Related Manuals for A.H. Systems EHA-51B
Summary of Contents for A.H. Systems EHA-51B
- Page 1 A.H. Systems Model EHA-51B Active Monopole and Loop Antenna EHA-51B Active Monopole and Loop Antenna Operation Manual A.H. Systems inc. – Oct 2017 REV B...
-
Page 2: Table Of Contents
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna TABLE OF CONTENTS Introduction ..............3 Specifications..............5 Operating Instructions ............7 Recommended Accessories .........10 Calculations ..............11 Antenna Formulas ............12 Maintenance..............13 Warranty ...............14 A.H. Systems inc. – Oct 2017 REV B... -
Page 3: Introduction
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna INTRODUCTION Frequency Part Model Range Number Description EHA-51B 1 kHz – 30 MHz 2661 Active 12” Loop/Monopole Antenna INCLUDED EQUIPMENT Amplifier/matching base unit • 12” shielded loop antenna • 41” telescoping rod antenna element •... - Page 4 A.H. Systems Model EHA-51B Active Monopole and Loop Antenna INTENDED PURPOSES This equipment is intended for general laboratory use in a wide variety of industrial and scientific applications and designed to be used in the process of generating, controlling and measuring high levels of electromagnetic Radio Frequency (RF) energy.
-
Page 5: Specifications
(without tuning) of electric fields in its frequency range and can drive any receiver with 50-ohm input impedance. The EHA-51B is also an active receive only loop antenna for magnetic field testing. This loop antenna is ideal for emissions testing and has a balanced Faraday shield to reduce the E-field response for a pure magnetic field measurement. - Page 6 A.H. Systems Model EHA-51B Active Monopole and Loop Antenna TYPICAL CORRECTION FACTOR A.H. Systems inc. – Oct 2017 REV B...
-
Page 7: Operating Instructions
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna OPERATING INSTRUCTIONS ASSEMBLY INSTRUCTIONS To prepare the antenna for operation, select the appropriate antenna switch on the side of the impedance matching/amplifier base and attached the corresponding antenna element. The telescoping rod antenna element will require a BNC(f) to N(m) adapter. - Page 8 A.H. Systems Model EHA-51B Active Monopole and Loop Antenna GENERAL USE INSTRUCTIONS The EHA-51B loop antenna is an active loop designed to perform magnetic field and shielding effectiveness testing. The loop antenna has a balanced Faraday shield to reduce the E-field response for a pure magnetic field measurement.
- Page 9 A.H. Systems Model EHA-51B Active Monopole and Loop Antenna CHARGING THE BATTERY Position the input voltage selector to the proper voltage (either 110 – 120 Vac, 60 Hz or 220 – 240 Vac, 50 Hz). Be sure to check the available voltage and adjust the voltage selector as needed before use.
-
Page 10: Recommended Accessories
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna RECOMMENDED ACCESSORIES The following is a recommend accessory list for the EHA-51B Active Monopole/Loop Antenna: ECF-10 The ECF-10 is an equivalent capacitance fixture constructed per IEEE 291 and ARP 958. This is an indispensable tool used for gain adjustment and calibration of the active monopole antennas. -
Page 11: Calculations
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna CALCULATIONS EMISSIONS TESTING Individual calibration data for the active loop antenna is supplied to comply with various emissions test requirements. For emissions measurements, add antenna factor plus cable loss to receiver reading in dBV to convert to field strength in dBA/meter. -
Page 12: Antenna Formulas
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna TYPICAL ANTENNA FORMULAS LOG -> LINEAR VOLTAGE FIELD STRENGTH & POWER DENSITY ((dB V – 120) / 20) dBV to Volts V = 10 dBV/m to V/m V/m = 10 (((dBV/m) -120) / 20) Volts to dBV... -
Page 13: Maintenance
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna MAINTENANCE To ensure reliable and repeatable long-term performance, annual re-calibration of your active loop preamplifier by A.H. Systems’ experienced technicians is recommended. Our staff can recalibrate almost any type or brand of antenna. -
Page 14: Warranty
A.H. Systems Model EHA-51B Active Monopole and Loop Antenna WARRANTY INFORMATION A.H. Systems Inc., warrants that our Antennas, Sensors and Probes will be free from defects in materials and workmanship for a period of three (3) years. All other products delivered under contract will be warranted for a period of two (2) years.