D
ISCRETE
OCXO
|
H
IGH
-E
ND
T
ELECOM
OCXO
ROX5252T2
The ROX5252T2 belongs to a range of super single oven OCXOs designed as a compact and smart frequency source and time keeping
reference for all synchronization systems, including precision positioning system bases equipment. These 52 x 52 mm package series of
oscillators are designed with 2 circuits: 1 circuit with the crystal enclosed in a hermetic oven and 1 circuit with the amplifier stage. This
structure enables an excellent stability versus temperature (±0.2 ppb). This high end OCXO is capable of replacing expensive Rubidium clocks
in SDH/SONET Stratum 2 applications.
Features
Hold over below 5 µs over 24 hours,
including temperature change
Applications
Stratum 2 timing modules
Time and frequency references
Wireless Base Stations
( GSM,UMTS, CDMA, LTE)
Instrumentation and Broadcasting
52 x 52
mm
Standard frequencies: 10, 12.8, 13 and 15
MHz
2 package height : 19 mm and 25.4 mm
Standard Specifications
Parameter
Nominal frequency
Operating temperature range
Frequency stability over temperature
Free-run accuracy over 20 years
Supply voltage stability
24 hours holdover performance
-40
Min.
Typ.
5 - 15
Max.
85
±0.2
±0.04
±0.05
±5
Unit
MHz
°C
ppb
ppm
ppb
µs
Test Condition / Description
Standard frequencies: 10, 12.8, 13 and 15 MHz
Telcordia GR-1244 requirement is ± 4.6 ppm
±5% at 25°C
After 3 days of continuous power on, constant
load, no supply change and 50°C window in
operating temperature range, temperature
gradient ( 10 °C / hour)
Over -40 to +85°C, gradient 10°C / hour
After 1 week operation
Hysteresis effect
Long term stability (Ageing)
0.1
±0.05
±8
±40
±0.002
±5
5
8
3.5
±8
ppb
ppb/day
ppb/year
ppb/20 years
ppb
ppb
V
W
W
minutes
Short term 1s to 10s integration time
Retrace effect at 25°C
Supply voltage (V
CC
)
Power consumption
Warm-up time
After 24 hours off and 1hour on
±5%. Other option 12V
During warm-up
Steady state at 25°C calm air
Within 10 ppb of prior steady state output
frequency at time of power-off. 24 hours on min.
+ 24 hours off max.
Harmonics
Start-up time
Oscillator output - Sinewave
Oscillator output – Compatible CMOS
Output voltage level high (V
OH
)
Output voltage level low (V
OL
)
Rise & fall time
Environmental
Vibration
Shocks (3 directions)
Storage temperature
5
2.4
-40
1
9
dBc
sec
dBm
V
V
ns
g
g
°C
IEC 68-2-06 test Fc-Severity 500/10
IEC 68–2-27 test Ea severity 50A
Signal level with 50 Ω load
0.4
5
10
50
90
-55
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