Rb-Disciplined Frequency Standards

Rubidium Frequency Standards

Rubidium Atomic Frequency Standards are being used increasingly in telecommunication applications, particularly wireless telephone networks. With increased demand for cellular services but limited bandwidth, the requirement for precise timing becomes paramount. FEI manufactures a Rubidium Atomic Standard, a small, low cost, stable atomic “clock” which are ideally suited for use in advanced cellular communications base stations. Whether the network uses CDMA (Code Division Multiple Access), TDMA (Time Division Multiple Access) or GSM (Global System for Mobile Communications) or a hybrid, such as EDGE, timing to ensure signal synchronization, is of the essence. For detailed specifications on this line of products, download the PDF datasheet.

Model FE-5650A

Features
• Extremely small: 3x3x1.4 inches
• Digitally programmable to 1×10-13
• Frequency: 1 Hz to 20 MHz & 50.255+ MHz
• Stability over temperature: 3×10-10
• Stability: 1.4×10-11/
• 2×10-11/day 2×10-9/year

Model FE-5652A

Features
• Temperature range: -40° C to +85°C
• Stability over temperature: 5×10-11
• Digitally programmable to 1×10-13 
• Frequency: 1 Hz to 20 MHz
• Fast Warm-up: <5 min.
• Stability: To 5×10-12/2×10-10/year

Model FE-5660A

Features
• Standard output frequency is 5 or 10 MHz
• Short term: Allan Deviation 3×10-11/
• Long term: Aging 5×10 11/month
• Temperature: 3×10-10, -5° to +50° C

Model FE-5680A

Features
• Extremely low silhouette: less than 1.0 inch
• Stability over temperature: 5×10-11
• Digitally programmable to 1×10-13
• Frequency: 1 Hz to 20 MHz
• Fast Warm-up: <5 min.
• Stability: To 5×10-12/year to 2×10-10/year

FEI’s Legacy Rubidium Product Model FE-5600M

Features
• Fast Warm-Up
• MIL-E-5400 Class II
• Lightweight, Small, Rugged
• Raw Aircraft Power Operation
• Modular Construction

Military-Qualified Rubidium Crystal Oscillators

Rubidium Vapor Atomic Oscillators FEI’s Legacy Rubidium Product
Model FE-5600M

Features
• Fast Warm-Up
• MIL-E-5400 Class II
• Lightweight, Small, Rugged
• Raw Aircraft Power Operation
• Modular Construction

Traditional Rubidium Vapor Atomic Oscillators
Model FE-5650A

Features
• Extremely small: 3 x 3 x 1.4 inches
• Digitally programmable to 1 x 10-13
• Frequency: 1 Hz to 20 MHz & 50.255+MHz
• Stability over Temperature: 3 x 10-10
• Stability: 1.4 x 10-11/,
2 x 10-11/day  2 x 10-9/year

Special High Performance, High Temp, Low Phase Noise Rubidium Oscillators 
Model FE-5680A

Features
• Extremely low silhouette: less than 1.0 inch
• Stability over temperature: 5×10-11
• Digitally programmable to 1×10-13
• Frequency: 1 Hz to 20 MHz 
 Fast Warm-up: <5 min. 
• Stability: To 5×10-12/ to 2×10-10/year