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OSA 3235BMetrological cesium atomic clock

Performance better than ITU-T G.811/Stratum 1 PRC

Set up connection interfaces before and after

3U high (133mm/5.24 ") -300mm deep, compatible with ETSI and 19" standard cabinets

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Metrological Digital Cesium Reference Clock Source

In recent years, there have been increasingly stringent requirements for time and frequency reference sources in scientific research. The specifications of cesium atomic standards have also been continuously improved. The emergence of compact and easy-to-operate high-performance cesium clocks provides a flexible choice to meet the strict requirements of navigation, communication, timing systems, and other fields.

The OSA 3235B cesium clock is an atomic frequency standard that utilizes the hyperfine transition of ground-state cesium-133 atoms. It is designed and manufactured using the latest technology, featuring a compact and small form factor. Thanks to its small size, the OSA 3235B offers unparalleled operability in the market. Combined with its long-life cesium tube, the performance of the OSA 3235B meets our long-term requirements.

Cesium Clock Performance Parameters

• Frequency Accuracy: ±1x10-12

• Frequency Reproducibility: ±1x10-12

• Short-term ADEV:

- 1s: 1.2x10-11

- 10s: 8.5x10-12

- 100s: 2.7x10-12

- 1,000s: 8.5x10-13

- 10,000s: 2.7x10-13

- 100,000s: 8.5x10-14

- Background: 5x10-14

• Configurability:

- Resolution: ＜±1x10-15

- Range: 1x10-9

• Warm-up Time: 45 minutes (25°C)

Mechanical Characteristics

• 19″: 3U, 132 x 436 x 400mm (Height x Width x Depth)

- Including front and rear panel connectors and 23″ rack adapters

• Desktop enclosure: Optional

• Weight: ＜15kg (excluding packaging)

Environmental Requirements

• Operating Conditions: EN 300 019-1-3, class 3.2

- Extended temperature range: -5°C to +55°C

• Transportation: EN 300 019-1-2, class 2.2

• Storage: EN 300 019-1-1, class 1.1

• Humidity: Not exceeding 95%

• Altitude: 0-15,000m

• DC Magnetic Field: Not exceeding ±2 Gauss

• Safety: EN 61010-1

• EMC & ESD: EN 50081-1, EN 50082-1, IEC 801 parts 2,3,4,5,6

• CE Compliance

Front Panel LED Indicators

• Monitoring: Three LEDs on the front and rear panels, monitoring power status, operational status, and alarm status

Management and Communication Expansion (Optional)

Communication Ports

• Management Port: RJ45 (Supports Ethernet TCP/IP)

• Time (TOD): 1 x DB9 (Male), 1 x DB9 (Female) with programmable switch

• Display: 5.7″ LCD (Front panel)

Output

Direct output: 5MHz 10MHz

Output level: 1Vrms

Output phase noise:

±0.2@50Ω 1Vrms ±0.2@50Ω

1Hz -95dBc/Hz -90dBc/Hz

10Hz -125dBc/Hz -120dBc/Hz

100Hz -140dBc/Hz -135dBc/Hz

1kHz -150dBc/Hz -145dBc/Hz

Auxiliary output: Analog clock output

Number of ports: 1 3

Frequency: 0.1-50MHz 1PPS/1/5/10MHz

Output level: Typical 500mVrms @50Ω

Minimum 250mVrms ≥3V @50Ω

Output waveform: Sinusoidal Square wave or pulse

Port type: Precision coaxial cable interface BNC Precision coaxial cable interface

Synchronization input

Quantity: 2 (1 front panel, 1 rear panel)

Input type and port: 1PPS TTL (≥3V) - BNC

Output expansion module (optional)

Programmable analog output

Quantity: 1

Controllable frequency: 0.1 - 50 MHz

Output level: Typical 500mVrms @50Ω (minimum 250mVrms)

Port: Precision coaxial cable interface 75Ω (T1: DB-9 100Ω)

Programmable telecommunication output

Number of ports: 4

Frequency: Configurable: 2.048 MHz / E1 / T1 / 1PPS / 10MHz

Output level: G703

Port type: BNC 75Ω (T1: DB-9 100Ω)

Power input

Voltage:

• 230V AC (88V-264VAC 50-60Hz)

• 48V DC (Voltage fluctuation range: 20V - 60V)

• Dual-circuit power supply

• Power consumption: 60W at 25°C (up to 70W during warm-up phase)

Optional backup battery

• Built-in battery supports device operation for 45 minutes in case of power failure

Management

Communication ports

Ports: 2 x RS232 (1 front panel, 1 rear panel), supporting local and SyncView PlusTM remote management.

Alarms

Relay nodes: 3 alarm indicators.

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PNT stands for Positioning, Navigation, and Timing
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
Experienced
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.
Requirement customization
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.
Philosophy
"Our team of experts is committed to providing you with the best industry solutions, reducing project costs, and saving your valuable time. Additionally, our ability to design and use various timing and navigation components enables us to develop customized products for various special applications."

OSA 3235BMetrological cesium atomic clock