SDI FS100-RM Manual de usuario descargar pdf (Pagina 59)

NOISE SOURCE, NS-3

SDI

APPLICATIONS

 AM/PM noise measurements

 Characterization of components

FEATURES

 Stable Gaussian noise generator

 Noise bandwidth up to 10%

 Noise flatness < 1 dB

 Low insertion loss

DESCRIPTION

Model NS-3 is a gaussian noise source module that plugs into the NMS mainframe may be used to calibrate

the AM and PM noise measurement system. The gaussian noise source is typically bandwidth limited to 10%

of the carrier frequency of interest and is summed with the RF carrier when calibrating the measurement

system. The standard unit comes with three noise filter settings: 5 MHz, 10 MHZ and 100 MHz. Other

frequencies are available upon request.

The noise source can be turned on or off manually or under control of the Noise Measurement System

Controller. Once calibration is complete, the noise source may be turned off and the AM or PM noise

measurement can be completed without disconnecting any of the signals. The noise source calibration

certificate may be obtained from SDI or from NIST.

SPECIFICATIONS

PARAMETER CONDITIONS MIN TYP MAX UNITS

RF input range Carrier level

-20 to + 20 dBm

2-1000 MHz

RF input level range -

-25 to +25 dBm

RF insertion loss -

0.5 1.0 dB

Noise flatness

Carrier +/- 10%

Carrier +/- 1%

<0.5

<0.2

1.0

0.5

Filter calibration uncertainty 10 KHz offset

100 KHz offset

1 MHz offset

+/- 0.25

Noise level relative to a

0 dBm carrier

-104 - dBc/Hz

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SDI FS100-RM Manual de usuario Pagina 59

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