CTS
Reeves
FREQUENCY PRODUCTS
Model 1811
High Stability OCXO
CRYSTALS
Features:
• High Stability
• Low Phase Noise
• Low Dynamic Acceleration Sensitivity
• Oven Monitor
Designed as a replacement for the Hewlett Packard
10811E, the Model 1811 features excellent long and
short term stability. The product has a sinewave output
with very low phase noise content. Attention was given
to SC crystal mounting design and internal mechanical
design to enhance phase noise performance under
vibration. The EFC (electronic frequency control) allows
for fine frequency adjustment or PLL applications.
CLOCKS
VCXOs
Electrical Specifications:
Parameter
Input Voltage:
Oscillator
Oven
Available Frequencies
10.0 MHz
+12.0 Vdc
±1
Vdc
25 Vdc
±5
Vdc
10 Watts max.
2 Watts Typical
Sinewave, 0.55 Vrms
±0.05V
1 Vrms
±0.2V
-25 dBc
±1
x 10
-8
in 15 minutes
Offset
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
Standard
-90
-120
-140
-155
-155
<2 x 10
-10
/percent
Low Noise
-100
-130
-150
-163
-165
Supply Current - Warm-up
Steady State @ -40°C
Output
Harmonics
Warm-up (25°C)
Referenced to the frequency @ 24 hrs.
Phase Noise
(dBc/Hz)
(1 Hz Bandwidth)
into 50 Ohms
into 1000 Ohms
TCXOs
Frequency vs Power Supply (±5%)
Frequency Adjustment:
Mechanical
Electrical (EFC)
Tip Over (2G)
Oven Monitor
Normal Operating
Warm-up or Fault
OCXOs
Sufficient for 10 years
>1 x 10
-7
for -5 Vdc to +5 Vdc
<4 x 10
-9
= approx. 1 Vdc
= Oven Voltage
400 REIMANN AVE.
•
SANDWICH, IL 60548
Phone: 815-786-8411
•
Fax: 815-786-3600
•
E-Mail: www.ctsreeves.com
113
CTS
Reeves
CRYSTALS
FREQUENCY PRODUCTS
Model 1811
High Stability OCXO
CLOCKS
Mechanical Specifications:
Case:
Metal, CRS Nickel Plated
Solderability:
95% solder coverage, using RMA flux 63
SN/37 Pb at +245°C
±5°C
Temperature:
Operating: See chart
Storage: -55° to +85°C
Vibration:
0.4 inches peak to peak, 5 to 55 Hz
Mechanical Shock:
30 G's 11ms
VCXOs
TCXOs
Leads:
Kovar, solder coated
Seal:
Non-hermetic
Connectors:
SMB for output and EFC
Ordering Information:
Model Type 1811___ ___ ___ ___ ___ ___ ___ ___
Temp. Range
Temp Stability
(see note)
Temp Range
Code
0° to +50°C
A
0° to +71°C
B
-30° to +71°C
C
Stability
±4.5
x 10
-9
A
X
X
±1
x 10
-8
B
X
X
X
Aging
Phase Noise
Freq. in MHz
Phase Noise Code
Standard
A
Low Noise
B
OCXOs
1
st
Year Aging Per Day Aging Code
±1
x 10
-7
±5
x 10
-10
A
-7
-9
±2
x 10
±1
x 10
B
Note: Not all Options are Available at all Frequencies. Consult Factory for Details.
114
400 REIMANN AVE.
•
SANDWICH, IL 60548
Phone: 815-786-8411
•
Fax: 815-786-3600
•
E-Mail: www.ctsreeves.com
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