NS 346 C
ALIBRATED
N
OISE
S
OURCE
S
ERIES
F
OR
N
OISE
F
IGURE
M
EASUREMENT
10 MH
ZTO
40.0 GH
Z DD
ESCRIPTIONESCRIPTION The NS 346 series noise sources arespecifically crafted to be used with noise
figure meters. They are factory calibrat-
ed to a high degree of absolute accura-
cy. These noise sources also haveextremely good match in both on and offstates which increases the accuracy of
noise figure measurement.
RR
UGGEDUGGED
/S/S
TABLETABLE
DD
ESIGNESIGN
::
B
ROADBAND C
ALIBRATED O
UTPUT C
HARACTERISTICS The heart of the NS 346 noise sourcesis a small chip and wire hermetic mod-
ule. This is embedded in the housing
with a precision launch to the
in line connector. This design gives is much
more stable and rugged than traditional
coaxial noise sources which rely on pill
packaged diodes and beryllium copper
bellow assemblies which not only are
less reliable, but use hazardous materi-
als. Secondly the noise source bias is
driven by a built-in regulated driver
which provides extremely stable output
regardless of how stable the supply
from the noise figure meter or external
power supply manufacturer is. Lastly, the NS 346
series noise sources are manufactured
only with the highest quality coaxial con-
nectors for a sound connection every
time ensuring low VSWR. 00:1000:1
F
OR U
SE W
ITH N
OISE F
IGURE M
ETERS MODEL FREQUENCY OUTPUT VSWRVSWR VSWR VSWRGHZ ENR 0.01-5GHz 5-18GHz 18-26.5GHz 26.5-40.0GHz
NS346A0.01-18.0 5-7 dB1.15:11.25:1NS346B0.01-18.0 14-16 dB 1.15:11.25:1NS346C0.01-26.5 13-17 dB 1.15:1 1.25:1 1.50:1NS346D0.01-18.0 19-25 dB 1.50:11.50:1NS346E 0.01-26.5 19-25 dB 1.50:1 1.50:1 1.50:1NS346AK 0.01-26.5 5-8 dB 1.15:11.25:1 1.30:1NS346Ka 0.10-40.0 10-17 dB 1.25:1 1.30:1 1:40.1 1.50:1
GG
OLDOLD
SS
TANDARDTANDARD
CC
ALIBRATIONALIBRATIONANDAND
QQ
UALITYUALITY
AA
SSURANCESSURANCE
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Accuracy: Each noise source is accurately calibrated at Micronetics' state of the artmetrology lab using a reference noise that has been direct-
ly calibrated by the National Physical Laboratory in
England (NPL)*. This reference noise source is known as
a gold standard. Other noise source calibration labs typi-
cally use as a reference a noise source that is once (or
twice) times removed from a gold standard which is known
as a silver or transfer standard. Special calibration data can also be supplied upon request (consult factory). Calibration Data: Calibration data consists of Excess Noise Ratio (ENR) at cardi-nal frequency points across the spectrum of the device according to Table 1. The
calibration data and date are printed on a label on the noise source itself. A printout
of the calibration data and uncertainty report are also supplied with each unit along
with a certificate of calibration. Upon request, the data table is also supplied in text
file format on CD-ROM or floppy disk.
SS
PECIFICATIONSPECIFICATIONS Operating Temp: -55 to +95
o CStorage Temp: -65 to +125
o CSupply Voltage: +28 VDC *
Temperature Stability: 0.01 dB/
o COuput Impedance: 50 ohm
Peak Factor: 5:1 * +15 VDC available upon request Standard choices consist of:• More calibration points across the spectrum
• Special discrete calibration frequencies
Free
Annual Calibration: Micronetics’ NS 346 series noise sources have a cali-bration period of 1 year. Enclosed in the SCD box that holds the noise source is acalibration voucher good for one free calibration. Micronetics will recalibrate the
noise source with the same procedure as the initial calibration
* National Institute of Standards and Technology or NIST has a reciprocal agreement with NPL as a certified calibrated standard laboratory for noise source calibration. /26 HAMPSHIRE DRIVE/ HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 WEB: WWW.MICRONETICS.COM