the top of schematic sheet 2 involves cos and audio input signals from the main and auxiliary receiver processed to provide audio outputs to the exciter and touch tone decoder chip and a C...

Page 7: ...resistor R42 providing the current and C31 acting as an rf bypass Power Supply Circuits Refer to the bottom of schematic sheet 3 Operating power for the re peater enters the controller board at J3 J4 A fuse in this path provides protection mainly for the traces on the pc board and fire protection CR7 provides protection against reverse voltage transients In the event that the actual power supply i...

Page 8: ...er Cure for this type of intermod can be increasing isolation between the transmitter and receiver This could be accomplished by further separation of transmit and receive antennas installing a better duplexer or additional filtering in the receive line with a front end crystal filter or a cavity Intermod also can be caused by two strong signals from nearby transmitters mixing in the repeater rece...

Page 9: ...e transients It is always a risk but if a short circuit occurs hopefully the fuse will blow before any damage to the wiring or pc board occurs If it is necessary to change the fuse unsolder the old one from the top of the board and replace it with a new 7 amp type GJV pigtail fuse If you can t find one you can solder your own leads to the end of a regular type AGC plug in fuse MAINTENANCE CAUTION ...

Page 10: ...he mic gain pot in the exciter is used to set the autopatch gain and the repeat audio and tone level pots on the controller are used to set normal repeat audio levels Any change to the pots in the exciter require that the pots on the controller be reset afterwards FCC INFORMATION This device has also been granted a registration number by the Federal Communications Commission under part 68 rules an...

Page 11: ...NITOR VOLUME control sets the level of audio to the external monitor speaker if one is used To conserve space and allow a low profile chassis and panel design the REP 200 has provision to drive a local 8 ohm speaker but has no built in speaker We offer a low cost 3 x 5 oval speaker as an option if you don t already have one There are push on terminals on the controller board for connection of this...

Page 12: ...nalyzes the digits you sent Note that the computer will not ac cept any new commands until it finishes analyzing the previous one you sent and finishes the rest of a complete program cycle which involves many other aspects of repeater operation This normally takes 2 to 3 seconds If you try to send a command before then the computer will ignore it because the input buffer is still loaded with the p...

Page 13: ...s mode the owner must enter his password and then the code to turn on open access autopatch Making Phone Calls To make a phone call from a mobile or portable transceiver key the transmitter and send the digits on the tone pad required to activate the autopatch Be careful not to hold the last digit too long because any tones present when the phone line is connected will be counted by the phone exch...

Page 14: ...ates the toll call allow function with a touch tone command using his password or had the repeater programmed when made to default in the toll call allow mode then the computer in the repeater automatically disconnects the phone line if a user dials a 0 or 1 or any other restricted digit as the first digit of a phone call The autopatch can be programmed when we burn the eprom to restrict certain u...

Page 15: ...ose access immediately User TT Control Inhibit The user controls INHIBIT function allows the owner to prevent users from using commands they normally are allowed i e autopatch on off and Touch Tone Repeater Access open close which are the only commands allowed to general users The user controls ALLOW command restores normal control Both com mands require the owner enable command password to have b...

Page 16: ...st to let them reset the alarm in case it is tripped There is no harm done in leaving the courtesy beep in the alarm condition until you have a chance to discover that the alarm has been tripped and reset it yourself The alarm circuit has a memory of sorts Once the alarm has sounded it will not sound again until after it is re set However if the alarm is tripped more than once it will sound again ...

Page 17: ... them at the factory and thought they might be helpful The test cw command forces the cwid When you use this command remember that since the owner command password is disabled whenever the cwid runs you will need to re send the owner command enable password again before you can make further changes requiring the password The test carrier command locks the transmitter on the air for a period of 10 ...

Page 18: ...r the parameters to be burned into your EPROM you may find that you would like to make some changes at some time We would like to make it as easy as possible for you to order a new EPROM and although it is very time consuming for us to do we try to charge as little as possible knowing that we don t need to necessarily cover all of our cost on support for a product such as the REP 200 We also know ...

Page 19: ... R39 680 ohms R40 680K R41 100K R42 27K S1 SPST toggle switch T1 600 600 ohm transformer Caution Most of the IC s are static sensitive Use suitable precautions U1 MC 6803P microcontroller or HD 6303RP CMOS U2 G8870P DTMF Decoder U3 74HC00 quad NAND gate U4 74HC02 quad NOR gate U5 74HC373 Multiplexer U6 2732A or 27C32 EPROM U7 LM 324 quad op amp U8 4066B quad analog switch U9 4N33 or 4N26 optocoupl...

Page 20: ... 1999 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 4 29 04 Page 20 ...

Page 21: ... 1999 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 4 29 04 Page 21 ...

Page 22: ... 1999 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 4 29 04 Page 22 ...

Page 23: ... 1999 Hamtronics Inc Hilton NY USA All rights reserved Hamtronics is a registered trademark Revised 4 29 04 Page 23 ...

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