background image

Comb

 

Generators

 

model

 

CGO

520

 

 

Page

 

6

 

of

 

11

                            

 

(949)

 

459

9600

 

 

www.com

power.com

  

Rev.

 

0216

 

  

  

 

Product Description

 

Overview

 

 

The

 

CGO

 

series

 

Comb

 

Generators

 

are

 

reference

 

signal

 

sources.

  

They

 

were

 

designed

 

for

 

EMC

 

laboratories

 

use.

 

It

 

is

 

ideal

 

for

 

quickly

 

detecting

 

malfunctioning

 

equipment

 

in

 

the

 

radiated

 

emissions

 

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

 

range.

 

If

 

any

 

abnormality

 

is

 

detected,

 

it

 

can

 

be

 

quickly

 

investigated

 

and

 

rectified

 

before

 

it

 

causes

 

measurement

 

errors.

  

 

The

 

Comb

 

Generators

 

can

 

also

 

used

 

for

 

comparing

 

two

 

or

 

more

 

sites

 

with

 

similar

 

setup.

 

They

 

can

 

also

 

be

 

utilized

 

as

 

conducted

 

signal

 

source

 

for

 

testing

 

Line

 

Impedance

 

Stabilization

 

Network

 

(LISN),

 

filters

 

and

 

cables.

  

 

Items

 

included

 

with

 

Comb

 

Generators

 

 

Equipment,

 

accessories,

 

and

 

documents

 

supplied

 

with

 

CGO

520

  

Comb

 

Generators

 

are

 

as

 

follows:

 

o

 

User's

 

guide

 

o

 

Custom

 

wooden

 

storage

 

box

 

o

 

Battery

 

Charger

 

adapter

 

o

 

Two

 

antennas

 

o

 

Test

 

data

 

(optional

 

reference

 

data

 

at

 

extra

 

cost)

 

 

 

 

 

Summary of Contents for CGO Series

Page 1: ...Comb Generators model CGO 520 Page 1 of 11 949 459 9600 www com power com Rev 0216 INSTRUCTION MANUAL For the Comb Generators CGO Series Models CGO 520 20 MHz step ...

Page 2: ...11 949 459 9600 www com power com Rev 0216 Table of Contents Product specifications 3 Important precautions and maintenance 4 Warranty information 5 Product Description 6 Controls Indicators 7 Theory 8 Application 9 Typical radiated output 11 ...

Page 3: ...able Frequency radiated 20 MHz 4 5 GHz 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 SMA f Operating temperature Range 5 C to 40 C Weight 2 lb max Circular base dimensions W x H 7 x 0 75 inches 17 7 x 1 9 cm Weight lb kg 2 lb 0 9 kg ...

Page 4: ...es 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...

Page 5: ...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 recom...

Page 6: ...g Comb Generator data taken at regularly the EMI lab can ensure that all the test equipment and accessories are operating within the expected range If any abnormality is detected it can be quickly investigated and rectified before it causes measurement errors The Comb Generators can also used for comparing two or more sites with similar setup They can also be utilized as conducted signal source fo...

Page 7: ...easurements Do not connect the Comb Generator conducted output to a Line Impedance Stabilization Network LISN that is connected to AC power We also do not recommend connecting the Comb Generator conducted output directly to a preamplifier input Power On indicator The green power on LED is lit the Comb Generator is powered on and output is available for measurement Battery Low indicator When red ba...

Page 8: ...on Such a pulse is not practical however the Model CGO 520 Comb Generators use this principle to get an output across a wide band The highly stable frequency output from the oscillator is used to generate an impulse with very short duration and sharp rise and fall times The shaping circuit was designed for improved stability extended frequency response and output impedance matching to 50 ohms The ...

Page 9: ...possible causes The EUT for example may have changed due to component variation temperature operating mode wear and tear design etc The test site may be a cause due to a reflective object near the site variation of ground saturation or ambient signal presence It also could be due to malfunctioning test instrumentation By establishing simple measurement procedure similar to the one described below ...

Page 10: ...ew days of data will establish the range of variation to be expected at a site This is generally less than 3 dB Any variation in the readings above normal variation indicates a potential problem After the daily log is established for a few days any problem is easily detected as a larger variation This procedure allows immediate detection of a major problem with the test equipment Problems Related ...

Page 11: ...1 949 459 9600 www com power com Rev 0216 Typical radiated output These are Comb Generator radiated output at 3 meter distance with the receiving antenna height varied from 1 to 4 meters taken in an open area test site Figure 1 20 MHz step size ...

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