Symmetricom 5071A Primary Frequency Standard

The Symmetricom 5071A is the most accurate commercial atomic clock available. It has an accuracy of less than 5E−13 under all environmental conditions and no deterministic frequency drift. The capabilities and reliability of the 5071A make it the single largest contributor of cesium clocks—more than half of all contributing clocks—to Coordinated Universal Time (UTC). The 5071A is the world’s leading timing solution for strategic defense assets and critical civilian and government infrastructure, with the ability to deliver submicrosecond holdover for months at a time during Global Navigation Satellite System (GNSS) denial.

Key Features:

• Frequency Accuracy: ±0.001 ppb (standard performance), ±0.0005 ppb (high performance)
• Short-Term Stability:
• 1 second: 0.012 ppb
• 10 seconds: 0.0085 ppb
• 100 seconds: 0.0027 ppb
• 1000 seconds: 0.00085 ppb
• Phase Noise:
• 1 Hz: -100 to -106 dBc/Hz
• 10 Hz: -130 to -136 dBc/Hz
• 100 Hz: -145 dBc/Hz
• 1 kHz: -150 dBc/Hz
• 10 kHz: -154 dBc/Hz
• Frequency Stability: ±1 ppb
• Output Signals:
• RF: 5 MHz, 10 MHz, 100 kHz, and 1 MHz sinewave outputs
• 1 PPS: Three outputs
• Interfaces: RS-232-C, TTL
• Power Requirements:
• AC Supply: 100 to 240 VAC
• DC Supply: 22 to 42 V
• Power Consumption: 45 to 58 W
• Operating Temperature: 0 to 55°C
• Storage Temperature: -40 to 70°C
• Dimensions: 133.4 x 425.5 x 523.9 mm (H x W x D)
• Weight: 30 kg