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400-168-0010
This standard pertains to pulse transformers for use in electronic equipment. For the various types of these transformers, the peak power transmitted ranges from a few milliwatts to kilowatts; and the peak voltage transmitted ranges from a few volts to many kilovolts. These transformers are required to transmit uni polar or bipolar pulses of voltage or current within specified tolerances of amplitude and time when operated between specified impedance. They are typically used as coupling devices in electronic circuits. In blocking oscillators, they are connected to provide positive feedback in the circuit. In radar or similar use, they are used to couple the modulator to a magnetron, a klystron, a traveling-wave tube or a cross-Þeld amplifier load. Whenever numerical values are indicated in this standard, they may be considered as recommended values. Section 6. describes the preferred transformer test methods and Appendix A contains alternate test methods
This standard pertains t o small low-power pulse transformers for use in electronic equipment, transmitting peak power of 300 W or less and average power of 5W or less with a peak working voltage of 1000 V or less. These transformers are required to transform unipolar or bipolar pulses of voltage or current within specified tolerances of amplitude and time when operated between specified impedance. This standard is not intended to include low-power switching type pulse transformers which are… read more covered in IEEE Std 272-1970, Standard for Computer-Type (Square-Loop) Pulse Transformers. These transformers depend upon the use of square - loop core material for operation, have memory capability, and normally transmit only bipolar pulses unless provision is made for core flux reset. This standard is not intended to include transformers for power conversion applications. T h o s e transformers will be covered in a related standard. Whenever numerical values are indicated they may be considered as recommended values. Section 2 contains definitions of terms pertaining primarily to functional testing of low-power pulse transformers, and Section 5 contains equivalent circuits a n d definitions of associated terms. Section 6 describes preferred transformer test methods and the appendix contains alternate test methods. read less
This guide defines and classifies industrial ultrashort pulse lasers and specifies the required parameters that should be included in industrial ultrashort pulse laser products, such as maximum average output power, pulse width, power stability, effective spot diameter, divergence angle, spot roundness, beam quality, signal-to-noise ratio, polarization direction, extinction ratio, pulse power stability, pulse rise/fall edge, pulse rise/fall time, position synchronized output, and environmental… read more reliability. This guide also provides testing methods for the necessary parameters of industrial ultrashort pulse lasers. read less
The scope of this standard is two-fold. First, to establish and define requirements for methods which can be used to measure the performance of dial-pulse address signaling systems used with voice frequency telecommunications equipment. Second, to establish functional requirements for test equipment needed to make the measurements. Such standard conditions as will be possible with these methods and means are mandatory if consistent and repeatable test results are to be obtained. This standard… read more will be limited to the parameters of dial-pulse signaling systems used in the North-American network that affect addressing performance. These parameters shall be measured at appropriate access points within the telecommunications switching system, on associated local subscriber loops, on trunks interconnecting switching systems, or on station apparatus. Measurements of supervisory signals or of the time relationship between supervisory and dial-pulse address signals, are not included. Signaling systems other than dial pulse (for example, single frequency in-band or out of band) which results in a dial-pulse address may require testing using methods and equipment covered by this standard. read less
The purpose of this standard is to provide test equipment requirements and methods for testing the transmission characteristics of PCM telecommunications equipment, circuits, and systems. The test equipment requirements are intended to be suitable for certification, installation, pre-service, and out-of-service operational and in-service operational tests of the PCM transmission facilities. The PCM equipment that may be tested includes primary multiplex equipment containing A-D (Analog-Digital)… read more conversion devices, digital multiplex equipment, digital links, and digital sections. This document is currently limited to testing at the analog interfaces of the primary multiplex equipment and the digital interfaces at DS1, DS1C, DS2, and DS3 levels of the North American digital hierarchy. Synchronous multiplex equipment and equipment offering other than 64 kb/s coded voiceband channels (e.g., 32 kb/s voiceband coding, 256 kb/s program, or 64 kb/s data) are not covered in this standard. Signaling parameter measurement is outside the scope of this document. read less
Within the context of the ISO/IEEE 11073 family of standards for device communication, this standard establishes a normative definition of communication between personal telehealth pulse oximeter devices and compute engines (e.g., cell phones, personal computers, personal health appliances, set top boxes) in a manner that enables plug-and-play (PnP) interoperability. It leverages appropriate portions of existing standards including ISO/IEEE 11073 terminology, information models, application… read more profile standards, and transport standards. It specifies the use of specific term codes, formats, and behaviors in telehealth environments restricting optionality in base frameworks in favor of interoperability. This standard defines a common core of communication functionality for personal telehealth pulse oximeters. read less
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