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100.0
AD[0..7]
A0
8031ONLY
W1
0OHM
MICROPROCESSOR
Y1
12MHZ
EA/VP
31
X1
19
X2
18
RESET
9
INT0
12
INT1
13
T0
14
T1
15
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
P0.0
39
P0.1
38
P0.2
37
P0.3
36
P0.4
35
P0.5
34
P0.6
33
P0.7
32
P2.0
21
P2.1
22
P2.2
23
P2.3
24
P2.4
25
P2.5
26
P2.6
27
P2.7
28
RD
17
WR
16
PSEN
29
ALE/P
30
TXD
11
RXD
10
U2
8031
R2
10.0K
C3
33PF
C2
33PF
C1
10UF
+5V
D1
2
Q1
19
D2
3
Q2
18
D3
4
Q3
17
D4
5
Q4
16
D5
6
Q5
15
D6
7
Q6
14
D7
8
Q7
13
D8
9
Q8
12
C
11
OC
1
U8
74ALS573
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
A0
10
A1
9
A2
8
A3
7
A4
6
A5
5
A6
4
A7
3
A8
25
A9
24
A10
21
A11
23
A12
2
O0
11
O1
12
O2
13
O3
15
O4
16
O5
17
O6
18
O7
19
PGM
27
CE
20
OE
22
VPP
1
NC
26
U9
27C64
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
/VFILTER
/LBAND
/10KHZ
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
+5V
1
2
3
4
5
6
7
8
9
10
R5
10K
<2>
A4
<1>
B4
<3> <3>
B2 D1
<4>
E2
R10
100.0
R9
100.0
R8
100.0
R7
100.0
R6
100.0
LED_ON
LED_300K
LED_10K
LED_LBAND
LED_70M
D1
2
Q1
19
D2
3
Q2
18
D3
4
Q3
17
D4
5
Q4
16
D5
6
Q5
15
D6
7
Q6
14
D7
8
Q7
13
D8
9
Q8
12
CLK
11
OC
1
U6
74ALS574
AD0
AD1
AD2
AD3
AD4
AD5
AD6
NC
+5V
+5V
NC
NC
B4
C1
<3>
<4>
<3>
B2
R300
10.0K
2DB
RO---BLANK
/1MHZ
+5V
HALF
SPAN
1
2
J300
P300
FILTER
INPUT
SPAN_UP
SPAN_DN
BANDWIDTH
NC
FILTER
INPUT
SPAN_UP
SPAN_DN
LED_LBAND
LED_FULL
LED_10M
LED_1M
LED_100K
BANDWIDTH
1A
1
1B
2
2A
3
2B
4
3A
5
3B
6
4A
7
4B
8
5A
9
5B
10
6A
11
6B
12
7A
13
7B
14
8A
15
8B
16
9A
17
9B
18
10A
19
10B
20
11A
21
11B
22
12A
23
12B
24
13A
25
13B
26
14A
27
14B
28
15A
29
15B
30
16A
31
16B
32
17A
33
17B
34
J1
CONNECTS
TOJ303
FRONT
BOARD
<6>
A2
PANEL
J1
H1
NC
<4>
<3>
<3>
<3>
R133
68.1K
FOCUS
INTENS
CFT
SWP_SPEED
ROTATE
SCALE
CFT
LED_ON
LED_300K
LED_10K
LED_70M
INTENS
S_SPD
FOCUS
D5
B3
A1
A3
R3
15.0K
CFT
<4>
E3
<3>
C5
VREF
5
+IN
2
DO
6
---IN
3
VCC
8
CLK
7
CS
1
GND
4
U1
ADC0831
R1
7.32K
R4
2K
/RO---EN
+5V
+5V
<3>
C2
<3>
C3
4
5
6
U7B
74ALS00
9
10
8
U7C
74ALS00
FULL
/10MHZ
/FULL
12
13
11
U7D
74ALS00
1
2
3
U7A
74ALS00
LED---CONT
AD7
R14
100.0
R13
R12
100.0
R11
100.0
LED_1M
LED_10M
LED_100K
LED_FULL
HORZPOSN
READOUT
<4>
E3
2
3
1
8
4
U12A
TL072
R27
20K
R26
20.0K
XAXIS
+11.8V
+11.8V
---5V
VREFA
4
VREFB
18
WR
16
CS
15
A/B
6
D7
7
D6
8
D5
9
D4
10
D3
11
D2
12
D1
13
D0
14
RFBA
3
OUTA
2
AGND
1
OUTB
20
RFBB
19
DGND
5
VDD
17
U10
7528
AD0
AD1
AD2
AD3
---5V
R25
24.3K
VCC
8
RCL
6
STO
7
GND
5
DI
3
DO
4
CLK
2
CE
1
U4
2444
C16
.1UF
NC
CAL
READOUT
H2
H4
CR1
R15
4.02K
R17
4.32K
2
3
7
6
8
5
1
4
U11
LM311
+15V
+5V
C12
.1UF
IN
3
OUT
1
G
2
U3
78L05
C5
100UF
NC
NC
<4>
<4>
VERT_POSN
HORZ_POSN
V_POSN
H_POSN
+11.8V
---11.8V
+5V
R16
150.0K
R18
150.0K
R20
4.75K
Q100
SCALE
+5V
C13
10UF
BCE
Q3
R245
1.00K
+11.8V
J100
LIGHTENABLE
1---2 ENABLE
R28
20.0K
AD4
AD5
AD6
AD7
/WR
/RO---POS
A0
+5V
<4>
E3
5
6
7
U12B
TL072
R29
20K
YAXIS
+11.8V
---11.8V
VERTPOSN
READOUT
---5V
--5V SUPPLY
C8
.1UF
IN
2
OUT
3
G
1
U5
79L05
---11.8V
---5V
FRONT
PANEL
DS300
DS200
DS100
R21
100.0
---11.8V
---15V
1
2
3
4
J414
R246
1.00K
Q3
2---3 DISABLE
1
2
P200
1
2
P800
123
P100
CONNECTS
TOCRT
<8>
H1
J2
1
2
J2
ROTATION
TRACE
1/2W
Q1
R23
100.0
R24
100.0
R19
180
Q2
C17
.1UF
+15V
---15V
1705A SPECTRUM MONITOR
A3A1 GRATICULE LIGHT BOARD
REV JUL 1994
NOTE:
MICROPROCESSOR <5>
ANDSERIALNUMBERRANGES.
SEEPARTSLISTFOREARLIERVALUES
PART OF A3 MAIN BOARD