home >> Precision laboratory frequency >> OSA3350 ePRC+ Optical cesium atomic clock
Product Description:
An increasing number of networks and applications require precise synchronization. Inaccurate timing can lead to poor performance or even system disruption. While GNSS (Global Navigation Satellite System) offers excellent accuracy, satellite-based timing is vulnerable to interference and spoofing, making it unreliable as the sole synchronization technology to rely on. Atomic clocks, known for their high accuracy and availability, provide an ideal backup for GNSS.
Our OSA3350 is the first commercially available optical cesium atomic clock designed specifically for ePRTC (enhanced Primary Reference Time Clock) applications. It achieves highly stable synchronization over an extended lifespan. With its advanced optical cesium technology, it offers higher accuracy, longer lifespan, and a more robust design compared to traditional magnetic cesium clocks. The OSA3350 surpasses the frequency stability requirements of the ePRCG.811.1 specification, enabling the deployment of ePRTC solutions that exceed the most stringent recommendations. By complementing satellite synchronization solutions with an ultra-stable atomic clock, the highest level of accuracy and reliability is ensured.
Key Advantages:
- Ultra-high stability and long lifespan
- Higher frequency stability and over twice the lifespan compared to traditional magnetic cesium clocks
Unique Innovations:
- Utilizes optical technology to efficiently utilize commercial cesium atoms for ePRC+ products
Compact Design:
- Compact and space-saving design suitable for cloud, core networks, and enterprise networks
RoHS Compliant:
- Fully compliant with the latest RoHS standards, ensuring a high level of environmental sustainability
Remote and Secure Management:
- Remote and secure management using SNMPv3, fully compatible with ADVA controllers
Analog Frequency Outputs:
- Number of analog outputs: 2
- Frequencies: 5MHz and 10MHz
- Signal format: Sine wave
- Connector: BNC
- Load impedance: 50Ω±5%
- Amplitude: >10dBm (minimum); 13dBm (typical)
- Harmonics: ≤ -40dBc
- Non-harmonics (spurious): ≤ -70dBc
Digital Frequency Output:
- Number of digital outputs: 1
- Signal format: Square wave
- Frequency: 2048MHz
- Connector: SMA
- Amplitude: < 2.5VPP @ 50Ω load
Timing Digital Output (1PPS):
- Number of 1PPS outputs: 4
- Frequency: 1 Hz
- Connector: BNC/F
- Signal format: Square wave LVCMOS
- Load impedance: 50Ω
- Amplitude: 5 Vpp, 50Ω load
- Jitter: ≤ 1ns RMS
- Rise time: ≤ 5ns (10% to 90%)
- Output squareness: Positive
Timing Synchronous 1PPS Input:
- Number of 1PPS inputs: 1
- Frequency: 1Hz
- Connector: BNC/F
- Signal format: Square wave LVCMOS
- Load impedance: 50Ω or 1MΩ (programmable)
- Amplitude: 2.5V; max. 5V
- Pulse width: 100ns-100μs
- Output squareness: Positive or negative (programmable)
Timing Synchronous 1PPS Output:
- Synchronization range: ±500μs
- One-time external synchronization resolution (1PPS input sync): ≤ ±10 ns
- Manual phase adjustment for 1PPS output
- 4 independent adjustable outputs
- Manual adjustment resolution: 1 ns
Power and Battery Options:
- Number of power modules: 2
- Full redundancy power
- Hot-swappable
- Automatic switch
- Steady-state power consumption: @ 25°C ≤ 60W
- Warm-up power consumption: ≤ 90W
Environmental:
- Operating temperature: 10°C – +50°C
- Non-operating temperature: -40°C – +70°C
- Operating relative humidity: 10% – 90% non-condensing
- Operating DC magnetic field: 0 Gauss to 2 Gauss in any direction
- In position fixed use (operation): EN 300 019-1-3, class 3.2
- Transportation: EN 300 019-1-2, class 2.2
- Storage: EN 300 019-1-1, class 1.1
- Altitude: 0 – 15,000 m
- Safety: IEC 62368-1
- EMC & ESD: EN 50081-1, EN 50082-1, IEC 801 parts 2,3,4,5,6
- CE compliant
- Fully RoHS compliant
Mechanical Parameters:
- Desktop or 19'' rack-mountable
- Width (with rack-mount ears): 450mm/482.6mm
- Depth: 510mm
- Height: 132mm
- Weight: 20kg
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Network Applications:
ePRC and ePRTC are suitable for communication and cloud service providers, power companies, enterprises, and government organizations.
High-precision and stable frequency sources compliant with PRC G811/ePRC G811.1
ePRC+/ePRTC+ communication network solutions combining satellite-based timing and primary clocks
Replaces magnetic cesium clocks for higher accuracy and longer lifespan
Application in cloud and power with GNSS high-stability backup
Cloud service providers, enterprises, and government and defense organizations benefit from the highest accuracy and extended lifespan
Technical Specifications:
Frequency Accuracy and Configurability:
- Frequency accuracy (factory): ≤ ±1×10-12
- Frequency repeatability after power cycling: ≤ ±1×10-12
- Frequency setting resolution: ±1×10-15
- Frequency setting range: ±1×10-9
- Frequency stability of the output surpasses ITU-T standards
OSA 3350 ePRC+ exceeds 811.1 ePRC, and when used in conjunction with OSA ePRTC, the solution can provide holdover of up to 35ns over 14 days, compared to the 70ns specified in G.8272.1 ePRTC.
Comparison of 811.1 MTIE ePRC vs. OSA ePRC+:
Preheat Time:
60 minutes @ 25°C
Telecom BITS Output:
BITS Output Quantity: 4
Signal compliance with ITU-T G.703
Signal type: E1
Line code: HDB3
Frame type: CAS with CRC4
SSM support
Connectors:
- 2 x BNC: 2048MHz
- 2 x RJ-48: E1
Impedance: 120Ω @ RJ-48; 75Ω @ BNC
Analog Frequency Output:
Analog Output Quantity: 2
Frequency: 5MHz and 10MHz
Signal format: Sine wave
Connector: BNC
Load impedance: 50Ω±5%
Amplitude: >10dBm (minimum); 13dBm (typical)
Harmonics: ≤ -40dBc
Non-harmonics (spurious): ≤ -70dBc
Management Features:
Status LEDs:
- 3x (Alarm-Status-Power)
- On the front panel (management card)
Alarm Relays:
- Alarm relays: 3
- Maximum rating: U = 50 VDC, I = 250 mA
- Connector: SUB-D 9/F
- On the front panel (management card)
Local Management Port:
RS-232C
Connector: SUB-D9/M
Port Configuration: Baud rate 115200 bps
Port Configuration: 8 data bits, 1 stop bit
Port Configuration: No parity, no handshake
Management Commands: CLI
Management Software: Windows GUI
Remote Management Port:
Remote Management Port: Ethernet - TCP-IP
Connector: RJ45
Management Commands: SNMPv2/v3 (including authentication and encryption)
Management Software: Ensemble Controller, Ensemble Sync Director
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Documentation
OSA3350 ePRC+ Optical cesium atomic clock【PDF】data
PDF
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PNT stands for Positioning, Navigation, and Timing
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Bd Star is a national high-tech enterprise specializing in Beidou GPS timing and navigation industry. The company is dedicated to the research and development, design, production, and sales of system solutions such as standard time timing
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BdSTAR TIME seamless switching technology for redundant reference sources includes several technical components such as high-precision phase-shifting technology, reference clock, FPGA, integrated analog stretching, asynchronous serial communication, parameter storage, and master clock output.
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The core technology team of the company has many years of research and development experience in the field of timing and frequency. They possess multiple key core technologies in high-precision timing, PNT combination, frequency measurement, control, optical fiber time-frequency transfer, recovery, and maintenance.
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