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  2. Ionosonde - Wikipedia

    en.wikipedia.org/wiki/Ionosonde

    A high frequency (HF) radio transmitter, automatically tunable over a wide range. Typically the frequency coverage is 0.5–23 MHz or 1–40 MHz, though normally sweeps are confined to approximately 1.6–12 MHz. A tracking HF receiver which can automatically track the frequency of the transmitter.

  3. Digital pattern generator - Wikipedia

    en.wikipedia.org/wiki/Digital_pattern_generator

    A digital pattern generator is a piece of electronic test equipment or software used to generate digital electronic stimuli. Digital electronics stimuli are a specific kind of electrical waveform varying between two conventional voltages that correspond to two logic states ("low state" and "high state", "0" and "1").

  4. Pulsed radiofrequency - Wikipedia

    en.wikipedia.org/wiki/Pulsed_radiofrequency

    In this example there are 1000 pulses per second (one kilohertz pulse rate) with a gated pulse width of 42 μs. The pulse packet frequency in this example is 27.125 MHz of RF energy. The duty cycle for a pulsed radio frequency is the percent time the RF packet is on, 4.2% for this example ([0.042 ms × 1000 pulses divided by 1000 ms/s] × 100).

  5. Electric fence - Wikipedia

    en.wikipedia.org/wiki/Electric_fence

    Typically, these fences are 2.4 metres (7 ft 10 in) tall and send high voltage electric pulses through the palisade at a frequency of 1 Hz (one pulse per second). Palisade electric fences are used in most countries, particularly where there is little vegetation to short-circuit the fence or where the costs of security personnel are high in ...

  6. Pulse-repetition frequency - Wikipedia

    en.wikipedia.org/wiki/Pulse-repetition_frequency

    The pulse-repetition frequency (PRF) is the number of pulses of a repeating signal in a specific time unit. The term is used within a number of technical disciplines, notably radar. In radar, a radio signal of a particular carrier frequency is turned on and off; the term "frequency" refers to the carrier, while the PRF refers to the number of ...

  7. Digital delay generator - Wikipedia

    en.wikipedia.org/wiki/Digital_delay_generator

    A digital delay generator (also known as digital-to-time converter) is a piece of electronic test equipment that provides precise delays for triggering, syncing, delaying, and gating events. These generators are used in many experiments, controls, and processes where electronic timing of a single event or multiple events to a standard timing ...

  8. Time-domain reflectometer - Wikipedia

    en.wikipedia.org/wiki/Time-domain_reflectometer

    The shape of the pulse is often a half cycle sinusoid. [2] For longer cables, wider pulse widths are used. Fast rise time steps are also used. Instead of looking for the reflection of a complete pulse, the instrument is concerned with the rising edge, which can be very fast. [3] A 1970s technology TDR used steps with a rise time of 25 ps. [4 ...

  9. Horn analyzer - Wikipedia

    en.wikipedia.org/wiki/Horn_analyzer

    A digital horn analyzer with power ultrasonic parts. A horn analyzer is a test instrument dedicated to determine the resonance and anti-resonance frequencies of ultrasonic parts such as transducers, converters, horns/sonotrodes and acoustic stacks, which are used for ultrasonic welding, cutting, cleaning, medical and industrial applications.

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