Burghardt Amateur Center BU-1000 BU-1000 Data Transceiver Board User Manual 87376

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Document ID	87376
Application ID	s0Sc872MWFhUG4WePN/Khw==
Document Description	iNSTALLATION INSTRUCTIONS
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Microsoft Word - pdf
Filesize	3.68kB (45998 bits)
Date Submitted	2000-02-21 00:00:00
Date Available	2000-04-12 00:00:00
Creation Date	2001-04-09 16:36:54
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-04-09 16:36:59
Document Title	Microsoft Word - 87376
Document Creator	ADOBEPS4.DRV Version 4.24
Document Author:	jsoscia

BU-1000 INSTALLATION
The BU-1000 has a 5 pin connector for hookup to the MRU(meter reading unit)
modem and a BNC connector for connection to a half wave dipole. The Pin-out of
the 5 pin connector is as follows.
1)PTT(push to talk)
2)12V(regulated 12 volt input)
3)mod in(modulation input)
4)RXA(receiver audio output)
5)GND(ground)
THEORY OF OPERATION
The BU-1000 is a low power data transceiver.
RECEIVER SECTION
The receiver is a double conversion superhetrodyne design. When in the receive
mode, signal is allowed to pass to Q1 RF AMP where it is amplified and sent to
U1 for the first mix. X2 is a 3rd overtone crystal which is tripled by Q2 to produce
the first mix frequency. The first mixer is located in U1 and produces a 10.7MHZ
first IF. X1 produces the 2nd mix frequency of 10.245MHZ. It is mixed in U1 to
produce a 455KHZ 2nd IF frequency. Receiver audio is then detected in U1 to
produce RXA out.
TRANSMIT SECTION
Modulation is applied to D3 varactor and is used to shift the frequency of X201 to
produce FM modulation. X201 is a 3rd overtone crystal. Its frequency is tripled by
Q241 to give the apropriate output frequency. It is then amplified by Q242
predriver and Q243 final. It is passed through D440/441 switching when in
transmit mode and from there applied to the antenna.
BU-1000 SPECIFICATIONS
GENERAL
FREQUENCY COVERAGE:1 CHANNEL
(173.20375/173.21/173.2375/173.2625/173.2875/173.3125/173.3375/173.3625/
173.39/ OR 173.39625 MHZ)
TX CURRENT DRAW: 250MA
RX CURRENT DRAW: 120MA
RECEIVER
SENSITIVITY: 10DB SINAD AT .8UV
AUDIO OUTPUT LEVEL: 2VPP AT 3KHZ DEVIATION
1ST IF FREQUENCY: 10.7 MHZ
2ND IF FREQUENCY: 455 KHZ
TRANSMITTER
POWER: 250MW
BU-1000 DATA TRANSCEIVER BOARD PARTS LIST
VERSION 2
RECEIVER SECTION
C2,8,10,11,13,16,17,18,19,20,23,24
C6
C7
C14
C4
C15
C5
C12
C3
C25
C21
R6,2
R10,12
R3,7,8
R4
R5
R1
R9
R11,13
R14
FL1
FL2
L1
L2
L3
L4
U1
U2
X1
X2
Q1
Q2
ZD1
.1UF NEWARK 07WX6808
33PF DIGIKEY PCC330CCT-ND
18PF DIGIKEY PCC180CCT-ND
120PF DIGIKEY PCC121CCT-ND
4.7PF DIGIKEY PCC4R7CCT-ND
47PF DIGIKEY PCC470CCT-ND
22PF DIGIKEY PCC220CCT-ND
1UF TANTILUM NEWARK 93F2694
100PF DIGIKEY PCC101CCT-ND
1000PF DIGIKEY PCC102BCT-ND
2200PF DIGIKEY PCC222BCT-ND
470 NEWARK 07WX0214
39K NEWARK 08WX8266
1K NEWARK 07WX0211
5.6K NEWARK 08WX8274
15K NEWARK 08WX7826
100K NEWARK 96F6995R100.0K
10K NEWARK 08WX8237
22K NEWARK 08WX8252
330 OHM 1/2 WATT DIGIKEY 330H-ND
E10.7V NEWARK 87F2439
455KHZ NEWARK 90F2264
43NH DIGIKEY DN4010-ND
1.5UH DIGIKEY TK1412-ND
.108UH DIGIKEY TK2713-ND
.64MH DIGIKEY TK1302-ND
MC13135DW NEWARK 07F2896
78L05ACP NEWARK 07F7397
10.245 MHZ BOMAR
SELECTED BOMAR
MRF901 NEWARK 08F1298
2N3904 NEWARK 09F5663
6.8 V 1/2 WATT ZENER NEWARK 09F4090
TRANSMITTER SECTION
C265,252,259,260,261,263,272
C253,254
C255
C262,250
C267
C271,273
C268
.1UF NEWARK 07WX6808
47PF DIGIKEY PCC470CCT-ND
18PF DIGIKEY PCC180CCT-ND
220PF DIGIKEY PCC221BCT-ND
2.2PF DIGIKEY PCC2R2CCT-ND
1000PF DIGIKEY PCC102BCT-ND
.01UF DIGIKEY PCC103BCT-ND
R210
R212
R221,216,211,217
R214
R215,220
R219,223
R222,218
R224
R225
470 OHM NEWARK 07WX0214
15K NEWARK 08WX7826
1K NEWARK 07WX0211
5.6K NEWARK 08WX8274
18K DIGIKEY P18KECT-ND
100K NEWARK 96F6995R100.0K
10 OHM DIGIKEY P10ECT-ND
4.7K DIGIKEY P4.7KECT-ND
330 OHM 1/2 WATT DIGIKEY 330H-ND
R226
L290
L291
L292,296,297,299
L294,300
L295
L293
L298
Q242,241
Q243
X201
ZD2
D3
150 OHM DIGIKEY P150ECT-ND
1.5UH DIGIKEY TK1412-ND
.137UH DIGIKEY TK2714-ND
43 NH DIGIKEY DN4010-ND
1UH DIGIKEY PCD1131CT-ND
.241UH DIGIKEY TK2707-ND
.375UH DIGIKEY TK2729-ND
.211UH DIGIKEY TK2706-ND
MRF901 NEWARK 08F1298
2N4427 NEWARK 10WX2083
SELECTED
6.8V ZENER NEWARK 09F4090
MV2105 VARACTOR NEWARK 08F2197
COMMON SECTION
R401,402,403,400
C460,461
L475
D440,441
Q450
LED1
LED2
CN1
CN2
2 PIN JACK(OPTIONAL)
5 PIN PLUG(ACCESSORY)
2 PIN PLUG(OPTIONAL)
PINS(ACCESSORY)
1K NEWARK 07WX0211
.1UF NEWARK 07WX6808
56UH DIGIKEY PCD1106CT-ND
MPN3404 NEWARK 07F9506
2N3906 DIGIKEY 2N3906DICT-ND
GREEN LED DIGIKEY 67-1059-ND
RED LED DIGIKEY 67-1065-ND
5 PIN JACK DIGIKEY H2097-ND
BNC JACK DIGIKEY ARF1178-ND
DIGIKEY H2094-ND
DIGIKEY H2086-ND
DIGIKEY H2083-ND
DIGIKEY H2138-ND
VERSION 2(173 MHZ)
C1
C258,221
C9,222
C224
C257,251
C256
C269
C264
56PF DIGIKEY PCC560CT-ND
3.9PF DIGIKEY PCC3R9CCT-ND
2.2PF DIGIKEY PCC2R2CCT-ND
3.3PF DIGIKEY PCC3R3CCT-ND
33PF DIGIKEY PCC330CCT-ND
8.2PF DIGIKEY PCC8R2CCT-ND
6.8PF DIGIKEY PCC6R8CCT-ND
18PF DIGIKEY PCC180CCT-ND

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File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.3
Linearized                      : Yes
Create Date                     : 2001:04:09 16:36:54
Producer                        : Acrobat Distiller 4.0 for Windows
Author                          : jsoscia
Creator                         : ADOBEPS4.DRV Version 4.24
Title                           : Microsoft Word - 87376
Modify Date                     : 2001:04:09 16:36:59-04:00
Page Count                      : 4

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