Com-Power CGC Series User manual

Conducted Comb Generator model CGC-255E & CGC-510E Page 1 of 15
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INSTRUCTION MANUAL
For the
Conducted Comb Generators
CGC Series
Models CGC-255E / CGC-510E
50 or 250 kHz step / 100 or 500 kHz step

Conducted Comb Generator model CGC-255E & CGC-510E Page 2 of 15
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Table of Contents
Introduction .............................................................................................................................. 4
Product specifications ....................................................................................................... 5
Other Comb Generator models available from Com-Power .......................................... 5
Important precautions and Maintenance ................................................................. 6
Precautions ........................................................................................................................... 6
Maintenance ......................................................................................................................... 6
Battery care and instructions ............................................................................................ 6
To avoid any risk of explosion ......................................................................................... 6
Environmental Conditions ................................................................................................ 7
Warranty ..................................................................................................................................... 8
Product Description ............................................................................................................. 9
Overview................................................................................................................................... 9
Items included with each Comb Generator. .................................................................. 9
Controls & indicators ........................................................................................................ 10
Front Panel.............................................................................................................................. 10
Output connector /plug .................................................................................................... 10
Back Panel .............................................................................................................................. 10

Conducted Comb Generator model CGC-255E & CGC-510E Page 3 of 15
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Power ................................................................................................................................... 10
Frequency selection switch ............................................................................................. 11
Green LED .......................................................................................................................... 11
Battery Low indicator ....................................................................................................... 11
Theory ....................................................................................................................................... 12
Application .............................................................................................................................. 13
Measurement Procedure ...................................................................................................... 13
Typical Direct Output ........................................................................................................ 14

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Introduction
This manual provides on how maintain and use the CGC series Conducted Comb Generator.
Information contained in this manual is the property of Com-Power Corporation. It is issued
with the understanding that none of the material may be reproduced of copied without
permission from Com-Power.

Conducted Comb Generator model CGC-255E & CGC-510E Page 5 of 15
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Product specifications
Models covered: CGC-255E / CGC-510 E
Frequency step size: 50 & 250 kHz step / 100 & 500 kHz
Output Variation*: < ± 1 dB
Usable Frequency: 50 kHz – 115 MHz (CGC-255E)
100 kHz – 115 MHz (CGC-510E)
Internal Battery Type: 6 V Rechargeable NimH
Battery charger adapter specifications:
- Input: 115 / 230 VAC, 60 / 50 Hz
- Output: 6 VDC @ 500 mA (unregulated)
- Plug type: 2.5 ID x 5.5 OD mm (center pin positive)
Output connector type: 3 pole North American plug (NEMA 5-15)
Operating temperature Range: 5°C to 40°C
Weight: 2 lb. (max.)
Circular base dimensions (W x H) : 5 x 2.2 x 2.2 inches / 13.2 x 5.9 x 5.9 cm
Weight (lb / kg): 1 lb / 0.5 kg
*Output variation with Comb Generator connected directly to EMI receiver or spectrum analyzer.
Other Comb Generator models available from Com-Power
 CGO-520 Comb Generator, 20 MHz step
 CGO-5100B Comb Generator, 100 MHz step
 CGO-51000 Comb Generator, 1 GHz step
 CGO-501 Comb Generator, 1 MHz step
 CGO-505 Comb Generator, 5 MHz step
 CGO-515 Comb Generator, 1 or 5 MHz step

Conducted Comb Generator model CGC-255E & CGC-510E Page 6 of 15
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Important precautions and Maintenance
Precautions
The Conducted Comb Generator is an conducted signal source designed to produces signals
over wide frequency range to verify conducted emissions test setup that utilize Line Impedance
Stabilization Networks. It was designed for use in EMI test laboratory.
Denotes: Read and understand user manual carefully before operating the
equipment.
Maintenance
There are no user serviceable parts inside the unit. User modifications to the Comb Generator
will void warranty. The Comb Generator uses re-chargeable NimH batteries. Call the factory if
the battery needs replacement. Send Comb Generator to authorized Com-Power service center
if needs repair. Please visit our website at www.com-power.com to request a return
merchandise authorization number (RMA) before you send the unit in for service.
Battery care and instructions
To avoid any risk of explosion
 Replace batteries with the size and type specified in this manual.
 Do not dispose of batteries in a fire or trash incinerator, or leave batteries under direct
sunlight.
 Do not immerse batteries in water or otherwise get them wet.
 Do not charge batteries, that appear to be leaking, discolored, rusty, deformed; emit an
odor
 Use only battery charger adapter supplied with the Comb Generator to charge the
batteries.

Conducted Comb Generator model CGC-255E & CGC-510E Page 7 of 15
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Environmental Conditions
This equipment is designed for indoor and outdoor use and is safe under the following
environmental Conditions:
 Temperature: 5° C to 40° C
 Maximum relative humidity: 80%

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Warranty
Com-Power warrants to its Customers that the products it manufactures will be free from
defects in materials and workmanship for a period of 3 years. This warranty shall not apply to:
 Transport damages during shipment from your plant.
 Product operated outside their specification.
 Improperly maintained or modified.
 Consumable items, fuses, power cords, cables, etc.
 Normal wear
 Calibration
 Product is shipped outside the United States without the prior knowlege of Com-Power.
In addition, Com-Power shall not be obliged to provide service under this warranty to repair
damage resulting from attempts to install, repair, service or modify the instrument by
personnel other than Com-Power service representative.Under no circumstances does Com-
Power recognize or assume liability for any loss , damage or expense arising, either directly or
indirectly from the use or handling of this product, or any inability to use this product
seperately or in combination with other equipment.
When requesting warranty services, it is recommended that the original packaging material be
used for shipping. Damage due to improper packaging will void warranty.
In the case of a complaint, a label should be attached to the housing of the instrument which
describes briefly the faults observed. If at the same time the name and telephone number
(dialing code and telephone or direct number or department designation) is stated for possible
queries, this helps towards speeding up the processing of waranty claims. In order to obtain
service under this warranty, Customers must contact the Com-Power.

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Product Description
Overview
The CGC series Comb Generators are reference signal sources for verifying conducted emissions
test setup which uses Line Impedance Stabilization Networks. They were designed for EMC
laboratories use. They are ideal for quickly detecting malfunctioning equipment in the test
setup in between full calibration intervals. These malfunctions may go undetected, unless it
they are checked often. Full site calibration although more accurate is time consuming is not
practical for a quick test. By comparing Comb Generator data taken at regularly, the EMI lab
can ensure that all the test equipment and accessories are operating within the expected
operating range. If any abnormality is detected, it can be quickly investigated and rectified
before it causes measurement errors.
The conducted Comb Generators can also be used for comparing two or conducted emissions
test setups
Items included with each Comb Generator.
Equipment, accessories, and documents supplied with the model CGC-255E and CGC-510E
Comb Generators are as follows:
o User's guide
o Custom wooden storage box
o Battery Charger adapter
o Test data (optional reference data at extra cost)

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Controls & indicators
Front Panel
Output connector /plug
The comb generator output is available on the North American Plug (NEMA 5-15) located on
the front. This allows the Comb Generator to be plugged directly into the LISN that uses a
matching socket for powering equipment under test. If the LISN has other types of power
connection, please call Com-Power for assistance or use a suitable adapter.
Please do not connect the NEMA 5-15 plug of comb generator into the LISN
while the LISN is plugged into a live AC/DC power source it could lead to
potentially hazardous situation that might result in personnel injury. Please
ensure to disconnect the power to the LISN before plugging in the comb
generator.
Back Panel
Power