Singer Instrumentation NM-17 Измеритель уровня
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NM-17
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Electro magnetic Interference/Field Meter

Информация

PURPOSE AND USE OF EQUIPMENT The Model NM-17.27 is a programmable, precision electromagnetic interference/field intensity (F.MI/FI) meter for the measurement of conducted or radiated RF interference, within the frequency range of 10 kHz to 32 MHz in accordance with standard military and commcrical EMI test specifications. The instrument performs automatic and semiautomatic testing when supplied with appropriate command signals and provides outputs of signal amplitude and frequency that are suitable Tor input to a digital data processing system. Some typical applications of the Model NM-17.27 are: a. Determining the presence, level, frequency, and characteristics of conducted or radiated RF signals within the frequency range of 10 kHz to 32 MHz. b. Automatic and semiautomatic EMI testing in accordance with military specifications, such as; MII.-STD-461 A amd MIL-STD-826A, FCC rules and regulations, and other related specifications. c. Spectrum signature recording when connected to an X-Y plotter. d. Measurement of radiation from a component, system, or vehicle. e. General laboratory applications as a tunable, programmable, two- terminal microvoltmeter. f. RF current measurement in a conductor. g. Antenna propagation studies, radiation pattern and field strength measurements. h. Measurement of the susceptibility of electronic equipment to an electromagnetic environment. i. Analyzing bandpass, band rejection, and discriminating characteristics of electronic components, circuitry, and systems. j. Determination of shielding effectiveness. 1.3 GENERAL DESCRIPTION The instrument is rugged and portable, and operates from internal, rechargeable batteries. It is an ideal unit for use in conjunction with a simple, lightweight computer and recorder, to form a high-speed, high-volume, mobile test station. The instrument may be used to analyze narrowband or broadband signals within its frequency range. Field intensity or direct peak detector functions may be used for measurements in addition to quasi-peak, slideback peak and BFO detection modes. AM, FM and PM signals may be detected and are available at the video output receptacle for Oscilloscope display. When used in conjunction with an Oscilloscope, the Model NM-17.27 becomes an improved spectrum Analyzer with integral pre-selection. Exceptional gain flatness is inherent in the design of the Model NM-17.27. This feature permits X-Y plotting of signal amplitude and frequency information without extreme deviations from the calibration curve. Electronic tuning permits remote and local tuning without mechanical drive. The internal electronic scan may be activated by a front-panel pushbutton. Four IF' band-widths are provided, permitting quick identification of broadband or narrowband signals: a. The SO kHz bandwidth provides greatest sensitivity for broadband signals b. The 10 kHz bandwidth can be used for broadband or narrowband signals. c- The 1 kHz and 100 Hz bandwidths provide greatest sensitivity for narrowband signals and permit improved frequency resolution for closely spaced channels. (A fine-tuning control is provided for ease in tuning CW signals when these bandwidths are used.) The frequency dial indicates operating frequency in all modes of operation: manual tuning, automatic scan, remote scan and AFC. Adjustments to the fine-tuning control are also indicated on the frequency dial. The primary detection circuitry of the Model NM-17.27 uses a logarithmic Amplifier which provides 60 dB of dynamic display range on the panel meter. In conjunction with the five 20 dB RF attenuator steps (total of 100 dB attenuation) the overall measurement range is 160 dB (from 0.01 microvolt to one volt. 1.4 PROGRAMMABLE FUNCTIONS In order to facilitate automated testing methods, the following critical control functions of the Model NM-17.27 are programmable by the application of voltage from a remote source: a. Frequency band selection. b. Bandwidth selection. c. Frequency tuning. d. Receiver gain (calibration). e. Detector function selection. 1.5 SUPPLIED Accessories The items listed in Table 1- 1 are furnished with the Model NM-17.27 EMI/FI meter.

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Обслуживание и Руководство пользователя
Hасто́льная кни́га тип:
Обслуживание и Руководство пользователя
Страницы:
29
Размер:
12.96 Mbytes (13584594 Bytes)
Язык:
english
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A
Hасто́льная кни́га ID:
1-500783-255
Дата:
Качество:
Сканированный документ, читая частично плохо, частично не читается.
Дата загрузки:
2018 12 23
MD5:
2321b5cbe58945cb30720a81e030a52b
Загрузчик:
Bob Max
Загрузки:
1126

Информация

SCOPE OF MANUAL This manual provides operation and maintenance information for the Model NM-17/27 Electro magnetic Interference/Field Intensity (EMI/FI) Meter. The manual is divided into eight sections containing a general description of the equipment and Accessories, specifications, installation information, operating instructions, operating theory, maintenance information, schematic diagrams and a parts list.

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