DATA SHEET MHM 2010 Active Hydrogen Maser Key Features • Patented magnetic quadrapole for superior atomic beam focusing • Very low hydrogen usage for extended maintenance-free operation • Demonstrated lifetime of greater than 20 years • Unique, stand-alone, cavity auto tuning feature for exceptional long-term standalone stability • Proprietary Teflon coating technique, eliminating any re-coating requirement and extending maintenance free life • CE compliant • A low phase noise option for superior short-term stability in an active hydrogen master • Two year standard warranty Applications • Scientific frequency reference source • National time keeping service • Radio astronomy: VLBI, VLBA The Microsemi® MHM 2010™ is the world's most widely installed active hydrogen maser for applications that require extreme frequency stability, low phase noise and long service life. It is the only commercially available active hydrogen maser with stand-alone cavity switching auto tuning manufactured in the USA. This technique enables the MHM 2010 to deliver long-term stability normally only attributed to the most stable of cesium atomic standards. Hydrogen masers operate on the principle that when hydrogen atoms are provided the proper environment, they emit radiation of a precise frequency (1420 MHz) and spectral line width (21 cm). Phase locking this extremely small power, high purity signal to a very high performance quartz oscillator, provides the user with incredible long-term stability, as well as excellent phase noise. • Deep space tracking and navigation • GNSS/GPS satellite monitoring Active masers are typically 4 times more stable than passive hydrogen masers and 100 times more stable than high performance cesium. Active maser advantages in metrology include very low clock noise (eliminating the necessity for reference clock noise corrections) and 10,000 times shorter interval to reach a specified frequency stability compared to high performance cesium. Auto-Tuning The MHM 2010 incorporates an automatic frequency control system to maintain the cavity at a constant frequency relative to the hydrogen emission line. This technique enables the MHM 2010 to deliver long-term stability normally only attributed to the most stable of cesium atomic standards. Environmental Sensitivity The MHM 2010 is designed to for low sensitivity to temperature, magnetic field and power supply changes. Outputs The MHM 2010 provides multiple 5, 10, 100MHz outputs and 1PPS. Multiple configurations can be ordered to optimize for varied applications. Low Phase Noise Output Option The MHM 2010 can be factory configured with low phase noise outputs that enable higher resolution measurements in VLBI applications and provide improved reference signals for master timing systems. Users looking for extreme longterm stability no longer must trade off short-term stability. Each MHM 2010 is manufactured to exacting quality standards and carefully checked at each stage to insure a top quality product. Once built, the units are subjected to extensive performance testing, verifying all aspects of operation. All maser product design, manufacturing and testing are confucted at a Microsemi facility dedicated to these operations. Page 1 of 2 DATA SHEET MHM 2010 Low lifetime cost of ownership, maintenance free operation Lifetime cost of ownership for active masers is a critical consideration. The MHM 2010 is designed for long life and low maintenance. The hydrogen supply is adequate for over 20 years of operation. An efficient hydrogen states selector minimized the load on ion pumps (< 0.01 mole per year), and the pumps themselves are designed for greater than 20 year life at nominal hydrogen flux. The Teflon bulb coating virtually eliminates any recoating requirement and has a demonstrated life of over 20 years. Should it be required, the MHM 2010 is designed for on-site module replacement. .. .. .. .. MHM 2010 Back Panel Configuration * Battery pack not included Microsemi Corporate Headquarters One Enterprise, Aliso Viejo CA 92656 USA Within the USA: +1 (800) 713-4113 Outside the USA: +1 (949) 380-6100 Sales: +1 (949) 380-6136 Fax: +1 (949) 215-4996 E-mail: [email protected] .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. STABILITY .. .. Allan deviation (measured in 0.5Hz bandwidth}: .. Standard Low Phase Noise Option .. 1s 1.5E-13 8.0E-14 .. 10s 2.0E-14 1.5E-14 .. .. 100s 5.0E-15 4.0E-15 .. 1,000s 2.0E-15 2.0E-15 .. .. 10,000s 1.5E-15 1.5E-15 . Floor* <1.0E-15 Typical <1.0E-15 Typical .. . Long term: <2.0E-16 per day* <2.0E-16 per day* .. .. Auto tuning: no external reference required .. .. * Typically achieved after extended period of unperturbed, .. continuous operation. Temperature variation: ±0.25°C. .. Relative humidity: ±10% .. .. .. ENVIRONMENTAL .. • Temperature sensitivity: <1.0E-14/°C .. •Magnetic sensitivity: <3.0E-14/Gauss .. .. •Power source sensitivity: <1.0E-14 .. .. .. CONTROL .. • Synthesized frequency resolution: 7.0E-17 .. .. • Frequency control range: 7.0E-10 .. Note: The synthesizer maintains continuous phase .. throughout frequency change. .. .. .. AVAILABLE OUTPUTS .. .. Frequency Amplitude .. 5 MHz 13dBm .. .. 10 MHz 13dBm .. 100 MHz 13dBm .. .. •Load impedance: 50Ω .. .. .. TIMING OUTPUT .. •Format: 1PPS (positive going pulse) . •Amplitude: >3 V into 50Ω (TTL compatible) .. .. •Pulsewidth: 20 µs .. .. •Rise time: <3 ns .. •Jitter: <10 ps RMS .. .. .. TIMING INPUT .. •Auto-sync input: 1PPS .. •Amplitude: >3 V into 50Ω (TTL compatible) .. .. •Pulsewidth: ≥20 µs .. .. •Rise time: <5 ns .. •Jitter: <1 ns RMS .. .. •Synchronization .. input to output: <15 ns .. .. .. PHASE NOISE £(f) .. •Outputs 5 MHz 10 MHz 100 MHz .. 1 Hz ≤-116dBc ≤-110dBc ≤-90dBc .. 10 Hz ≤-135dBc ≤-129dBc ≤-109dBc .. . 100 Hz ≤-148dBc ≤-142dBc ≤-122dBc .. . 1 kHz ≤-155dBc ≤-149dBc ≤-129dBc .. . 10 kHz ≤-155dBc ≤-149dBc ≤-129dBc .. . 100 kHz ≤-155dBc ≤-149dBc ≤-129dBc .. .. SPECIFICATIONS LOW PHASE NOISE OPTION •Outputs 1 Hz 10 Hz 100 Hz 1 kHz 10 kHz 100 kHz 5 MHz 10 MHz ≤-130dBc ≤-124dBc ≤-150dBc ≤-138dBc ≤-158dBc ≤-146dBc ≤-160dBc ≤-150dBc ≤-160dBc ≤-153dBc ≤-160dBc ≤-153dBc POWER • Operating voltage: •Frequency range: •Peak power: •Operating power: •External DC input: •Standby battery pack: 100 MHz ≤-102dBc ≤-117dBc ≤-126dBc ≤-133dBc ≤-134dBc ≤-134dBc 85 to 264 VAC 47 to 63 Hz 150W 75W 22 to 28 VDC 3.1A (typical) 8 hours operation PHYSICAL SPECIFICATIONS • Height: •Width: •Depth: •Weight: 42.0” (106.68 cm) 18.0” (45.72 cm) 30.0” (76.0 cm) 475 lbs. (without batteries*) * Add 66 lbs. for batteries ORDERING INFORMATION (Number of ports in parentheses) Part No. • (3) 5 MHz, (1) 10 MHz, (1) 100 MHz •(3) 5 MHz, (1) 10 MHz, (2) 100 MHz •(3) 5 MHz, (1) 10 MHz, 1 PPS Sync. 1PPS output •(3) 10 MHz, 1 PPS Sync. (2) 1PPS output •(2) 5 MHz, (1) 100 MHz, 1 PPS Sync. 1PPS output •(2) 5 MHz, (2) 10 MHz, 1 PPS Sync. (2)1PPS output •(2) 5 MHz, (2) 10 MHz, (1) 100MHz •(2) 5 MHz, (1) 10 MHz, (1) 100MHz, 1 PPS Sync, 1PPS output •(3) 5 MHz, (2) 10 MHz, (2) 100MHz •(3) 5 MHz, (3) 10 MHz •(4) 5 MHz, (2) 10 MHz •(3) 10 MHz, (2) 100MHz,1 PPS Sync, (2) 1PPS output •(3) 5 MHz, (1) 10 MHz, (2) 100MHz, 1 PPS Sync. 1PPS output •(3) 5 MHz, (1) 10 MHz, (1) 100MHz, 1 PPS Sync, (2) 1PPS output • Low Phase Noise option 75001-101 75001-102 75001-103 75001-104 75001-105 75001-106 75001-107 75001-108 75001-109 75001-110 75001-111 75001-112 75001-113 75001-114 Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for communications, defense and security, aerospace, and industrial markets. Products include high-performance and radiation-hardened analog mixed-signal integrated circuits, FPGAs, SoCs, and ASICs; power management products; timing and synchronization devices and precise time solutions, setting the world’s standard for time; voice processing devices; RF solutions; discrete components; security technologies and scalable anti-tamper products; Power-over-Ethernet ICs and midspans; as well as custom design capabilities and services. Microsemi is headquartered in Aliso Viejo, Calif. and has approximately 3,400 employees globally. Learn more at www.microsemi.com. © 2014 Microsemi Corporation. All rights reserved. Microsemi and the Microsemi logo are trademarks of Microsemi Corporation. All other trademarks and service marks are the property of their respective owners. DS/MHM2010/082714 900-00479-000C