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- Page 1 Page 1 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B INSTRUCTION MANUAL For Comb Generators Models CGO‐5100B 1 to 18 GHz, 100 MHz 19121 El Toro Rd ● Silverado, California 92676 ● (949) 459‐9600● com‐power.com REV021215 ...
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Page 2: Table Of Contents
Page 2 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B Table of Contents Introduction ...................... 3 2. 0 Product Specifications .................... 4 2.1 Other related Com‐Power Equipment that can be used with the Comb Generators. .. 4 3. 0 Important Precautions .................... 4 4.0 Warranty ........................ 5 4.1 Maintenance .......................... 5 5.0 Application and product operation ................ 6 5.1 Application .......................... 6 5.1.1 Operating Procedures ........................ 7 ... -
Page 3: Introduction
Page 3 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 1.0 Introduction This manual includes product specifications, safety precautions, product maintenance and warranty information. 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 or copied without permission from Com‐Power. 19121 El Toro Rd ● Silverado, California 92676 ● (949) 459‐9600● com‐power.com REV021215 ... -
Page 4: Product Specifications
Page 4 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 2. 0 Product Specifications Models: CGO‐5100B Electrical Frequency Range: 1 GHz to 18 GHz Frequency Step Size 100 MHz Frequency Stability 5 ppm Antenna Built in External Indicators Power on and Battery low Battery Type: Rechargeable 3.6 V, NiMH Charging adapter output 6 VDC, 500mA (Unregulated) Charging adapter input 115 /230 VAC, 60/50 Hz Charging time 8‐10 hours Operating time Approximately 18 hours Operating Temperature 15° C to 40° C / 59° F to 104° F Mechanical Dimensions W x H 6 x 1 inch / 15.24 x 2.54 cm Weight: 1 lbs / 0.45 kg ... -
Page 5: Warranty
Page 5 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 4.0 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. • Damages due to poor packaging. • Products operated outside their specifications. • Products Improperly maintained or modified. • Consumable items such as fuses, power cords, cables, etc. • Normal wear • Calibration • Products shipped outside the United States without the prior knowlege of Com‐ Power. ... -
Page 6: Application And Product Operation
Page 6 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 5.0 Application and product operation 5.1 Application Com‐Power CGO‐5100B Comb Generator is designed specifically for EMI Site verification testing up to 18 GHz. The CGO‐5100B has higher frequency stability of 5 ppm enhancing the accuracy of frequency output. A Comb Generators provide the fundamental and harmonics of the step frequency. The CGO‐ 5100B Comb Generator generates frequencies in 100 MHz steps. The fundamental frequency of 100 MHz and all harmonics up to 18 GHz are present at the output as soon as the power switch is turned on. For example, if viewed with a spectrum analyzer or EMI receiver, the output harmonics ... -
Page 7: Operating Procedures
Page 7 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 5.1.1 Operating Procedures Measure the emissions from the Comb Generator at a few standard frequencies and record the levels in a daily log prior to starting a radiated emissions test. • Set up the Comb Generator at the test site with the appropriate antenna. There may be some variation at higher frequency so consistently using the same direction minimizes the variation due to direction. For convenience, the Comb Generator has angle markings on the top. • Take measurement at discrete frequencies such as 1 GHz, 2 GHz, 5 GHz, 10 GHz, 12 GHz, 15 GHz, 18 GHz, etc. Record this in the daily log. • Compare this data with the daily log of prior readings to make sure that the pattern does not have abrupt changes from the established daily log at any frequency. This daily log is used to detect any test equipment or test site related problem as described below. 5.1.2 Problems Related to Test Equipment Variation on the daily log of the Comb Generator output data is dependent on the test equipment as well as test site. The Comb Generator replaces the EUT. The Comb Generator not only generates the output simultaneously at all the harmonics, and has very high output amplitude stability. This is achieved by utilizing a stabilized signal circuit as well as geometry of the radiator. With the variations due to the EUT practically eliminated, only variations remaining are due to other factors, mainly the test instrumentation and the test site. The variation due to test instrumentation is limited to the sum total of the tolerance on all test equipment used (spectrum analyzer, antenna, Comb Generator, cables). A few days of data will establish the range of variation to be expected at a site. Variation of less than + 3 dB is usually considered normal. Any variation in the readings above normal indicates a potential problem. ... -
Page 8: Problems Related To Test Site
Page 8 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 5.1.3 Problems Related to test site The above procedure cannot distinguish the problems related to a test site. The Comb Generator can be used in two ways to detect any problem with a test site. One method is to start the daily log immediately after the TEST SITE is calibrated. This way, one is certain about the validity of the TEST SITE. The second method is to calibrate the Comb Generator radiated output as absolute emission level. Such calibration is provided as an option with the Comb Generators. In addition, when difficulty arises with any EUT data taken at two different sites, the Comb Generator can be used to determine if both sites give reliable results, just by comparing the data at the two sites with the Comb Generator. In this case, if the two sites do not produce comparable results, the site with data matching closest to the Comb Generator’s absolute emission level can be considered more reliable. 5.1.4 Problems Related to Test Personnel The Comb Generator cannot directly help to eliminate the test personnel related problems. However, by increasing the confidence level and establishing definite procedures for eliminating test site and equipment related problems it helps tremendously in reducing the problems related to EMI measurements. ... -
Page 9: Battery Replacement
Page 9 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 5.4 Battery Replacement The replaceable battery pack can be accessed from the bottom of the Comb Generator. Six screws secure the cover to the battery compartment. Please charge the new batteries before first use to maximize operating time of the Comb Generator. 5.5 Troubleshooting Common problems Problem: No Output. A: Make sure the power switch is on and the green LED is lit. • Make sure the battery low indicator is not on. Check all the interconnecting cables, adapters and connectors from the receiving antenna to the receiver. Check the operation of the receiver and preamplifier. • Reduce resolution bandwidth and measurement span of the receiver to see if you can see the signal above the noise floor of your receiver. Problem: Battery low indicator remains lit even after charging for more than 5/6 hours. A: The battery may need to be replaced. However, before you replace the battery perform the following steps • Make sure the battery terminals are properly connected to the battery socket in the Comb Generator. Make sure you are charging Comb Generator only with supplied adapter. • Check the charging adapter to make sure it is supplying the proper voltage. The unloaded (without connecting it to the Comb Generator) voltage measured at the charger output jack should be at least 7.5Vdc to properly charge the Comb Generator batteries. If the charging adapter is not producing the proper voltage replace the adapter, otherwise replace battery and try charging it again. 19121 El Toro Rd ● Silverado, California 92676 ● (949) 459‐9600● com‐power.com REV021215 ... -
Page 10: Typical Radiated Output Of The Comb Generator
Page 10 of 10 INSTRUCTION MANUAL Comb Generator Models CGO‐5100B 6.0 Typical Radiated Output of the Comb Generator 19121 El Toro Rd ● Silverado, California 92676 ● (949) 459‐9600● com‐power.com REV021215 ...
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