HAMTRONICS DVR-3 Assembly, Installation And Operation Instructions Download

Page: 10 / 11

- Page 10 -

MTG

C13

E1 AUDIO

E3 KEY

E2 TRIP

+5VDC BUS ON

ADDRESSING PADS

(NOT FOR PARTS)

PLAYBACK

RECORD

- C11+

CR2

C10

R10

C12

R11

COMPONENT LOCATION DIAGRAM

DVR-3 DIGITAL VOICE RECORDER MODULE

BREAK TRACE TO

DISCONNECT GND

TO MIC REF PAD

R12

MTG

COR-5 BOARD

JUMPER FROM

HOLES SHOWN LIKE
THIS ARE NOT USED

E4 B+

GREEN LEAD FROM RCVR AUDIO FT CAP

VIOLET JUMPER

GRAY LEAD, AUDIO OUTPUT

R13

BROWN LEAD, PLAYBACK CONTROL

R14

YEL LEAD, RECORD CONTROL

(RECORD CONTROL)

BLUE LEAD, KEY CARRIER

Summary of Contents for DVR-3

Page 1: ...essed all as one unit However with the addition of some external addressing switches the 20 second capacity can be broken up any way you like into multiple messages Although switching cir cuitry to do...

Page 2: ...parts are correct before sol dering Traces are close together so use a fine tip on the soldering iron All parts should be installed flush with the board Assembly Procedure Install and solder the part...

Page 3: ...the wrong point if the resistor was inad vertently reversed when the COR 5 board was assembled Wrap the wire around the resistor lead and tack solder b Connect the brown playback control wire to the...

Page 4: ...tal recording time is 20 seconds When you send the Record Voice Msg command the yellow TimeOut led will illuminate to indicate the DVR 3 is ready to record This led is used for convenience it does not...

Page 5: ...ssed Because we are addressing in one second incre ments the highest practical ad dress is 19 seconds We mentioned earlier that there are other operational modes besides the addressing mode These are...

Page 6: ...ace and internal precision reference clock This system uses eeprom technology to directly record analog signals so no d a and a d converters are required The 1020A ic uses a sampling rate of 6 4 kHz f...

Page 7: ...le line is what actually starts each record or play back cycle It is held low to make the chip run The EOM line puts out a low sig nal under two conditions First when the playback mode reaches the end...

Page 8: ...he regulated 5Vdc power bus on the COR 5 board Electrolytic capacitor C13 provides a low ac im pedance for the 5V bus on the DVR 3 board There are two separate 5Vdc busses on the DVR 3 board and separ...

Page 9: ...output on the audio output pins 14 15 during record Q1 does not latch on as it does in playback mode Switching transistors Q4 and Q5 act as a buffer for the Record Con trol input from the Time Out le...

Page 10: ...1 C3 Z1 CR2 S1 S2 C5 R2 R1 Q1 R3 C1 C6 R7 C9 C8 C4 C2 R4 R5 R9 C10 R10 C12 _ R11 Q2 COMPONENT LOCATION DIAGRAM DVR 3 DIGITAL VOICE RECORDER MODULE E6 E5 BREAK TRACE TO DISCONNECT GND TO MIC REF PAD R1...

Page 11: ...AF INPUT REF 17 18 AF OUT AF OUT 14 15 X DIGITAL RECORDER N C Q1 E3 KEY Q2 SWITCH _ AGC 19 R11 R12 Z1 C3 C4 C5 R7 C6 C8 C9 E5 E6 C11 R8 R9 R10 C10 C12 C2 R4 47K R5 47K CR2 C1 R1 R2 RECORD DVR 3 DIGITA...

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HAMTRONICS DVR-3, Assembly, Installation And Operation Instructions

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