Return to Noise Index
http://www.micronetics.com/Noise_Source/Coaxial_Waveguide.pdf
F
ULLBAND
C
ALIBRATED
M
ICROWAVE
N
OISE
S
OURCES
L, S, C, X, K
U
, K, K
A
B
ANDS
1 GH
Z TO
40 GH
Z
D
ESCRIPTION
Micronetics' line of full band noise
sources are specially designed for easy
integration into microwave systems.
They feature rugged construction with
excellent long-term stability.
Configurable to your requirements:
Micronetics full band noise sources are
based on a coaxial design as the base
part. As standard options, noise
sources can be ordered with either
• Coaxial Isolator
• Waveguide Output
• Waveguide Isolator
Each noise source is calibrated to the
output port so no external deembedding
of calibration data is necessary. In addi-
tion to the RF output choices, there are
also different packages available to
meet a wide range of mechanical con-
straints.
BANDS:
• L
• S
• C
• X
• Ku
• K
• Ka
F
ULLBAND
O
UTPUT
C
HARACTERISTICS
F
OR
U
SE IN
S
YSTEMS
MODEL
RFN25L
RFN25S
RFN25C
RFN25C1
RFN25C2
RFN25X
*
RFN25Ku
RFN25K
NS2640
FREQUENCY
RF OUTPUT
EXCESS NOISE
RATIO (dB)
STYLE
CODES
1.0 to 2.0 GHz
30(MIN)
N,N1 Q, X, W, Y
2.0 to 4.0 GHz
30(MIN)
N,N1 Q, X, W, Y
4.0 to 8.0 GHz
30(MIN)
N,N1 Q, X, W, Y
3.95 to 5.85 GHz
(waveguide only)
25(MIN)
N,N1 X, Y
5.85 to 8.20 GHz
(waveguide only)
25(MIN)
N,N1 X, Y
8.0 to 12.4 GHz
25(MIN)
N,N1 Q, X, W, Y
12.4 to 18.0 GHz
25(MIN)
N,N1 Q, X, W, Y
18.0 to 26.5 GHz
25(MIN)
Y
26.5 to 40 GHz
14 to 20 dB
See Chart
*
wavegide frequency is 8.2 to 12.4 GHz
S
PECIFICATIONS
s
Operating Temp: -55 to +95o C
s
Storage Temp:
-65 to +125 oC
s
Supply Voltage: +15 , +28 VDC
s
Temp Stability:
0.01 dB/ oC
s
Ouput Impedance: 50 ohm
s
Peak Factor:
5:1
R
UGGED
/S
TABLE
D
ESIGN
:
The heart of these noise sources 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 gives is much more stable and rugged than traditional coaxial noise sources
which rely on pill packaged diodes and beryllium copper bellow assemblies which are
not only are less reliable, but use hazardous materials.
W
AVEGUIDE
C
H A R T
Model
Frequency
RFN25C1 3.95 to 5.85 GHz
RFN25C2 5.85 to 8.20 GHz
RFN25X
8.20 to 12.4 GHz
RFN25Ku 12.4 to 18.0 GHz
RFN25K
18.0 to 26.5 GHz
NS2640
26.5 to 40.0 GHz
Waveguide
WR-187
WR-137
WR-90
WR-62
WR-42
WR-28
C
ALIBRATION
AND
Q
U A L I T Y
A
SSURANCE
:
Each noise source is accurately calibrated using a reference noise source traceable
to NIST/NPL Calibration data consists of 5 calibration points across the full-band.
Data is supplied as a print out. Special calibration data can also be supplied upon
request (consult factory). Standard choices are:
• More calibration points across the spectrum
• Special discrete calibration frequencies
• Data supplied in soft format as screen capture or text file on floppy
or CD-ROM.
In addition to the calibration data, a certificate of calibration and a certificate of con-
formance is supplied with each unit.
MICRONETICS / 26 HAMPSHIRE DRIVE / HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987
WEB: WWW.MICRONETICS.COM
http://www.micronetics.com/Noise_Source/Coaxial_Waveguide.pdf
F
ULL
B
AND
M
ICROWAVE
N
OISE
S
OURCES
L, S, C, X, K
U
, K, K
A
B
ANDS
U
SING
N
OISE
FOR
B
UILT
-
I N
-T
EST
H
OW
TO
O
RDER
There are three 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.
3. Amplitude Reference Source:
The noise source can be
used as a known reference signal. By switching in the noise source from
the live signal, a quick test can be performed to check the health of the
chain or calibrate the gain/loss. For this test, noise can be injected into
the IF system as well as the RF to test/calibrate the path.
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
RFN25X-XXX
Model
L = L band *
S = S band *
C = C band
C1 = C band
C2 = C band
X = X band
Ku = Ku band
K = K band
Ka = Ka band
Package
N = N package
Q = Q package
X = X package
Y = Y package
Option
0 = Plain
1 = Coax Isolator
2 = Waveguide
3 = Waveguide Isolator
Bias Voltage
A = +28V
B = +15V
* waveguide not
available on S
and L models
NS2640-XXX
U
SEFUL
N
OISE
E
QUATIONS
Calculating Y-Factor:
Y
Fact
= N
2
/ N
1
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 (Y
Fact
-1)
Converting ENR to Noise spectral density (N
0
):
0 dB ENR = -174 dBm/Hz
Calculating noise power in a given bandwidth (BW) from noise
spectral density:
Power (dBm) = N
0
+ 10log(BW)
Package
A = Lug package
B = BNC package
Option
1= Coax Isolator, 2.92 mm (f)
2= Coax Isolator, 2.92 mm (m)
3= Waveguide
4= Waveguide Isolator
5= Plain, 2.92 mm (f)
6= Plain, 2.92 mm (m)
Bias Voltage
A = +28V
B = +15V
NS2640 26.5
TO
40 GH
Z
P
AKAGING
O
PTIONS
Outline Dwg
NS2640-A1A-70
NS2640-A2A-70
NS2640-A3A-70
NS2640-A4A-70
NS2640-A5A-70
NS2640-A6A-70
NS2640-B1A-70
NS2640-B2A-70
NS2640-B3A-70
NS2640-B4A-70
NS2640-B5A-70
NS2640-B6A-70
NS2640-A1B-70
NS2640-A2B-70
NS2640-A3B-70
NS2640-A4B-70
NS2640-A5B-70
NS2640-A6B-70
NS2640-B1B-70
NS2640-B2B-70
NS2640-B3B-70
NS2640-B4B-70
NS2640-B5B-70
NS2640-B6B-70
Bias Connector
Lug
Lug
Lug
Lug
Lug
Lug
BNC (F)
BNC (F)
BNC (F)
BNC (F)
BNC (F)
BNC (F)
Lug
Lug
Lug
Lug
Lug
Lug
BNC (F)
BNC (F)
BNC (F)
BNC (F)
BNC (F)
BNC (F)
Bias Voltage
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+28 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
+15 Vdc
http://www.micronetics.com/Noise_Source/Coaxial_Waveguide.pdf
RF Output Type
Coax Isolator, 2.92mm (F) Connector
Coax Isolator, 2.92mm (M) Connector
Waveguide
Waveguide Isolator
Plain, 2.92 mm (M) Connector
Plain, 2.92 mm (F) Connector
Coax Isolator, 2.92mm (F) Connector
Coax Isolator, 2.92mm (M) Connector
Waveguide
Waveguide Isolator
Plain, 2.92 mm (M) Connector
Plain, 2.92 mm (F) Connector
Coax Isolator, 2.92mm (F) Connector
Coax Isolator, 2.92mm (M) Connector
Waveguide
Waveguide Isolator
Plain, 2.92 mm (M) Connector
Plain, 2.92 mm (F) Connector
Coax Isolator, 2.92mm (F) Connector
Coax Isolator, 2.92mm (M) Connector
Waveguide
Waveguide Isolator
Plain, 2.92 mm (M) Connector
Plain, 2.92 mm (F) Connector
Please consult factory for models without active links to drawings. Tel: 603-883-2900 x346 or email
noisesales@micronetics.com
