Com-Power CGO-5100B User Manual
Features
Reference Signal Source for EMI Test Sites
100 MHz Frequency Steps
Usable Frequency Range up to 18 GHz
Battery Powered
Three Year Warranty
Comb Generators
CGO-5100B
Description
The CGO-5100B Comb Generator is a radiated
reference signal source with a 100 MHz frequency
step size. Unlike a signal generator the Comb
Generator radiates all the harmonics at the same
time without any need of tuning. The CGO-5100B has
a frequency stability of 5 PPM and radiate signals
up to 18 GHz.
This Comb Generators have a built in antenna which
is located on top of the circular chassis. The chassis
shape helps the Comb Generator radiate the signal
more uniformly in all directions in the horizontal
plane. It can be turned on its side for vertical plane
measurements, but is generally not recommended
because the inuence of the ground plane on the
radiation pattern.
The CGO-5100B is powered by rechargeable internal
NimH batteries. Using a battery eliminates the need
for external cabling that may interfere with the
radiated signals. When fully charged, the battery
allows continuous use of the Comb Generator for
up to 18 hours. The Comb Generator and the charger
are shipped with a custom wooden storage box.
Application
Most EMC regulatory agencies require EMI labs to
perform regular calibration of test equipment and
test sites used for EMI emission measurements.
Most EMC labs calibrate their sites and test
equipment annually to ensure this requirement is
met. However, it is prudent to check the sites and
test equipment more frequently to ensure the data
taken on the site is accurate and consistent. The
normal calibration methods are not practical for a
quick check. The solution is to use a Comb Generator
as reference signal source.
The test engineer can keep a regular log of Comb
Generators radiated readings. This data can be used
to detect potential problems with site or equipment
by monitoring any signicant changes. Using this
method, potentially costly measurements error can
be avoided. Without regular monitoring a broken
antenna, a bad cable, blown preamplier and poor
RF connections may go undetected. The Comb
Generator can be also used compare several sites to
determine the impact of the site on the test data.
Other applications for the comb Generator include
testing shielding eectiveness of an enclosure and
materials.
Rev. D04.14
Com-Power Corporation 19121 El Toro Road, Silverado, California 92676 (949) 459 - 9600 www.com-power.com
Specications
0
10
20
30
40
50
60
70
80
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Field Stength (dBuV/m)
Frequency (GHz)
CGO-5100B Comb Generator Radiated Output Levels vs Typical Measurement System Noise Levels
Measurements performed at 3 meter distance, antenna height varied from 1 to 4 meters
Video Average Reading - 1
MHz RBW / 10 Hz VBW
Video Average Reading - 100
kHz RBW / 10 Hz VBW
Video Average Reading - 3
kHz RBW / 10 Hz VBW
Video Average Reading - 1 kHz
RBW / 10 Hz VBW
FCC Part 15 - Average
Limit
FCC Part 15 - Peak Limit
Measurement Systems
Floor noise levels &
FCC Part 15 limits
Product Name Comb Generator
Frequency Range 1 to 18 GHz
Intended Application Reference EMC Site Measurements
Frequency Step Size 100 MHz
Frequency Stability 5 ppm
Time Stability <1 dB over 12 months
Charger Input 6 VDC, 500A
Operating time >18 Hours when fully charged
Battery Type 3.6 V, NimH
External Indicators Battery Low Power On
Antenna Built in
Circular base dimensions 8 x 1 inches / 19.2 x 2.4 cm
Weight 1 lbs / 0.5 kg
Comb Generators
CGO-5100B
Typical Output
All specications are subject to change without notice.
All values are typical, unless specied.
Com-Power Corporation 19121 El Toro Road, Silverado, California 92676 (949) 459 - 9600 www.com-power.com
Rev. D04.14
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