NST04L Micronetics Wireless, NST04L Datasheet

NST04L

Manufacturer Part Number

NST04L

Description

Broadband Coaxial Microwave Noise Sources

Manufacturer

Micronetics Wireless

Datasheet

1.NST04L.pdf (2 pages)

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

M O D E L

NSL2

NST04*

NST18*

NST26*

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.

M O D E L

NSL2L

NST04L*

NST18L*

NST26L*

* TTL compatible

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

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.

1 MH

AILORED

EDIUM

ROADBAND

ENR B

Z TO

ENR F

1 MHz to 1000 MHz

10 MHz to 4 GHz

10 MHz to 18 GHz **

ROADBAND

100 MHz to 26.5 GHz

Expected Noise Figure

10 MHz to 18 GHz

10 to 20 dB

20 to 35 dB

1 MHz to 1000 MHz

10 MHz to 4 GHz

100 MHz to 26.5 GHz

F R E Q U E N C Y

ROADBAND

FREQUENCY

0 to 10 dB

26.5 GH

RANGE

OUR

OAXIAL

OISE

OAXIAL

ICROWAVE

IGURE

Noise Source Nominal ENR

14 - 16 dB

13 - 17 dB

14 - 16 dB

13 - 17 dB

E N R

ICROWAVE

10 dB

15 dB

R F OUTPUT

5 dB

EASUREMENT

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

E N R d B

30 +/-1

24 (min)

25 (min)

OISE

V S W R

1.4:1 (max)

1.3:1 (max)

1.3:1 (max )

1.6:1 (max)

OISE

OURCES

OISE

PPLICATION

STYLE

C O D E

N, N1

OURCES

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.

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.

The NST series noise sources all feature

an embedded regulated driver which offers

maximum stability of the noise diode RF

circuit.

EMP

PECIFICATIONS

ESCRIPTION

UGGED

PECIFICATIONS

Operating Temp: -55 to +95

Storage Temp: -65 to +125

Supply Voltage: +15 VDC, +28 VDC

Temperature Stability: 0.01 dB/

Ouput Impedance: 50 ohm

Peak Factor: 5:1

ESCRIPTION

UGGED

OLTAGE

TABLE

WEB: WWW.MICRONETICS.COM

TABILITY

ESIGN

Related parts for NST04L

NST04L Summary of contents

Page 1

... Y-factor amplitude and also improves both on and off state VSWR which increases noise figure measurement accuracy RANGE NSL2L 1 MHz to 1000 MHz NST04L* 10 MHz to 4 GHz NST18L* 10 MHz to 18 GHz ** NST26L* 100 MHz to 26.5 GHz * TTL compatible ...

Page 2

B ROADBAND C M OAXIAL ICROWAVE ALIBRATION AND ALIBRATION AND Each noise source is accurately calibrated using a reference noise source traceable ...

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