Filter
Top Products
March 1999
Part No. 001-2009-600
10-23
OCXO SCHEMATIC
FIGURE10-28
2
J902
WO 902
INPUT BNC
10 MHz FROM
WWV
1
R901
1k
C901
150pF
R902
10k
CR901
R903
270
C902
.01
+5V
OCXO 1
Y901
10 MHz
3
RF OUT
CASE GND
4
5
C925
.01
DC IN
REMOTE + 6
J901
S904
R905
430
+5V
18
R906 200
+15V
27
3
4
6
5
R907
2.4k
REMOTE - 5
65
4
1
2
CR902
CR903
R908
10k
U908
4N35
+5V
OCXO + 4
S905
R909
430
+5V
18
R910 200
+15V
27
3
4
6
5
R911
2.4k
OCXO - 3
65
4
1
2
CR904
CR905
R912
10k
U909
4N35
+5V
U902D
U902A
U902C
U904A
74HC04
U903D
12
13
1
2
10
9
112
13
11
3
82
11
U901A
74HC00
U902B
U904D
U901D
U901B
U901C
1
2
3
4
5
6
11
10
12
13
11
4
5
6
9
10
8
U906B
9
13
12
11
10
U906A
DS7830J
5
4
3
2
1
U905
74HC393
CLK QC
CLR
4
15
+5V
+5V
L904
.39uH
R975
51
C923
470pF
L905
1.2uH
C924
470pF
L906
.39uH
C916
.01
WO 904
10 MHz
REF OUTPUT
L901
3.9uH
R904
51
C903
.0039
L902
10uH
C904
.0039
L903
3.9uH
C917
.1
WO 903
1.25 MHz
REF OUTPUT TO
8-WAY SPLITTER
2
B1
A1
A2
R915 10k
11
CLR2
R916
4.7k
C906
150pF
R913
10k
R914
3.3k
C905
.001
7
6
13
4
12
REXT
2
CEXT2
Q1
Q1
Q2
3
15
14
10
5
CLR1
REXT1
CEXT
1
Q
2
U907
74HC123
B2
U904B
R920
1M
R921
30k
U904C
+
C909
22
+
C910
22
U904D
FAIL
STROBE
35 9
46 8
3
2
1
J904
P904
CLOSE
UPON ALARM
OPEN
UPON ALARM
R931
0
Q906
3658
+5V
R932
100
R933
150
DS902
ONLINE
GREEN
STANDBY
YELLOW
FAIL
RED
OCXO 1
Q907
3658
+5V
R934
0
U912A
74HC32
U903C
9
10
1
2
8
3
R935
27k
Q908
3658
+15V
K902
14 8
17
9 OCXO 1 ALARM +
10 OCXO 1 ALARM -
3
2
1
J903
P903
CLOSE
UPON
ALARM
OPEN
UPON
ALARM
R936
0
Q903
3658
+5V
R927
100
R928
150
DS901
OUTPUT
OK
GREEN
OUTPUT
ALARM
RED
OCXO RF OUTPUT
Q904
3658
+5V
R929
0
U902C
9
10
8
R930
27k
Q905
3658
+15V
K901
14
8
17
7 RF ALARM OUT +
8 RF ALARM OUT -
A1
A2
R924 10k
11
CLR2
R925
270k
C912
.047
R922
10k
R923
5.1k
C911
150pF
7
6
13
4
12
REXT2
CEXT2
Q1
Q1
Q2
3
15
14
2
10
CLR1
REXT1
CEXT1
B2
U907
74HC123
B1
3
2
1
J905
P905
CLOSE
UPON ALARM
OPEN
UPON ALARM
R936
0
Q909
3658
+5V
R937
100
R938
150
DS903
ONLINE
GREEN
STANDBY
YELLOW
FAIL
RED
OCXO 2
Q910
3658
+5V
R939
0
U912B
74HC32
U903A
74HC08
1
2
4
5
3
6
R940
27k
Q911
3658
+15V
K903
14
8
17
11 OCXO 2 ALARM +
12 OCXO 2 ALARM -
3
2
1
J907
P907
CLOSE
UPON ALARM
OPEN
UPON ALARM
R941
0
Q912
3658
+5V
R927
100
R928
150
DS901
OK
GREEN
ALARM
RED
DELAT F
Q913
3658
+5V
R944
0
U914B
4
5
6
R945
27k
Q914
3658
+15V
K904
14
8
17
13 DELTA F ALARM +
14 DELAT F ALARM -
OCXO 1 ALARM
RF OUTPUT ALARM
J901
DELTA F ALARM
+5V
+5V
+5V
14
SIGN
IN
U913
4046B
R973
470k
R974
39k
12
11
5
4
A2
A1
INH
+5V
PC2 OUTPCP OUT
113
3
4
COMP
IN
C1 B
+
C922
2.2
+
C921
2.2
6
7
C1 A
VCO
OUT
U910A
74HC74
2
5
PRE
CLR
Q
D
CLK
3
4
+5V
+5V
U910B
74HC74
8
9
PRE
CLR
Q
Q
CLK
11
10
+5V
+5V
12
D
13
1
FAIL STROBE
FAIL STROBE
FAIL STROBE
OCXO 2 ALARM
3
2
1
J906
P906
ENABLE
DISABLE
FAIL STROBE
+15V
K905
14 8
17
15 DC ALARM +
16 DC ALARM -
DC ALARM
+15V
K906
14 8
17
17 AC ALARM +
18 AC ALARM -
AC ALARM
CLOSE
UPON ALARM
3
2
1
P909J909
2-13
6
OPEN
UPON ALARM
3
2
1
J908
P908
ENABLE
DISABLE
CLOSE
UPON ALARM
3
2
1
P911J911
OPEN
UPON ALARM
C925
.01
OCXO 2
Y902
10 MHz
DC IN
CASE GND
RF OUT
5
4
3
R917
1k
C907
150pF
R918
10k
CR906
Q902
3658
R919
270
+5V
C908
.01
5
4
3
2
1
+15V
P912
S903
DC ON/OFF
S901
OCXO 1
TEST
S902
OCXO 2
TEST
NC
NO
NC
NO
FRONT PANEL SWITCH CONTROLS
+15V
CR908
C913
.01
C914
.01
+15V
C925
.01
C926
.01
CR906
F901
2A
1
2
J901
1
2
3
4
P913
AC/DC SENSE
FROM
POWER
SUPPLY
023-2000-930
+5V
+15V
Q915
3658
R948
30k
R951
0
Q916
3657
R949
30k
R946
15k
R950
15k
R952
0
R953
1k
U914A
74HC08
3
1
2
+5V
Q917
3658
+5V
R954
150
OK
GREEN
STANDBY
YELLOW
ALARM
RED
DC ALARM
DS905
3
2
1
J910
P910
ENABLE
DISABLE
R956
1.3k
R955
1.3k
FAIL STROBE
Q921
3657
R962
30k
R963
0
R964
1k
U914D
11
12
13
+5V
Q922
3658
+5V
R965
150
OK
GREEN
ALARM
RED
AC ALARM
DS906
R967
1.3k
R966
1.3k
FAIL STROBE
R968
30k
R969
15k
Q923
3657
+5V
R970
10k
R971
36k
Q924
3658
R972
30k
R977
15k
Q925
3658
R957
30k
R958
15k
Q918
3657
+5V
R959
10k
R960
36k
Q919
3658
R961
30k
R976
15k
Q920
3658
NOTES:
1. ALL RESISTORS ARE IN OHMS AND ALL CAPACITORS IN MICROFARADS
UNLESS OTHERWISE SPECIFIED.
2. IC PIN NUMBERS NOT SHOWN:
U901, U902, U903, U904
U905, U910, U912, U914
U907, U911, U913
IC
PIN NUMBER
+5V GND
14 7
16
8
C929
.01
C930
.01
C931
.01
C932
.01
+15V
C933
.01
C934
.01
C935
.01
C936
.01
C938
.01
C939
.01
C940
.01
C941
.01
C937
.01
C942
.01
C943
.01
C944
.01
C945
.01
C946
.01
C947
.01
C948
.01
VCO
OUT
+5V