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Spectra Engineering MX800 - Circuit Diagram: MX800 RX VCO CIRCUIT DIAGRAM; RX VCO Circuit Diagram Details

Spectra Engineering MX800
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1 2 3 4 5 6 7 8
A
B
C
D
8
7654321
D
C
B
A
9 TRADE ROAD
MALAGA 6062
WESTERN AUSTRALIA
PHONE +618-92482755
R3
10K
R1
10K
R2
10K
ETH ETH
RV1
1K
RV2
1K
+5+5
+5
JMP3
ETH
JMP2
JMP4JMP5
JMP1
JMP6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
SK5
26PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
SKF
26 PIN IDC
1
6
2
7
3
8
4
9
5
SK8
DB9/F
1
20
2
21
3
22
4
23
5
24
6
25
7
26
8
27
9
28
10
29
11
30
12
31
13
32
14
33
15
34
16
35
17
36
18
37
19
SK7
DB37/F
1
6
2
7
3
8
4
9
5
CN6
DB9/F
1
2
3
4
5
6
7
8
9
10
SK6.
16PIN
1
2
3
4
5
6
7
8
9
10
SK2.
16PIN
1
2
3
4
5
6
7
8
9
10
SK3
16PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SK1
16PIN
1
6
2
7
3
8
4
9
5
CN5
DB9/M
1
2
3
4
5
6
7
8
9
10
SKI
10 PIN IDC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SKH.
16 PIN IDC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
SKH
16 PIN IDC
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
CN1
DB15/F
1
2
3
4
5
6
7
8
9
10
SKE
10 PIN IDC
1
6
2
7
3
8
4
9
5
CN2
DB9/F
1
2
3
4
5
6
7
8
9
10
SKE.
10 PIN IDC
1
2
3
4
5
6
7
8
9
10
SK4
16PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
SK6
26 PIN IDC
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
CN3
DB25/F
DIG OUT BIT 0
DIG OUT BIT 1
DIG OUT BIT 2
DIG OUT BIT 3
DIG OUT BIT 4
DIG OUT BIT 5
DIG OUT BIT 6
DIG OUT BIT 7
BCD TENS BIT 3
BCD TENS BIT 2
BCD TENS BIT 1
BCD TENS BIT 0
BCD UNITS BIT 3
BCD UNITS BIT 1
BCD UNITS BIT 2
BCD UNITS BIT 0
DIG IN BIT 7
DIG IN BIT 6
DIG IN BIT 5
DIG IN BIT 4
DIG IN BIT 3
DIG IN BIT 2
DIG IN BIT 1
DIG IN BIT 0
DIGITAL ETH / +5V
DIG I/O
VF I/O
INTERFACE
ALARMS
RS-232
MONITOR
* MODE IS SWAPABLE
INTERFACE
FOR OPTION
INTERFACE PCB
ADDED CONNECTIONS
+12V O/P
HEADERS LOCATED
ON CONTROLLER PCB
RIBBON CABLE
RIBBON CABLE
CONNECTOR LOCATED
ON CHASSIS
REPEATER ENABLE
RX AUDIO 600 OHMS
RX TALK
RX MUTE
ALARM O/P #1
DC FM / WB INPUT
ALARM O/P #3/ MLEAD
PTT
RX DISCRIMINATOR
TX TALK
RX AUDIO 5 OHM
EARTH
TX VF LOOP BACK CTRL
TX AUDIO 600 OHM
ALARM O/P #2ALARM O/P #2
TX AUDIO 600 OHM
TX VF LOOP BACK CTRL
EARTH
RX AUDIO 5 OHM
TX TALK
RX DISCRIMINATOR
PTT
ALARM O/P #3/ MLEAD
DC FM / WB INPUT
ALARM O/P #1
RX MUTE
RX TALK
RX AUDIO 600 OHMS
REPEATER ENABLE
LOCATED ON CHASSIS
REAR CONNECTOR
RIBBON CABLE
RIBBON CABLE
ON CONTROLLER PCB
HEADERS LOCATED
+5V O/P
CCT DIAGRAM
MX800 TRUNK
1 OF 1 ACS021-1A
FOR DB37F
DATE REVISION TITLE
DRAWING No SHEET REV
REF
PCB
BY DATE
DESIGNED
DRAWN
CHECKED
APPROVED
APP
SPECTRA
ENGINEERING
(C) Copyright
+12V O/P
TEST TX VF I/P
TX FWD POWER
FINAL TX VF O/P
MON PTT
MUTE RX VF
RSSI O/P
TX REFL PWR
EARTH
+12V O/P
STANDARD CONNECTIONS
RIBBON CABLE
+5V O/P
+12V O/P
TEST TX VF I/P
TX FWD POWER
FINAL TX VF O/P
MON PTT
MUTE RX VF
RSSI O/P
TX REFL PWR
EARTH
GND
TXD *
RXD *
DIG I/O
DIGITAL ETH / +5V
DIG IN BIT 0
DIG IN BIT 1
DIG IN BIT 2
DIG IN BIT 3
DIG IN BIT 4
DIG IN BIT 5
DIG IN BIT 6
DIG IN BIT 7
BCD UNITS BIT 0
BCD UNITS BIT 2
BCD UNITS BIT 1
BCD UNITS BIT 3
BCD TENS BIT 0
BCD TENS BIT 1
BCD TENS BIT 2
BCD TENS BIT 3
DIG OUT BIT 7
DIG OUT BIT 6
DIG OUT BIT 5
DIG OUT BIT 4
DIG OUT BIT 3
DIG OUT BIT 2
DIG OUT BIT 1
DIG OUT BIT 0
FRONT
PANEL
BCD UNITS BIT 0
BCD UNITS BIT 2
BCD UNITS BIT 1
BCD UNITS BIT 3
BCD TENS BIT 0
BCD TENS BIT 1
BCD TENS BIT 2
BCD TENS BIT 3
MAIN GND
FINAL TX VF MONITOR
TX S-METER
BUSY CARRIER DETECT
TX REFELECTED POWER
TX TALK
TX VF LOOP BACK
SQUELCH DISABLE
TX DC-FM INPUT
TX PWR & VSWR ALARM
RX AUDIO 600 OHMS
TX AUDIO 600 OHMS
PTT
MODULATION GND
RX S-METER
TEST TX VF INJECT
RX DISCRIMINATOR
+5 VOLTS
+5 VOLTS
REPEATER ENABLE
MUTED RX VF
TX FWD PWR CAL ADJ RSSI CAL ADJ
+12V OP
ALARM O/P #1
TX AUDIO 600 OHMS
MAIN GND
RX AUDIO 5 OHM
MAIN GND
ALARM O/P #3/ MLEAD
MON PTT
GND RETURN
EARTH
TX REFL PWR
RSSI (CAL)O/P
MUTE RX VF
MON PTT
FINAL TX VF O/P
TX FWD (CAL)POWER
TEST TX VF I/P
+12V O/P
+5V O/P
RXD *
TXD *
GND

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