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A.H. Systems Model SAS-551 Passive Monopole Antenna

©

A.H. Systems inc.

– REV E

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SAS-551 Passive

Monopole Antenna

Operation Manual

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Summary of Contents for SAS-551

Page 1: ...A H Systems Model SAS 551 Passive Monopole Antenna A H Systems inc REV E 1 SAS 551 Passive Monopole Antenna Operation Manual ...

Page 2: ...del SAS 551 Passive Monopole Antenna A H Systems inc REV E 2 TABLE OF CONTENTS INTRODUCTION 3 SPECIFICATIONS 5 OPERATING INSTRUCTIONS 6 CALCULATIONS 9 CALIBRATION 10 CONVERSION FORMULAS 12 MAINTENANCE 13 WARRANTY 14 ...

Page 3: ...A H Systems Model SAS 551 Passive Monopole Antenna A H Systems inc REV E 3 INTRODUCTION Model Frequency Range Part Number Description SAS 551 9 kHz 40 MHz 2348 Passive Monopole Antenna ...

Page 4: ... operated in a location which will control the radiated energy such that it will not cause injury and will not violate regulatory levels of electromagnetic interference RANGE OF ENVIRONMENTAL CONDITIONS This equipment is designed to be safe under the following environmental conditions Indoor use Altitude up to 2 km Temperature 5 C to 40 C Maximum relative humidity 80 for temperatures up to 31 C De...

Page 5: ...hich cover the 10 KHz 40 MHz frequency range Each unit comes with a telescoping rod and ground plane Review this manual and become familiar with all safety markings and instructions ANTENNA SPECIFICATIONS SAS 551 Monopole Antenna specifications Frequency Range 9 kHz 40 MHz Input Connector Type BNC f Mounting Base 1 4 20 Tread f Weight 3 5 lbs Size W x H x D 18 x 18 x 41 46 cm x 46 cm x 104 cm ...

Page 6: ...n on the female connector on top of the amplifier Do not apply excessive sideways force as this can cause the antenna center pin to break SETUP INSTRUCTIONS The ground plane can be mounted to any tripod with a 1 4 20 attaching stud Extend the rod antenna to 41 104 cm above the ground plane Connect the output BNC connector on the side of the antenna to the output of a 50 generator or amplifier Esta...

Page 7: ...ation plus any cable loss When making a measurement mount the antenna on an appropriate mast or tripod Caution It is recommended to load the monopole input with 50 ohms or use a power resistor connected in parallel with the antenna if the signal generator or power amplifier used to drive the antenna requires a 50 ohm match This requirement is typical for antennas with short radiators radiator leng...

Page 8: ...a A H Systems inc REV E 8 Standard 3 meter BNC m to BNC m RF cable made with RG 58 Optional ferrite loading and custom lengths can be made to your specifications Other cable types available upon request Adapters Need an Adapter We stock those as well ...

Page 9: ...ments add antenna factor plus cable loss to receiver reading in dB V to convert to field strength in dB V meter Field Strength dBuV m SA dBuV AF dB m cable loss dB SA Spectrum Analyzer or Receiver voltage reading AF Antenna Correction Factor CL Cable Loss in dB IMMUNITY TESTING For Immunity measurements the generated electric field strength can be calculated by FS Approximate Field Strength in V m...

Page 10: ...ted to 1 04m m a average radius of the antenna element 6 17mm m λ wavelength in meters Ca capacitance of the dummy load NOTE Other fixtures with different capacitance are available as an option Effective Height Calculation The correction factor for the calibration is dependent on the effective height of the monopole The effective height calculation is he λ 2π tan 2 π h λ Eq 2 where λ wavelength in...

Page 11: ...e signal voltage VD in dB V at the T connector A Also referred to as a Dummy Antenna Figure 2 2 Leaving the RF output of the signal generator unchanged transfer the 50 termination to the T connector A and transfer the receiver input cable to the signal output port B Measure the output signal voltage VL in dB V 3 The antenna factor in dB is calculated by the following equation AF dB VD VL 20 Log he...

Page 12: ... 25 dBA to dB A dB A dBA 120 A m to T T 1 25 A m dB A to dBA dBA dB A 120 E FIELD ANTENNAS LOG LINEAR POWER Correction Factor dB V m dB V AF dBm to Watts W 10 dBm 30 10 Field Strength V m 30 watts Gain numeric meters Watts to dBm dBm 10log W 30 Required Power Watts V m meters 2 30 Gain numeric dBW to Watts W 10 dBW 10 LOOP ANTENNAS Watts to dBW dBW 10log W Correction Factors dB A m dB V AF dBW to ...

Page 13: ...rmance annual re calibration of your active monopole preamplifier by A H Systems experienced technicians is recommended Our staff can recalibrate almost any type or brand of antenna For more information about our calibration services or to place an order for antenna calibration visit our website at www AHSystems com or call 818 998 0223 ...

Page 14: ...ithin the warranty period commencing with the delivery of the product by A H Systems The remedy set forth herein shall be the only remedy available to the buyer and in no event shall A H Systems be liable for direct indirect incidental or consequential damages This warranty shall not apply to any part of the product which without fault of A H Systems has been subject to alteration failure caused b...

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