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Category: Time and Frequency

Allan Deviation — the Time-Nuts’ Statistic

February 4, 2022 n8ur Leave a comment

The essence of time-nuttery is measuring the stability of clocks and oscillators.  Allan Deviation (“ADEV”) is the statistic most commonly…

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Posted in: GPS, Test and Lab Equipment, Time and Frequency Filed under: ADEV, Frequency, PTTI, Time, time-nuts

PowerPole Color Conventions

October 5, 2019 n8ur Leave a comment

A lot of us use Anderson PowerPole connectors for DC power distribution. There’s a nearly universal standard to use red…

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Posted in: General, Ham Radio, SDR, Test and Lab Equipment, Time and Frequency Filed under: Cabling, DC Power, PowerPole, Wiring

GPS Frequency Stability

April 8, 2019 n8ur Leave a comment

I couldn’t find a nice graph showing the timing performance of a single-frequency, sawtooth-corrected, pulse-per-second output from a GPS. So…

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Posted in: GPS, Test and Lab Equipment, Time and Frequency

Oscillator Aging Trends

March 25, 2019 n8ur Leave a comment

It’s well known that just about all oscillators drift, or “age”, in frequency with time. In crystal oscillators, the most…

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Posted in: Test and Lab Equipment, Time and Frequency Filed under: ADEV, BVA, Oscilloquartz

HP 5065A Status

February 27, 2019 n8ur Leave a comment

My faithful HP 5065A Rubidium standard, which had been converted to a “Super” model, developed an intermittent sickness and back…

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Posted in: Test and Lab Equipment, Time and Frequency Filed under: Frequency Standards, HP5065A

HP 5061B-004 Cesium Standard

November 11, 2018 n8ur Leave a comment

I was lucky enough to find an HP 5061B cesium standard with what I think is a virtually new high…

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Posted in: Test and Lab Equipment, Time and Frequency

HP 5065A Rb Standard

November 10, 2018 n8ur Leave a comment

I set my HP 5065A Rubidium standard to the 5071A. Unlike a Cesium clock, the Rubidium system does have some…

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Posted in: Test and Lab Equipment, Time and Frequency

HP 5061A Frequency Offset

November 8, 2018 n8ur Leave a comment

I compared my old HP 5061A cesium standard against a much newer HP 5071A with high performance tube. Cesium standards…

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Posted in: Test and Lab Equipment, Time and Frequency

OSA 8607-008 baseline frequency measurement

n8ur Leave a comment

This is the first of several boring posts where I’m documenting the offset of a couple of my frequency standards…

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Posted in: Test and Lab Equipment, Time and Frequency

More Solar Eclipse Analysis (HF Propagation)

August 30, 2017 n8ur Leave a comment

I’ve continued processing the data generated from software-defined-radio recordings I made during the 2017 solar eclipse at my fairly isolated…

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Posted in: Ham Radio, SDR, Solar Eclipse, Test and Lab Equipment, Time and Frequency Filed under: Beaver Island, eclipse, SDR

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