Formulas on the page
Each calculator shows how it computes, formulas in full. Nothing is hidden: you can check a result by hand or redo it in your own spreadsheet.
// CALCULATORS
Flight-test calculators
Three calculators for the sums every instrumentation engineer redoes at each change of configuration: how long a medium records, what a PCM frame costs in bit rate, whether a telemetry link closes. Live results, formulas on the page, a link to share the values. They hold no ETEP figure, so they work for any equipment.
Runs in your browser. Nothing is sent.
The calculators
Recording time and storage
How long a medium records at a given data rate, and how much storage a flight, or a series of flights, needs. Type the rate, or build it from channels, sample rates and bits per sample.
Open the calculatorPCM bit rate and sample rates
From word length, words per minor frame and frame rate to the bit rate, the major frame and the sample rates of normal, supercommutated and subcommutated words, checked against the IRIG 106 Chapter 4 classes.
Open the calculatorTelemetry link budget
Transmitter power, antenna gains, free-space loss and receiver noise, line by line, down to C/N, Eb/N0 and the link margin — with the range at zero margin and the radio horizon.
Open the calculatorHOW THEY WORK
Checkable, by design.
Generic on purpose
No product limit and no catalogue figure: the inputs are yours, and the results hold for any recorder, encoder or transmitter.
Nothing leaves your browser
The arithmetic runs on your computer. The values only go where you send them: into a link, when you copy it to share your sizing.
Units written down
Decimal storage units, bits per second, decibels referred to a milliwatt or to an isotropic antenna: every result carries its unit, and every assumption is stated.
Sizing a real installation?
Send us your parameter list or your link geometry: an engineer works through the numbers with you.
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