Space Oven Controlled Crystal Oscillator
TE 425
OCXO series 425
For this product family, a full detailed specification can also be delivered on request.
Specific request can be addressed to RAKON
info@rakon.fr
Product Description
OCXO Space Plus is designed for Space Clocks, Navigation and Positioning Systems and is
used in such applications as GPS receivers, digital cards, board calculators, down and up
converters, synthesizers.
This frequency source is featured by remarkable overall frequency stability vs. temperature range up to +/-
0.5ppb under vacuum, +/- 20 ppb per year, power consumption at steady state of 2W under vacuum, and weight
of 120g. OCXOs.
Space Plus (50x50x30mm) is manufactured in accordance with
MIL-PRF-55310 (Class 1, type 4 & type 6, level S).
Features
•
•
•
•
•
•
Frequency Range : 10 MHz to 40 MHz
Supply Voltage : +10V , +12V or +15V
Warm up Consumption : 7 Watt max
Steady state Consumption : 2W under
vacuum and 4W under atmospheric
pressure
Frequency Stability vs. Operating
Temperature Range: +/– 1ppb under
vacuum
Ageing :+/– 0.2 ppm over 15 years typical
at 10MHz
•
•
•
•
•
Output Wave Form : sine 50 Ohms
Output Level : from 0 to 10 dBm
Component selected as per ECSS-Q-ST-60C
Materials selected as per ECSS-Q-70
Manufacturing in accordance with:
o
MIL-PRF-55310 (Class 1, type 4,
level S,B)
o
ECSS-Q-ST-70-08C and ECSS-Q-ST-
70-38C
Applications
•
•
•
•
Transponders
GPS receivers
Navigation
Converters
•
•
•
Board calculators
Synthesizers
FGU
Specifications
1.0
Line
Environmental conditions
Parameters
Conditions/remarks
Temperature option A
Min
0
-20
-40
-40
- 55
Nom
25
25
25
Max
50
65
65
85
125
Unit
°C
°C
°C
°C
°C
1.1
Operating Temperature
Temperature option B
Temperature option C
1.2
1.3
1.4
1.5
1.6
1.7
Switch-on Temperature
Non-Operating
Temperature
Random Vibration
Sine Vibration
Shocks
Radiation
TSo
TNOp
Level as per MIL-STD-202), Method 214, Condition I-J (46,30 Grms)
Level as per MIL-STD-202), Method 204, Condition D (20G)
Mechanical shock as per MIL-STD-202, Method 213, Condition E (half sine
with a peak acceleration of 1000g for duration of 0.5 msec)
TID : 100 kRad, low dose rate
No SEL up to LET=60 MeV/mg/cm²
October, 26th 2010
Shortform, 51000803.110, Issue A3
1/5
www.rakon.com
Space Oven Controlled Crystal Oscillator
TE 425
OCXO series 425
2.0
Line
Electrical interface
Parameters
Conditions/remarks
Supply option 1
Min
9.5
11.4
14.25
45
6.6
Vc
0
Nom
10
12.0
15
50
6.9
Max
10.5
12.6
15.75
55
7.2
6.9
Unit
V
V
V
Ω
V
V
2.1
Power supply
Supply option 2
Supply option 3
2.2
2.3
2.4
Load Impedance
Reference voltage
Control voltage
3.0
Line
3.1
3.2
3.3
3.4
3.5
3.6
Performances
Parameters
Nominal Frequency
Steady state input current power
Warm up supply power
Initial frequency accuracy
Frequency adjustment
Calibration option 2
Positive slope
Temperature option A
Frequency stability vs temperature
Temperature option B
Temperature option C
± 500
± 0.5
±1
± 10
± 0.1
± 0.1
± 50
Over 1 year
Over 15 years
Allan variance (10 MHz)
Frequency warm up
Output waveform
Output level
Harmonics level
Non harmonics level
Phase noise 10 MHz
1 Hz
10 Hz
100 Hz
1kHz
10 kHz or greater
EOL
2
Sine
10
-30
- 85
-105
-135
-145
-150
- 155
dBm
dBc
dBc
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
1s
± 20
± 150
0.002
30
Vacuum @ -20°C
Conditions/Remarks
Min
10
Typ
Max
40
3
7
± 10
Unit
MHz
W
W
ppb
ppb
ppb
ppb
ppb
ppb
ppb
ppb
ppb
ppb
ppb
mn
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
3.15
3.16
3.17
3.18
3.19
3.20
3.21
3.22
Frequency variation vs. supply voltage
Frequency variation vs. load
Frequency variation vs pressure
Frequency ageing (10 MHz)
Over Operating Temperature
Over Operating Temperature
October, 26th 2010
Shortform, 51000803.110, Issue A3
2/5
www.rakon.com
Space Oven Controlled Crystal Oscillator
TE 425
OCXO series 425
6.0
Model philosophy
Engineering
Model
Engineering
Qualification
Model
Qualification
Model
Flight
Model
Flight Model +
Lot
Acceptance
test
E,
(option I)
Representativeness
(option A)
(options B, C)
(option D)
(options
F, G, H)
Component
Crystal material
Passive
commercial
parts
Active parts
from the same
manufacturer of
HiRel parts
Swept quartz
Stabilized
Mil Grade parts
procured from
the same
manufacturer of
HiRel parts
HiRel Parts
HiRel Parts
HiRel Parts
Swept quartz
Stabilized
Flight
representative in
form-fit-function
Flight
design
Qualification
testing
Swept quartz
ESCC3501
Stabilized
Flight design
Mechanical
interface
Electrical interface
Tests
Flight
representative
in form-fit-
function
Flight
design
Acceptance
testing
Swept
quartz
ESCC3501
Stabilized
Flight design
Swept quartz
ESCC3501
Stabilized
Flight design
Flight design
Qualification
testing
(including
screening)
ECSS-Q-ST-70-08
& 70-38
Flight design
Acceptance
testing
(including
screening)
ECSS-Q-ST-
70-08 & 70-
38
Flight design
Acceptance
testing
(including
screening)+
LAT
ECSS-Q-ST-70-
08 & 70-38
Workmanship
IPC610
ECSS-Q-ST-70-08
& 70-38
7.0
Flight Model Screening according to MIL-PRF-55310
•
•
•
•
Full Level S (option E)
Level S with combined burn in aging of 480 hours (option F)
Full Level B (option G)
Level B with combined burn in aging of 480 hours (option H)
Lot Acceptance test could be performed on all screening options
8.0
Options for Engineering Qualification Model
•
Production manufacturing, qualification flow including qualification mechanical tests (option B)
•
Production manufacturing, electrical tests only (option C)
9.0
Deliverable documentation
•
Test data
•
Full specification
•
Certificate of Conformity (CoC)
October, 26th 2010
Shortform, 51000803.110, Issue A3
4/5
www.rakon.com
Space Oven Controlled Crystal Oscillator
TE 425
OCXO series 425
10.0
Ordering part number definition
The part number breakdown is defined as follows:
TE 425 E A 1 1 1 10M000000
RAKON
Series
Model
A = EM
B = EQM full environmental testing
C = EQM reduced environmental testing
D = QM
E = FM level S
F = FM level S with combined BI-aging
G = FM level B
H = FM level B with combined BI-aging
I = FM + group C
Temperature range/Stability
A = 0° to +50° ± 0.5 ppb
C
C,
B = -20°C to +65° ± 1 ppb
C,
C = –40° to +65° ± 10 ppb
C
C,
Supply voltage
1 = 10V
2 = 12V
3 = 15V
Frequency pulling
1 = internal calibration
2 = voltage controlled
Oven Alarm
0 = No
1 = Yes
Frequency,
fnom
October, 26th 2010
Shortform, 51000803.110, Issue A3
5/5
www.rakon.com
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