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NSL2

更新时间： 2024-11-28 06:00:47

品牌	Logo	应用领域
MICRONETICS		微波
页数	文件大小	规格书
2页	412K
描述
BROADBAND COAXIAL MICROWAVE NOISE SOURCES

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Return to Noise Index

ROADBAND OAXIAL

http://www.mwireless.com/Noise_Source/Microwave_Broadband.pdf

ICROWAVE

NOISE

SOURCES

1 MHZ TO 26.5 GH

ESCRIPTION

Micronetics' line of broadband coaxial noise

sources are specially designed for easy

integration into microwave systems. They

are designed to be rugged with excellent

long-term stability.

^UGGED/S^TABLE

ESIGN

The heart of Micronetics microwave noise

source is a small chip and wire hermetic

noise module. This is embedded in the

housing with a precision launch to the

coaxial jack. This design is much more

stable and rugged than traditional coaxial

noise sources which rely on pill packaged

diodes and beryllium copper bellow assem-

blies which not only are less reliable, but

use hazardous materials.

MEDIUM ENR BROADBAND COAXIAL MICROWAVE NOISE SOURCES

MODEL

FREQUENCY

RANGE

RF OUTPUT

ENR dB

STYLE

CODE

NSL2

1 MHz to 1000 MHz

10 MHz to 4 GHz

10 MHz to 18 GHz

100 MHz to 26.5 GHz

30 +/-1

25 (min)

24 (min)

N, N1

NST04*

NST18*

NST26*

LOW ENR BROADBAND COAXIAL MICROWAVE NOISE SOURCES

^EMP/V^OLTAGE

TABILITY

Micronetics low ENR noise sources feature a large value embedded attenuator

ideal for Y-factor tests. The attenuator serves dual purposes of lowering the ENR to

a suitable Y-factor amplitude and also improves both on and off state VSWR which

increases noise figure measurement accuracy.

The NST series noise sources all feature

an embedded regulated driver which offers

maximum stability of the noise diode RF

circuit.

MODEL

FREQUENCY

RANGE

ENR

VSWR

STYLE

CODE

PECIFICATIONS

NSL2L

1 MHz to 1000 MHz

10 MHz to 4 GHz

10 MHz to 18 GHz **

100 MHz to 26.5 GHz

14 - 16 dB

13 - 17 dB

1.3:1 (max)

1.3:1 (max )

1.4:1 (max)

1.6:1 (max)

N, N1

■

Operating Temp: -55 to +95 C

Storage Temp: -65 to +125 C

NST04L*

NST18L*

NST26L*

Supply Voltage: +15 VDC, +28 VDC

Temperature Stability: 0.01 dB/ C

Ouput Impedance: 50 ohm

Peak Factor: 5:1

* TTL compatible

** 2 GHz to 18 GHz ENR range is 14-16 dB

TAILORED ENR FOR YOUR NOISE FIGURE MEASUREMENT APPLICATION

Micronetics offers other ENR values upon request. The optimum ENR of the noise source is dependant on the expected noise

figure of the DUT. If the expected noise figure is high, the measured difference of the off and on noise source states will be too

hard to discern accurately with the DUT's comparatively large amount of self generated thermal noise. However if the expected

noise figure is very low than using a noise source with too high a level of ENR will cause the two measured values to have such

disparate amplitudes that non-linear dynamic range issues may compromise accuracy. Depending on how crucial the measure-

ment uncertainty window needs to be, the designer can mathematically calculate the theoretical best ENR. This process can be

exhaustive mathematically. Table 1 indicates a quick rule of thumb for ENR vs. expected noise figure. It should be noted that

any path loss between the noise source and DUT must be accounted for. If a 10 dB noise source makes sense for the DUT but

there is a 10 dB coupler and 3 dB of insertion loss, than a noise source with a 20 - 25 dB ENR is needed.

Expected Noise Figure Noise Source Nominal ENR

0 to 10 dB

10 to 20 dB

20 to 35 dB

5 dB

10 dB

15 dB

MICRONETICS / 26 HAMPSHIRE DRIVE / HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987

WEB: WWW.MICRONETICS.COM

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