CONTACT US

Our Address

Science Avenue, High-tech Zone, Zhengzhou City, Henan Province, China

  • Frequency Standards. Rubidium OXCO

    The DA101010-03 is a crystal standard with a high stability OXCO as the frequency reference. There are also ten sinewave and two squarewave outputs. The internal frequency reference has a daily aging rate of 2 x 10-10 per day.

  • Simple 10 MHz Frequency Standard - arachnoid

    The frequency standard uses the Siglent front-panel USB connector for power, and its output (Figure 3, right) is connected to the 10 MHz external clock BNC connector at the back of the generator. I drilled a hole in the top of the project box so I could adjust calibration potentiometer R1 without having to disassemble the device.

  • A Brief Notes To Time/Frequency Standards - An Introduction

    Cesium (caesium) Standard: The cesium standard is the primary standard of time/frequency. It is the standard maintained by over 250+ atomic stations around the world for keeping the UTC. The commercially available primary standards have an accuracy of ± 1 in 10 11. Rubidium Standard: Rubidium is known as the secondary standard for time ...

  • Standard frequency and time signal service - Wikipedia

    Standard frequency and time signal service (short: SFTS) is – according to Article 1.53 of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as «A radiocommunication service for scientific, technical and other purposes, providing the transmission of specified frequencies, time signals, or both, of stated high precision, intended for general reception.»

  • Frequency standards, GPS-synchronized, stand-alone, and ...

    As an in-house reference standard for calibration or as the master clock for test instruments, the GPS-12R provides a continuous stable and accurate frequency standard. The GPS-12R/HS with optional 1, 5, 10 MHz outputs is the ideal precision reference standard for use in; metrology, radar antenna array systems, public utilities, and the ...

  • 10MHz Frequency standard ZachTek

    This frequency standard can be used a time-base in the lab or to drive RF synthesizer and for various other applications were a stable calibrated Frequency standard is needed.It has four buffered outputs so it can directly drive up to four instruments.Internally there is a miniature ovenized quartz oscillator with a stability of 10ppb (parts per billion) guarantied – but typically it is ...

  • Frequency Standards - The Wireless Messaging News

    Frequency standards are intimately connected with developments in all of these and many other

  • FREQ.CALLPOWERDISTANCE2500 kHzWWV WWVH2.5 KW 5 KW358 Miles 3070 Miles3330 kHzCHU3 KW1830 Miles3810 kHzHD2 IOA1 KW3375 Miles4996 kHzRWMUnknown5550 Miles查看smeter.net的所有15行
  • HF Time and Frequency Standard Stations - S-Meter

    15 行  HF Time Frequency Standard Stations The stations below are widely used to check current

  • Time Frequency Standards EndRun Technologies

    Frequency Accuracy is < 6 x 10-14 to UTC(USNO) for 100,000 seconds. No frequency steps - guaranteed. Reliable MTBF up to 30+ years. High-bandwidth NTP server (7500 packets per second). Dual-gigabit Ethernet ports with security-hardened network interface and protocols (SSH, HTTPS, SNMP V3). 1PPS and Time Code are standard outputs.

  • Frequency standards, GPS-synchronized, stand-alone, and ...

    As an in-house reference standard for calibration or as the master clock for test instruments, the GPS-12R provides a continuous stable and accurate frequency standard. The GPS-12R/HS with optional 1, 5, 10 MHz outputs is the ideal precision reference standard for use in; metrology, radar antenna array systems, public utilities, and the ...

  • Frequency Standards - free running frequency standards

    Cesium Clock - atomic frequency standard is specifically designed and produced with the latest technology in a very compact and reduced size: QFS-106: High performance, cost effective, free running frequency standard using either an ovenized quartz or rubidium oscillator to create the low aging, short and long term frequency stability needed.

  • PA0JME - amateur radio frequency standard project

    PE1CQQ frequency standard project. Brook Shera's frequency standard project. Luis Cupido "ref lock" project. DK7NT GPS ZDF controlled oscillator- part 1. DK7NT GPS ZDF controlled oscillator - part 2. The fact that some TV transmitters use a very accurate picture timing derived from atomic standards is also very attractive.

  • 10MHz OCXO Crystal Oscillator Frequency Standard Reference ...

    10MHz OCXO Crystal Oscillator Frequency Standard Reference with Board 7DBM SMA. $64.58. $67.98. Free shipping . 10MHz OCXO Crystal Oscillator Frequency Reference with Board X-FREE. $51.29. Free shipping . Picture Information. Opens image gallery. Image not available. Mouse over to

  • 卖家评价: 98.4% 好评
  • Time Frequency Standards EndRun Technologies

    Frequency Accuracy is < 6 x 10-14 to UTC(USNO) for 100,000 seconds. No frequency steps - guaranteed. Reliable MTBF up to 30+ years. High-bandwidth NTP server (7500 packets per second). Dual-gigabit Ethernet ports with security-hardened network interface and protocols (SSH, HTTPS, SNMP V3). 1PPS and Time Code are standard outputs.

  • frequency standard eBay

    586 results for frequency standard Save frequency standard to get e-mail alerts and updates on your eBay Feed. Unfollow frequency standard to stop getting updates on your eBay Feed.

  • Ultra-Precise GPS Frequency Reference EndRun Technologies

    The Meridian II Precision TimeBase is a modular, network-centric, time frequency standard that provides the most precise and stable, GPS-synchronized, time frequency outputs in the world. Unlike our competitors, we fully specify the performance of Meridian II and back it up with published data measured at NIST. Yes.

  • 10MHz OCXO Frequency Standard Module or Kit from IR ...

    This option includes a complete 10 MHz frequency standard calibrated over a 4 hour period using our rubidium standard, 10 digit Frequency counter and Oscilloscope. The 10 MHz output is via 1 BNC connector, soldered into the centre footprint, by default. The OCXO will be one selected at random from the list of models above.

  • GPS Frequency Reference Standard - Fluke Cal

    GPS Frequency Standard - The cesium controlled frequency standard that uses GPS technology and connectivity to provide primary standard traceability from any location The 910 and 910R GPS frequency references are fully traceable and extremely accurate gps frequency standards and are ideally suited for use in many applications, including ...

  • Frequency Standard for sale in UK View 57 bargains

    Datum LPRO Rubidium Frequency Standard 10MHz P/N:1 . Precision high frequency standard resistance box untested. vintage emi frequency test tape - speed 7.5" sec c. This is an auction for a frequency standard we no longer need it. Product is located in

  • Cesium Clock and Frequency References Microsemi

    Dependable, reliable, accurate and stable frequency standards for navigation, communications and timing applications. Cesium beam frequency and time standard instruments from Microsemi meet the most stringent requirements demanded by commercial, military and space applications.

  • GPS Frequency Standard - techlib

    This simple frequency standard uses the 1PPS available from many GPS receivers to lock a stable oven-controlled oscillator, holding a few hundred uHz of accuracy from moment to moment depending on the quality of the oscillator. (My old "Small Fry" wanders under +- 2 x 10-11.) It's a "nearly" analog circuit using three logic chips to perform ...

  • SIMPLE 10 MHZ GPS FREQUENCY STANDARD AND RF

    The simple GPS frequency standard and RF generator. Simple GPS frequency standard and RF generator My first frequency standard is built up around a GPS receiver module, model NEO-6M, type NEO-6M-0-001 of the company "u-blox AG". The disadvantage is however that it can generate a maximum reference frequency of 1 kHz.

  • GPS Locked Frequency Standard Project - YouTube

    May 01, 2017  U blox Neo 7m Gps Module For Frequency Standard - Duration: 8:36. Ken Chase 9,861 views. 8:36. Using a GPS module as variable frequency reference standard - Duration: 40:48.

  • SIMPLE 10 MHZ GPS FREQUENCY STANDARD AND RF

    The simple GPS frequency standard and RF generator. Simple GPS frequency standard and RF generator My first frequency standard is built up around a GPS receiver module, model NEO-6M, type NEO-6M-0-001 of the company "u-blox AG". The disadvantage is however that it can generate a maximum reference frequency of 1 kHz.

  • GPS Frequency Reference Standard - Fluke Cal

    GPS Frequency Standard - The cesium controlled frequency standard that uses GPS technology and connectivity to provide primary standard traceability from any location The 910 and 910R GPS frequency references are fully traceable and extremely accurate gps frequency standards and are ideally suited for use in many applications, including ...

  • GPS Frequency Standard - techlib

    This simple frequency standard uses the 1PPS available from many GPS receivers to lock a stable oven-controlled oscillator, holding a few hundred uHz of accuracy from moment to moment depending on the quality of the oscillator. (My old "Small Fry" wanders under +- 2 x 10-11.) It's a "nearly" analog circuit using three logic chips to perform ...

  • The Three Dollar Frequency Standard Hackaday

    Jul 26, 2015  19 thoughts on “ The Three Dollar Frequency Standard ” voja antonic says: July 26, 2015 at 3:26 am I use Maxim’s TXCO type DS32kHz (price 7€) in my clock, and sometimes I compare it to ...

  • PTS - Time and Frequency Standard

    The PTS is a state of the art frequency instrument using a disciplined atomic clock to offer a wide range of features and time and frequency outputs accurate to <20nsrms to UTC (USNO) and 1x10-12 respectively. This product is both economic and very reliable, offering complete remote control and monitoring via a web-browser based interface.

  • GPS Locked Frequency Standard Project - YouTube

    May 01, 2017  U blox Neo 7m Gps Module For Frequency Standard - Duration: 8:36. Ken Chase 9,861 views. 8:36. Using a GPS module as variable frequency reference standard - Duration: 40:48.

  • 作者: Richard Jugel
  • A Simple 10 MHz Frequency Standard : amateurradio

    A good frequency standard should be part of every well equipped ham shack. I use a GPSDO for my standard. Super handy gadget. Has two outputs and is perfect for use as a standard on rigs that accept an external 10Mhz reference input. Also very handy for adjusting standard rig oscillators or checking TCXO upgrades for proper adjustment during ...

  • Time and Frequency Standard Station Information

    Additional Information. Beehler, R.E., and M.A. Lombardi. NIST Time and Frequency Services. NIST Special Publication 432 (2002 Edition). Covers Radio Stations WWV, WWVH, WWVB, GOES Satellite Time Code and Automated Computer Time Service (ACTS)

  • Cesium Clock and Frequency References Microsemi

    Dependable, reliable, accurate and stable frequency standards for navigation, communications and timing applications. Cesium beam frequency and time standard instruments from Microsemi meet the most stringent requirements demanded by commercial, military and space applications.

  • Frequency Standard for sale in UK View 57 bargains

    Datum LPRO Rubidium Frequency Standard 10MHz P/N:1 . Precision high frequency standard resistance box untested. vintage emi frequency test tape - speed 7.5" sec c. This is an auction for a frequency standard we no longer need it. Product is located in

  • Navy Frequency Time Standard Equipment Frequency ...

    This standard provided frequency control for many transmitters and receivers. An important difficulty encountered in developing the system was the lack of provision of means for controlling the outputs of the individual equipments, should the precise central standard fail or the transmission line to an individual equipment be disrupted.

  • Chapter 17: Fundamentals of Time and Frequency

    The standard unit for frequency is the hertz (Hz), defined as events or cycles per second. The frequency of electrical signals is often measured in multiples of hertz, including kilohertz (kHz), megahertz (MHz), or gigahertz (GHz), where 1 kHz equals one thousand (10 3

  • FREQUENCY CALLIBRATION USING HF WWV

    strength at your location and which is the same frequency as your standard (typically 1 or 10MHz) or a harmonic (eg. 10MHz WWV will work for a 1, 2, 5, or 10MHz.) • Tune in WWV in AM mode and note the S meter reading. • Loosely couple the output from your standard to the

  • Standard deviation calculator (statistics)

    How to enter data as a cumulative frequency table? Similar as frequency table, but instead f: type cf: in second line. For example: 10 20 30 40 50 60 70 80 cf: 5 13 20 32 60 80 90 100 The cumulative frequency is calculated by adding each frequency from a frequency

  • A Simple 10 MHz Frequency Standard : amateurradio

    A good frequency standard should be part of every well equipped ham shack. I use a GPSDO for my standard. Super handy gadget. Has two outputs and is perfect for use as a standard on rigs that accept an external 10Mhz reference input. Also very handy for adjusting standard rig oscillators or checking TCXO upgrades for proper adjustment during ...

  • frequency standard eBay

    586 results for frequency standard Save frequency standard to get e-mail alerts and updates on your eBay Feed. Unfollow frequency standard to stop getting updates on your eBay Feed.

  • Frequency standard Article about frequency standard by ...

    A post-processed time scale, involving an ensemble of five hydrogen masers, has been developed by a NIST scientist in Boulder to serve as a reference for comparing primary frequency standards.During the last 2 years, this time scale has been used to evaluate the relative frequencies of NIST-7, an optically pumped cesium-beam standard, and NIST-F1, the cesium-fountain frequency standard.

  • (PDF) A CA Optical Frequency Standard - ResearchGate

    The frequency of the Ca standard based on cold Ca atoms has been measured by a frequency chain allowing a phase-coherent comparison against the primary standard of time and frequency, the caesium ...

  • Construction of Frequency Standard by W7CQ

    I use the buffered output of the frequency standard to lock, the time bases for my HP 5328A counter, a HP 5342A counter, a HP 8656B signal generator, a PTS160 LO Signal Generator, a Tek 494AP Spectrum Analyzer, a DSP-10, and lately to lock a 30 mhz

  • realhamradio

    Brooks Shera, W5OJM "A GPS-Based Frequency Standard", QST, July 1998 . Brooks has a web site dedicated to this project. 2. J4 power connector is a three terminal AMP MATE-N-LOCK connector, Mouser Electronics part number is 571-7700181. Two socket pins are also required, p/n 571-7702513. 3 .R. Dean Straw, ed., The ARRL Antenna Book, 18th Ed. ...

  • Standard Deviation Formula For Frequency Distribution ...

    Aug 16, 2018  Standard deviation of a frequency distribution you finding mean variance and sd using the frequency table you variance and standard deviation for grouped data you finding mean variance and sd using frequency table you. Whats people lookup in this blog: Standard Deviation Formula For Frequency Distribution Table;

  • Frequency and time calibration services

    The frequency drift and frequency stability of a frequency standard can also be measured. The uncertainty of the calibration is usually limited only by the quality of the instrument submitted. The basic reference for the measurements is the primary cesium standard, which has an uncertainty as good as 1 x 10 -13 relative to the SI second.

  • Frequency Standard/Reference Kit

    Frequency Standard/Reference Kit - SOLD OUT PDF Instructions [826K] courtesy of Jon, EA2SN Instructions for building the FREQUENCY STANDARD INVENTORY all the parts against the parts list. ___ 220p CAP 1 C5 ___ 1n 1 C4 ___ 100n 3 C1 C2 C3 ___ 6 pin header 1 J3 ___ jumper 1 RED ___ PCB 1 PCB ___ 51 1 R4 ___ 510 1 R1 ___ 1k 1 R3 ___ 4k7 1 R7 ___ 22k 1 R8 ___ 30k pot 1 R5 ___

  • Time and Frequency System - Microsemi

    Time and Frequency System Time and Frequency System Key Features •12 channel GPS receiver with TRAIM •Better than 30 nanoseconds RMS accuracy to UTC •Better than 1x10-12 frequency accuracy •Modularity of many timing options •Standard outputs: 1PPS, selectable pulse rates and alarm •Supports primary and secondary

  • FREQUENCY CALLIBRATION USING HF WWV

    strength at your location and which is the same frequency as your standard (typically 1 or 10MHz) or a harmonic (eg. 10MHz WWV will work for a 1, 2, 5, or 10MHz.) • Tune in WWV in AM mode and note the S meter reading. • Loosely couple the output from your standard to the

  • Rubidium Frequency Standard, Atomic Clock, Cesium ...

    The AR133A-03 is a ruggedized version of Rubidium Frequency Standard model AR133A which is designed for airborne applications. Read More. Buy Now. Nano Atomic Clock (NAC1) 50 .00 39 .00. The NAC1 is the newest addition to AccuBeat’s line of Rubidium Frequency Standards. The Nano Atomic Clock incorporating traditional glass technology

  • Statistics of atomic frequency standards - IEEE Journals ...

    The theory is applied in classifying the types of noise on the signals of frequency standards made available at NBS, Boulder Laboratories, such as: masers (both H and N 15 H 3), the cesium beam frequency standard employed as the U. S. Frequency Standard, and rubidium gas cells. "Flicker noise" frequency modulation was not observed on the ...

  • VE2ZAZ - GPS-Derived 10MHz Frequency Standard

    This GPS-derived frequency standard allows to perceive some differences in behavior of the GPS receivers 1PPS signal. Differences become visible when plotting the measured frequency samples (over 16-second windows, as provided by the system) when the system is in locked state and is stable.