background image

A.H. Systems Model Active Monopole Antennas

 A.H. Systems inc. – October 2005

REV A

1

Active Monopole

Antenna Series

Operation Manual

Summary of Contents for active monopole series

Page 1: ...A H Systems Model Active Monopole Antennas A H Systems inc October 2005 REV A 1 Active Monopole Antenna Series Operation Manual ...

Page 2: ...tive Monopole Antennas A H Systems inc October 2005 REV A 2 TABLE OF CONTENTS WARRANTY 3 INTRODUCTION 4 SPECIFICATIONS 6 OPERATING INSTRUCTIONS 8 ANTENNA FORMULAS 10 PREAMPLIFIER ALIGNMENT 11 CALIBRATION 12 MAINTENANCE 13 ...

Page 3: ...e 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 by a part not supplied by A H Systems acciden...

Page 4: ...ntennas A H Systems inc October 2005 REV A 4 INTRODUCTION Model Model Number Part Number Description SAS 550 1B 9KHz 60 MHz 2380 Active Monopole Antenna Battery Powered SAS 550 2B 100Hz 60 MHz 2381 Active Monopole Antenna Battery Powered ...

Page 5: ...s 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 2000M Temperature of 5 C to 40 C Maximum relative humidity 80 for temperatures up to 31...

Page 6: ...ipment impedance is compatible with the receiver impedance ANTENNA SPECIFICATIONS The SAS 550 1B Active Monopole Antenna specifications Frequency Range 9 KHz 60 MHz Antenna Factor dB m 0 1 Flatness 0 5 dB from 20KHz to 30 MHz 5dB whole range Sensitivity 5 dBuV M 10 KHz 20 dBuV M 1 MHz Dynamic Range 96 dB 10 KHz 122 dB 1 MHz Saturation Output Connector Type BNC f Input Power 12VDC Battery Weight 4 ...

Page 7: ... The on off toggle switch is a locking type to prevent accidental turn on or turn off Pull out on the toggle handle and push up to turn amplifier power on Pull out and push down to turn off The POWER indicator LED will light and stay lit as long as the battery has sufficient voltage to power the preamplifier If the LED does not light do not use the preamplifier until the battery has been recharged...

Page 8: ...ion to charge the battery One hour of amplifier operation will be obtained for each hour of charge up to a maximum of 8 hours operation Charging for up to 24 hours will not damage the battery Using the battery charger to operate the amplifier directly is not recommended ECF 10 Equivalent Capacitance Fixture The ECF 10 is an equivalent capacitance fixture constructed per IEEE 291 and ARP 958 This i...

Page 9: ...ber is to be added to the receiver reading in dBuV in order to convert to field intensity in dBuV Meter EXAMPLE Assume the transmitter to be measured is operating at 1 MHz and the receiver reading indicates 44 0 dBuV AF dB m 0 1 Receiver reading dBuV 44 dBuV Cable loss dB 0 7 Field Intensity AF receiver reading cable loss Field Intensity 0 1 44 0 0 7 Field Intensity 44 8 dBuV Meter ...

Page 10: ...erator to the spectrum analyzer as shown in Figure 3 and the 50Ω load connected to the antenna signal output port B Save trace as trace A Connect the tracking generator cable to the fixture terminated with 50Ω A and connect the spectrum analyzer cable to the signal output port B per Figure 3 Adjust the resistor pots R6 R7 and R8 Figure 1 to match the following curve Figure 2 R6 adjusts high freque...

Page 11: ...nna element to the 50 ohm impedance of the measurement receiver The 10 pF capacitor ensures that the correct source impedance is present during the check For measurement system checks establishing the correct voltage at the input to the 10 pF capacitor can be confusing Since the electrical length of the 104 cm rod is 0 5 meters the conversion factor for the induced voltage at the input to the 10 p...

Page 12: ...nector A measure the received signal voltage VL in dBµV at the signal output port B Leaving the RF output of the signal generator unchanged transfer the 50Ω termination to the signal output port B and transfer the receiver input cable to the T connector A Measure the drive signal voltage VD in dBµV Subtract VL from VD and add 6 dB to obtain the antenna factor in dB of the antenna Records providing...

Page 13: ...m performance annual re calibration of your pre amplifier 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 http www AHSystems com or call 1 818 998 0223 ...

Reviews: