{"id":2038,"date":"2019-11-30T12:23:41","date_gmt":"2019-11-30T12:23:41","guid":{"rendered":"http:\/\/rktelesystem.com\/rktplgroup\/?p=2038"},"modified":"2019-11-30T12:23:41","modified_gmt":"2019-11-30T12:23:41","slug":"passive-hydrogen-maser-standard","status":"publish","type":"post","link":"https:\/\/rktelesystem.com\/rktplgroup\/passive-hydrogen-maser-standard\/","title":{"rendered":"Passive Hydrogen Maser Standard"},"content":{"rendered":"

The Passive Hydrogen Maser is a compact hydrogen maser with excellent frequency stability and utilises state-of-the-art technology. Full digital processing of the modulation and servo loop signals makes it ideal for high accuracy applications. An internal GPS\/GLONASS option is available and provides automatic output signal frequency calibration.<\/p>\n

Key applications:<\/b>
\n– National Time Keeping Service
\n– Space tracking and navigation
\n– Verification of frequency signals
\n– Scientific research<\/p>\n

Specifications<\/b><\/div>\n

Output signals:<\/b>
\nSine: 5 MHz; 10 MHz; 100 MHz, (1\u00b10.2) V RMS into 50 \u03a9 load.
\nPulse: 2,048 MHz (square pulse), 1,5\u00f72,8 V (pp) into 75 \u03a9 (ITU-T G.703 part13).
\n1Hz; 1\/60 Hz, positive polarity pulse, width 10\u00b10.1 \u03bcs, TTL level at 50 \u03a9, rise time: <10 ns.<\/p>\n

Metrological characteristics are given in the table:<\/b><\/p>\n

<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Relative frequency accuracy<\/b><\/td>\n\u00b13\u00d710\u221213<\/sup>
\n(factory calibration)<\/td>\n		\u2264\u00b11\u00d710\u221213<\/sup>
\n(in option with GPS calibrator)<\/td>\n<\/tr>\n
Output signals frequency corrector<\/b><\/td>\nresolution
\nretuning range<\/td>\n		1\u00d710\u221215<\/sup>
\n1\u00d710\u221210<\/sup><\/td>\n<\/tr>\n
Frequency stability
\n(Allan deviation at 25\u00b11C\u00b0, environmental
\neffects are excluded)<\/b><\/td>\n		1 s<\/td>\n\u22645.0\u00d710\u221213<\/sup><\/td>\n<\/tr>\n
10 s<\/td>\n\u22642.0\u00d710\u221213<\/sup><\/td>\n<\/tr>\n
100 s<\/td>\n\u22645.0\u00d710\u221214<\/sup><\/td>\n<\/tr>\n
1 hour<\/td>\n\u22649.0\u00d710\u221215<\/sup><\/td>\n<\/tr>\n
1 day<\/td>\n\u22644.0\u00d710\u221215<\/sup><\/td>\n<\/tr>\n
Phase noise spectral density (dBc\/Hz)
\n(5 MHz output)<\/b><\/td>\n		Frequency offset<\/td>\nSpectral density (dBc\/Hz)<\/td>\n<\/tr>\n
1 Hz<\/td>\n\u2264\u2212105<\/td>\n<\/tr>\n
10 Hz<\/td>\n\u2264\u2212130<\/td>\n<\/tr>\n
100 Hz<\/td>\n\u2264\u2212145<\/td>\n<\/tr>\n
1000 Hz<\/td>\n\u2264\u2212155<\/td>\n<\/tr>\n
Manual synchronization to external 1 pps
\nTTL signal accuracy<\/b><\/td>\n		\u2264\u00b125 ns<\/td>\n<\/tr>\n
Time synchronization to UTC using GPS<\/b><\/td>\n\u2264\u00b150 ns (using optional GPS calibrator)<\/td>\n<\/tr>\n
Temperature sensitivity in temperature operating range
\n(10\u221235 C\u00b0)<\/b><\/td>\n		\u2264\u00b11\u00d710\u221214<\/sup>\u00a01\/C\u00b0<\/td>\n<\/tr>\n
Magnetic sensitivity<\/b><\/td>\n\u2264\u00b12\u00d710\u221214<\/sup>\u00a01\/Oersted<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Digital control and monitoring:<\/b>\u00a0all operating parameters on local LCD display, or also available remotely.
\nInterface:<\/b>\u00a0RS-232C; USB; LAN.
\nPower supply:<\/b>\u00a0100\u2013240 V AC, 50\u201360 Hz, or 22\u201330 VDC.
\nPower consumption:<\/b>\u00a0120 VA AC, 100 W DC.
\nOptions:<\/b>\u00a01.<\/b>\u00a0DC power supply 38.4\u201357.6 V (two inputs);\u00a02.<\/b>\u00a0Internal battery for autonomous operation;\u00a03.<\/b>\u00a0Internal GPS calibrator for automatic calibration.
\nDimensions (W\u00d7H\u00d7D):<\/b>\u00a0470 mm\u00d7200 mm\u00d7530 mm.
\nWeight:<\/b>\u00a033 kg.
\nWarranty:<\/b>\u00a03 years.
\nLife time:<\/b>\u00a015 years.<\/p>\n","protected":false},"excerpt":{"rendered":"

The Passive Hydrogen Maser is a compact hydrogen maser with excellent frequency stability and utilises state-of-the-art technology. Full digital processing […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"sfsi_plus_gutenberg_text_before_share":"","sfsi_plus_gutenberg_show_text_before_share":"","sfsi_plus_gutenberg_icon_type":"","sfsi_plus_gutenberg_icon_alignemt":"","sfsi_plus_gutenburg_max_per_row":"","footnotes":""},"categories":[18],"tags":[],"class_list":["post-2038","post","type-post","status-publish","format-standard","hentry","category-time-synchronization"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/posts\/2038","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/comments?post=2038"}],"version-history":[{"count":0,"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/posts\/2038\/revisions"}],"wp:attachment":[{"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/media?parent=2038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/categories?post=2038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rktelesystem.com\/rktplgroup\/wp-json\/wp\/v2\/tags?post=2038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}