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www.micronetics.com/Noise_Source_SMT/Surface_Mount_Microwave.pdf
SMN7114 SURFACE MOUNT AMPLIFIED NOISE SOURCE
100 MHZ TO 3.0 GHZ
DESCRIPTION
The SMN7114 noise module is designed for a wide range of circuit boards. It features high ENR output for uses from built-in-test to jamming. All biasing cir cuitry is built-in making it easy to design into your system. It features a built-in voltage regulator for highly stable output even if your DC supply lines are not.
7114-C2A
SUITABLE FOR HIGH V OLUME PRODUCTS :
SMN7114 TYPICAL DATA
The SMN7114 noise source being sur face mount, having a small footprint and available on tape and reel make them ideal for production manufacturing. Traditionally packaged microwave noise sources have been large and costly ren dering them unsuitable for all but large expensive systems. The benefits of having built-in test and calibration can now be brought to mass produced prod ucts so they too can realize the benefits of an onboard noise source.
SPECIFICATIONS
* Frequency: * ENR: * Flatness: * Impedance: * VSWR: * Bias: 100 MHz to 3.0 GHz 45 dB min 2.5 dB max 50 ohms On-state 1.5:1 (max) Off-state 1.8:1 (max) +8 to +18 Vdc @ 90 mA max
APPLICATION NOTE
Using noise for built-in test: There are two primary uses for employing a noise signal for built-in test. 1. Noise Temperature (noise figure) or sensitivity testing: This test uses the noise source to supply a known excess noise ratio (ENR) to a device under test for a Y-factor measurement. By taking two receiver readings, one with the noise on and one with it off, Y-factor can be determined. By knowing the ENR and Y-factor, one can calculate noise temperature (figure) or sensitivity. 2. Frequency Response: The noise source being broadband can be used as a replacement of a swept source to calculate frequency response of a receiver or other device. By putting in a known spectral signal at the input and taking a reading at the output, one can determine the gain or loss over frequency of the entire system. Noise sources are inherently extremely stable devices. In addition, the circuitry is much simpler than a swept source which increases reliability and lowers cost. For more information on using noise for built-in-test, read the Feb 2004 Microwave Journal article authored by Patrick Robbins of Micronetics. http://www.micronetics.com/articles/microwave_journal_02-04.pdf http://www.micronetics.com/articles/microwave_journal_02-04.pdf
* Operating Temp: -40 to +85 oC * Storage Temp: * ENR vs Temp: * Shutdown Input: -54 to +125 oC 0.04 dB / deg C ( T T L Compatible)
Logic "0" = Noise Off Logic "1" (open) = Noise On
MICRONETICS, HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 / NOISESALES@MICRONETICS.COM
WWW.MICRONETICS.COM
SMN7114 SURFACE MOUNT AMPLIFIED NOISE SOURCE
USEFUL NOISE EQUATIONS
www.micronetics.com/Noise_Source_SMT/Surface_Mount_Microwave.pdf
100 MHZ - 3.0 GHZ
Calculating Y-Factor: YFact = N2 / N1 Where N 2 is measured power output with noise source on and N 1 is the measured power output with noise source off. Calculating noise figure from ENR and Y-Factor: NF(dB) = ENR (dB) - 10 log10 (YFact -1) Converting ENR to noise spectral density (N0): 0 dB ENR = -174 dBm/Hz Calculating noise power in a given bandwidth (BW) from noise spectral density: Power (dBm) = N 0 + 10log(BW)
HOW TO ORDER
Model #
S M N 7 1 1 4- C 2 A
Indicate Bulk or Tape and Reel when ordering
PACKAGE OUTLINE DRAWING
MICRONETICS, HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 / NOISESALES@MICRONETICS.COM
WWW.MICRONETICS.COM

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