SMN7109
1/2 I
NCH
S
URFACE
M
OUNT
A
MPLIFIED
N
OISE
S
OURCE
5 MH
Z TO
500 MH
Z
D
ESCRIPTION
The SMN7109 noise module is designed
for a wide range of applications. It fea-
tures high noise output amplitude for
uses ranging from encryption to jam-
ming. All biasing and amplification circuit-
ry 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.
SMN7109-D1C
SMN7109 T
YPICAL
D
ATA
S
UITABLE FOR
H
IGH
V
OLUME
P
RODUCTS
:
The SMN7109 noise sources being sur-
face mount, having a small footprint and
available on tape and reel, make them
ideal for production manufacturing.
Traditionally packaged noise sources
have been large and costly rendering
them less suitable for all but the more
expensive, exotic systems. Noise can
now be thought of as lower cost, more
reliable, smaller and an easier to imple-
ment alternative to costly microprocessor
based solutions such as PN generators,
arbitrary waveform generators and DSP
processors.
S
PECIFICATIONS
• Frequency:
5 MHz to 500 MHz
A
PPLICATION
N
OTE
Common Noise Applications
1.
Built-in IF Testing:
Highly stable flat over frequency noise sources serve to provide built-in test for an IF
subsystem. By injecting a stable signal reference through the IF chain, one can cali-
brate the gain/loss and frequency response. In addition, the noise source can be used
to set up Eb/No for built-in stimulated BER testing of digital demodulation.
2.
Barrage Jamming:
The noise signal is fed into the tuning port of a VCO. The result-
ing sinusoidal signal hops randomly around the desired frequency band to be jammed.
Signal processing circuitry can be employed between the noise source and tuning port
to shape the noise probability function (PDF) for the designed jamming effect.
3..Random number Generation for Encryption:
Noise sources being truly random (not
pseudorandom) give the ultimate in secure communication because of their ability to
generate a truly random number pattern. This can be used to seed an encryption key
for authentication. The noise signal can be fed directly into an A/D converter for sam-
pling or a simpler techniques might use a comparator. Further shaping of the noise is
often employed whether either analog if in front of the A/D converter or afterwards using
DSP.
MICRONETICS, HUDSON, NH 03051 / TEL: 603-883-2900 / FAX: 603-882-8987 / NOISESALES@MICRONETICS.COM
• Noise Power Spectral Density (No):
-101 dBm/Hz (min)
• Noise Power (N): -16 dBm
• Spectral Flatness: 4 dB (total window)
• Bias:
• Peak Factor:
12 Vdc
Internally Regulated
5:1
• Operating Temp: -55 to +85 C
• Storage Temp:
-55 to 125 C
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MICRONETICS [ MICRONETICS, INC. ]
