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DESCRIPTION
The Noise Measurement System product line is a modular instrument that may be customized to implement a
versatile dual-channel noise measurement system. The measurement system may be used to make both AM
and PM noise measurements on signals in the frequency range of 1 MHz to 45 GHz. Custom detector
modules may be added to extend the carrier frequency measurement range. The measurement system is
composed of modules that plug into the measurement system mainframe. The mainframe dimensions are 5U
X 19” X 16”. The mainframe is included with the purchase of a Noise Measurement System Controller
(NMSC).
There are two standard measurement system controllers. The NMSC-1 has a spectral analysis capability from
DC to 1 MHz. The NMSC-2 extends the spectral analysis frequency range to 10 MHz and can be upgraded to
provide spectral analysis from DC to 40 MHz. The NMSC modules contain dual-channel spectrum analysis
allowing the measurement of signals that are buried in the system noise floor. The front panel has a 6.4 inch,
color touch-screen display. An external keyboard, monitor and printer can also be connected to the controller.
Remote measurements or monitoring are possible using an ethernet connection.
There are six slots available on the noise measurement crate for the various measurement modules. Two
standard noise detector modules are currently offered that cover the frequency range of 2 MHz to 18 GHz.
The ND-1 covers the frequency range of 2 MHz to 1 GHz. The ND-3 module covers the frequency range of 1
GHz to 18 GHz. Custom modules may be ordered to extend the frequency range or implement special
measurement topologies. All the noise detector modules are designed to facilitate the measurement of
sources as well as passive and active components. A phase locked loop with programmable parameters is
included with the noise detectors to facilitate the measurement of noise in signal sources. The PLL
parameters can be adjusted so that a wide range of sources can be measured. Noise in amplifiers, multipliers,
mixers and other active and passive components can be measured easily with the addition of one of the
programmable delay line modules.
Calibration of the Noise Measurement System can be accomplished easily using a noise source module, NS-
NM or a tone calibration module, TC-NM. The system can also be calibrated by using the traditional beat-note
calibration method. Calibrated noise source modules and tone calibration modules can be ordered for any
frequency range of interest.
SPECIFICATIONS
Power supply: 110 VAC, 3A, 60 Hz
220 VAC, 2A, 50 Hz
Operating temperature: 10 to 40 degrees C
Dimensions: 5U X 19” X 16”
Empty weight: 25 lb
Full weight: 50 lb
SDI
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