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INPUT BNC
J902
WO 902
10 MHz FROM
+5V
WWV
C901
150pF
R903
C902
.01
270
R901
1k
2
R902
1
CR901
10k
3
RF OUT
OCXO 1
5
Y901
DC IN
10 MHz
C925
.01
CASE GND
4
J901
REMOTE + 6
+5V
CR902
R905
S904
430
1
8
+5V
6
5
R906 200
2
7
1
+15V
3
6
2
U908
4
5
4
4N35
CR903
R908
R907
10k
2.4k
REMOTE - 5
OCXO + 4
+5V
CR904
R909
S905
430
1
8
+5V
6
5
R910 200
2
7
1
+15V
3
6
2
U909
4
5
4
4N35
CR905
R912
R911
10k
2.4k
OCXO - 3
+5V
C907
150pF
C908
R919
270
.01
OCXO 2
R917
Y902
1k
5
3
Q902
DC IN
RF OUT
3658
10 MHz
C925
R918
CASE GND
.01
4
10k
CR906
FRONT PANEL SWITCH CONTROLS
P912
NO
+15V
5
S902
OCXO 2
NC
4
TEST
NC
3
S901
OCXO 1
NO
2
TEST
+15V
S903
1
DC ON/OFF
CR908
C913
C914
+15V
F901
.01
.01
2A
J901
1
C925
C926
CR906
2
.01
.01
P913
1
AC/DC SENSE
R948
FROM
2
+15V
30k
POWER
Q915
SUPPLY
3
+5V
3658
023-2000-930
R946
4
15k
R951
0
+15V
C929
C930
C931
C932
.01
.01
.01
.01
+5V
U914D
12
11
13
FAIL STROBE
R962
30k
Q921
3657
+5V
R963
0
AC ALARM
OK
Q922
ALARM
GREEN
3658
R965
RED
R964
150
1k
DS906
NOTES:
1. ALL RESISTORS ARE IN OHMS AND ALL CAPACITORS IN MICROFARADS
UNLESS OTHERWISE SPECIFIED.
+5V
2. IC PIN NUMBERS NOT SHOWN:
C933
C934
C935
C936
C937
PIN NUMBER
IC
+5V
GND
.01
.01
.01
.01
.01
U901, U902, U903, U904
14
7
U905, U910, U912, U914
C938
C939
C940
C941
C942
U907, U911, U913
16
8
.01
.01
.01
.01
.01
C943
C944
C945
C946
C947
C948
.01
.01
.01
.01
.01
.01
10-23
+5V
U906A
1
DS7830J
2
5
3
U901B
4
4
6
5
U901C
+5V
9
8
10
10
U901D
U906B
U902B
12
U904D
11
11
4
9
6
11
10
13
U905
12
U901A
5
1
5
13
CLK
QC
74HC00
74HC393
1
3
CLR
2
4
2
R913
B1
10k
3
+5V
CLR1
Q1
R914
Q1
3.3k
15
REXT1
CLR2
U907
C905
74HC123
.001
CEXT
REXT
14
1
10
B2
CEXT2
Q
5
Q2
2
A1 A2
U904A
U902D
U902C
12
74HC04
U903D
11
9
13
8
1
2
12
10
11
13
U902A
1
3
2
R922
10k
3
+5V
CLR1
Q1
R923
Q1
5.1k
15
REXT1
CLR2
C911
U907
74HC123
150pF
+5V
14
CEXT1
REXT2
1
PRE
2
2
U910A
D
B1
CEXT2
74HC74
3
5
10
CLK
Q
B2
Q2
A1 A2
CLR
4
+5V
COMP
SIGN
3
IN
+5V
U914A
U913
74HC08
4046B
1
VCO
3
4
2
FAIL STROBE
OUT
R949
6
30k
C1 A
+ C922
Q916
2.2
3657
R950
+5V
R955
C921
DC ALARM
15k
1.3k
2.2
R952
+
VCO
STANDBY
7
C1 B
0
OUT
YELLOW
Q917
R954
R956
PCP OUT
PC2 OUT
OK
3658
ALARM
1
150
GREEN
1.3k
R953
RED
1k
DS905
ENABLE
J910
P910
1
2
3
DISABLE
+5V
R957
Q918
30k
3657
R966
R959
1.3k
10k
Q919
R958
3658
15k
R967
R960
1.3k
36k
R961
30k
+5V
R968
Q923
30k
3657
R970
10k
Q924
R969
3658
15k
R971
36k
R972
30k
Q925
3658
R977
15k
October 1999
Part No. 001-2009-201
L904
L905
L906
C916
.01
.39uH
1.2uH
.39uH
WO 904
10 MHz
CLOSE
REF OUTPUT
UPON
R975
C924
C923
ALARM
470pF
51
P903
J903
470pF
1
R930
27k
2
L901
L902
L903
C917
1.25 MHz
.1
3.9uH
10uH
3.9uH
WO 903
3
REF OUTPUT TO
OPEN
8-WAY SPLITTER
UPON
R904
C903
C904
+5V
ALARM
.0039
.0039
51
R936
0
Q903
R927
3658
100
13
U902C
4
9
10
R915 10k
11
FAIL STROBE
+5V
R916
4.7k
7
2
C906
150pF
6
12
CLOSE
UPON ALARM
P904
J904
1
R935
27k
2
U904B
U904C
U904D
3
4
5
6
9
8
3
+
OPEN
C909
FAIL
R920
R921
STROBE
UPON ALARM
+5V
22
1M
30k
+ C910
R931
22
0
Q906
3658
R932
ONLINE
100
GREEN
U903C
9
U912A
8
10
74HC32
FAIL STROBE
1
3
2
13
4
R924 10k
CLOSE
11
+5V
UPON ALARM
P905
J905
R925
1
R940
270k
27k
7
2
C912
3
.047
OPEN
UPON ALARM
6
+5V
12
R936
0
Q909
3658
R937
ONLINE
100
GREEN
U903A
74HC08
1
3
U912B
2
74HC32
FAIL STROBE
4
6
5
ENABLE
P906
1
2
3
DISABLE
CLOSE
14
UPON ALARM
IN
P907
J907
R973
1
R945
470k
27k
12
A2
2
R974
3
OPEN
39k
11
UPON ALARM
A1
+5V
5
INH
R941
0
Q912
4
R927
3658
100
+5V
13
13
PRE
12 D
8
Q
U910B
U914B
74HC74
11
9
4
CLK
Q
5
CLR
FAIL STROBE
ENABLE
10
P908
+5V
CLOSE
DISABLE
UPON ALARM
J909
P909
1
2
3
OPEN
UPON ALARM
Q920
3658
R976
15k
CLOSE
UPON ALARM
J911
P911
1
2
3
OPEN
UPON ALARM
J901
RF OUTPUT ALARM
7 RF ALARM OUT +
1
7
8 RF ALARM OUT -
14
8
+15V
K901
Q905
3658
OCXO RF OUTPUT
OUTPUT
OUTPUT
OK
ALARM
GREEN
RED
DS901
R928
150
R929
0
Q904
8
3658
+5V
OCXO 1 ALARM
9 OCXO 1 ALARM +
1
7
10 OCXO 1 ALARM -
14
8
+15V
K902
Q908
3658
OCXO 1
STANDBY
YELLOW
FAIL
RED
DS902
R933
150
R934
0
Q907
3658
+5V
OCXO 2 ALARM
11 OCXO 2 ALARM +
1
7
12 OCXO 2 ALARM -
14
8
+15V
K903
Q911
3658
OCXO 2
STANDBY
YELLOW
FAIL
RED
DS903
R938
150
R939
0
Q910
3658
J906
+5V
DELTA F ALARM
13 DELTA F ALARM +
1
7
14 DELAT F ALARM -
14
8
+15V
K904
Q914
3658
DELAT F
OK
ALARM
GREEN
RED
R928
DS901
150
R944
0
6
Q913
3658
J908
+5V
DC ALARM
1
15 DC ALARM +
1
7
2
16 DC ALARM -
14
8
3
2-13
+15V
K905
6
AC ALARM
17 AC ALARM +
1
7
18 AC ALARM -
14
8
+15V
K906
OCXO SCHEMATIC
FIGURE10-28
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