Announcements

A.H. Systems Inc. has promoted these products / services:

A.H. Systems Inc. - Consider these factors when selecting an antenna

The antenna is one of the least understood components in an EMC test instrumentation set-up, and a poor choice of antenna(s) can lead to multiple problems including erroneous test data, failed tests, lengthy or difficult test procedures, and challenges with repeatability. Useful to beginners and the more experienced alike. (read more)

A.H. Systems Inc. - Electrostatic shielded loop antenna

This Passive Loop Antenna is an electrostatic shielded loop antenna that minimizes the E-field response and is an excellent solution for low frequency magnetic field emissions and immunity testing in the frequency range of 9K Hz to 30 MHz. (read more)

A.H. Systems Inc. - Octave bandwidth pyramidal horn antenna

The A.H. Systems' Octave Horn Antennas is an octave bandwith pyamidal horn antenna that offers excellent half power performance. With low VSWR, high input handling capability and rugged design make this horn antenna excellent for both immunity and emissions testing. (read more)

A.H. Systems Inc. - Annual recalibration is important

Annual recalibration is important to ensure repeatable and reliable data. At our facility, we calibrate our own antennas, as well as, most other brand antennas in accordance with SAE, ANSI, IEEE and CISPR specifications. (read more)

A.H. Systems Inc. - A.H. Systems' Double Ridged Guide Horn Antenna

High gain, low VSWR, input handling capability up to 800 watts CW, and rugged design make this horn antenna excellent for both immunity and emissions testing. (read more)

A.H. Systems Inc. - The A.H. Systems' Tuned Dipole Antenna Set

Tuned Dipole with 2 complete Sets in one case

This Tuned Dipole Set should be considered as a standard reference for frequencies below 1000 MHz. All Sets come contained in a rugged, lightweight storage case and includes four Baluns, Element extension rods, telescoping Elements, 10 Meter Cable, Tape Measure and a Clamp for tripod mounting. (read more)

A.H. Systems Inc. - Standard Gain Horn Antenna

This Standard Gain Horn Antenna will provide reliable, repeatable measurements. An ideal solution and a standard workhorse of any EMC test house for compliance testing. (read more)

A.H. Systems Inc. - Broadband Current Probe

With a usable frequency range of 10 KHz to 152 MHz the BCP-611 monitoring current probe is a great measurement tool for MIL-STD, CISPR and many automotive specifications. The 1V/A flat response of this current probe makes it ideal for a 1:1 comparison for conducted emission measurement and troubleshooting applications. (read more)

A.H. Systems Inc. - Broadband Preamplifier

This high gain preamplifier has a rugged perfomance over a wide operating frequency range. The added protection of the one watt limiter is an ideal solution when testing in high fields. (read more)

A.H. Systems Inc. -  High gain preamplifier

The PAM-1840 preamplifier will help overcome attenuation problems at higher frequencies. This high frequency preamplifier is an ideal solution for all your testing needs. (read more)

A.H. Systems Inc. - Calibration Fixture for Current Probes

Injection Probe calibration fixtures are a part of the test equipment required by most of the Bulk current Injection Test Procedure Specifications. (read more)

A.H. Systems Inc. - Loop Antennas: an efficient low cost solution

Whether used in a set to measure shielding effectiveness per MIL-STD 285 and NSA 65-6 or individually to satisfy specific requirements, the Loop Antenna is an efficient, low cost solution. (read more)

A.H. Systems Inc. - How to Perform a Radiated Emissions Measurement

This is a brief overview on how to perform a standard Radiated Emissions Measurement test. It includes how to set up, take measurements and calculate results. (read more)

A.H. Systems Inc. - Horn Antenna for immunity and emissions testing.

High gain, low VSWR, input handling capability up to 800 watts CW and rugged design make this DRG horn antenna excellent for both immunity and emissions testing. (read more)

A.H. Systems Inc. - Useful formulas for RF related conversions

Frequently used conversion factors, how they are derived, and why they are used. If you need to convert from one series of units to another for any reason, this is the tech. note for you. (read more)

A.H. Systems Inc. - Passive Loop Antenna for low frequency emissions

This 24" Passive Loop Antenna is electrostatically shielded and is an excellent solution for low frequency magnetic field emissions and immunity testing in the frequency range of 20 Hz to 1 MHz.

Features

  • 20 Hz to 1 MHz
  • Emissions and Immunity Testing
  • CISPR, MIL-STD compliance testing
  • Rugged Construction
  • Three Year Warranty
(read more)
A.H. Systems Inc. - Shielding effectiveness kit

A portable and economical approach to having all the antennas required for most shielding effectiveness testing. (read more)

A.H. Systems Inc. - Bilogical Antenna Kits for Rapid Deployment

Kits provides an inexpensive solution to broadband applications.

Each kit provides all the reliable antennas, current probes and accessories needed to satisfy a wide array of customer requirements. (read more)

A.H. Systems Inc. - EMC related Formulas

Frequently used conversion factors, how they are derived, and why they are used.

If you need to convert from one series of units to another for any reason, this is the tech. note for you. (read more)

A.H. Systems Inc. - The Importance of Antenna Beamwidth in RF Testing

Antenna beamwidth determines the expected signal strength given the direction and radiation distance of an antenna. The beamwidth will vary given a number of different factors such as the antenna type, design, orientation and radio frequency. Understanding beamwidth and how it influences a test environment is critical to accurate and repeatable tests. (read more)

A.H. Systems Inc. - Broadband Loop Antenna with preamplifier

Features

  • 1 KHz to 30 MHz
  • Individually Calibrated
  • FCC, MIL-STD, VDE and TEMPEST Testing
  • Rugged Construction
  • Three Year Warranty
(read more)
A.H. Systems Inc. - Battery Operated Active Monopole Antenna

A.H. Systems' Active Monopole Antenna provides superior performance in electric field measurements. The Active Monopole Antenna can drive any receiver with 50 ohm input impedance and will perform FCC, MIL-STD and TEMPEST tests. The SAS-550-1B includes a battery pack and charger for open field test sites that may not have ready access to outlets. (read more)

A.H. Systems Inc. - A broadband antenna that folds in half

The A.H. Systems SAS-512F-2 log periodic antenna is able to provide directivity and gain over a wide bandwidth. This antenna also folds in half for ease of storage, an optional transit storage case is ideal for portable applications. (read more)

A.H. Systems Inc. - non-magnetic & non-reflective antenna tripod

We're excited to unveil our new ATU-514 "non-magnetic and non-reflective" antenna tripod, a brand-new product made especially for compliance testing (read more)

A.H. Systems Inc. - SAS-563P Electrostatic shielded loop antenna

This 12" (30 cm) Passive Shielded Loop Antenna is an excellent solution for shielding effectiveness testing.

Features

  • 1 KHz to 30 MHz
  • Individually Calibrated
  • Rugged Construction
  • Three Year Warranty
(read more)
A.H. Systems Inc. - Passive monopole transmitting from 9 KHz - 40 MHz

A.H. Systems' Passive Monopole Antenna provides superior performance in electric field measurements. The Passive Monopole Antenna is used for transmitting to perform shielding effectiveness and immunity testing. (read more)

A.H. Systems Inc. - Equivalent Capacitance Fixture Kit

This Equivalent Capacitance Fixture is used for the verification and calibration of the active monopole antennas. (read more)

A.H. Systems Inc. - Low frequency omni-directional antenna

Features

  • 9 KHz to 60 MHz
  • Individually Calibrated
  • FCC, MIL-STD, VDE and TEMPEST Testing
  • Rugged Construction
  • Three Year Warranty
(read more)
A.H. Systems Inc. - Bilogical Antenna Kit AK-521F-7

An inexpensive solution to broadband applications

For rapid deployment along with the mobility of a small package, this Bilogical Antenna Kit, Model AK-521F-7, provides consistent and reliable measurements. Suitable for FCC, MIL-STD, VDE, TEMPEST, and immunity testing. (read more)

A.H. Systems Inc. - AK-285R and AK-285T antenna kits

The A.H. Systems AK-285R and AK-285T antenna kits includes all of the required antennas needed to perform shielding effectiveness. Each component has a specific storage compartment in the carrying case therefore, loss and breakage are virtually eliminated. (read more)

A.H. Systems Inc. - Antenna Selection by Test Type

A listing of some of the common test types and the appropriate antennas to perform that test. (read more)

A.H. Systems Inc. - Shielding Effectiveness Test Guide

Just as interference testing requires RF enclosures, isolation systems in turn need their own testing. Here is a listing for test antennas and resources required to perform shielding effectiveness testing. (read more)

A.H. Systems Inc. - Recommended Antenna Maintenance

While it is not neccessary before each test, these maintenance mesures go a long way. Not only will they keep critical features in working order, they can also help protect and extend the life of your antenna. (read more)

A.H. Systems Inc. - Dipole Antenna TV-2

Designed per the FCC specitications, this Tuned Dipole Antenna is ideal for broadcast field measurements.

Features

  • 325 MHz to 1000 MHz
  • Individually Calibrated
  • FCC, MIL-STD, VDE and TEMPEST Testing
  • Rugged Construction
  • Three Year Warranty

Webinar - "The 10 Factors You Need to Consider When Selecting... (read more)

A.H. Systems Inc. - Dipole antennas for precise EMI measurements.

These half-wavelength dipole antennas are an ideal solution for precise EMI measurements. (read more)

A.H. Systems Inc. - HOW TO USE ANTENNA FACTORS

An antenna's antenna factor (AF) is a comparison between the field level presented to the antenna and the actual voltage produced by the antenna at it's connector. (read more)

A.H. Systems Inc. - Removing the evil in RF testing!

There are a number of ways that mistakes with preamps in test configurations can lead to misleading or incorrect readings or even damaged equipment and unnecessary costs. With some attention and proper equipment matching, results will be accurate and useful, and expenses will remain at a minimum. (read more)

A.H. Systems Inc. - dBm, Volts, Watts Conversion - A.H. Systems

dBm is defined as power ratio in decibel (dB) referenced to one milliwatt (mW). It is an abbreviation for dB with respect to 1 mW and the "m" in dBm stands for milliwatt.

Click here to download the spreadsheet containing the calculations.

View our other RF Coversion formula sheets:

Useful formulas for RF related conversions
Antenna Factor and Gain Calcula... (read more)

A.H. Systems Inc. - Injection Current Probe ICP-621

Features

  • 10 KHz to 100 MHz
  • Individually Calibrated
  • Rugged Construction
  • Three Year Warranty
  • MIL-STD-461 CS114
(read more)
A.H. Systems Inc. - Adjustable telescoping dipole antenna

Efficient performance covering the common broadcasting frequencies.

Features

  • 50 MHz - 220 MHz
  • Individually Calibrated
  • Receive and Transmit
  • Specifically created to cover the VHF and UHF channels
  • Rugged Construction
  • Three Year Warranty
(read more)
A.H. Systems Inc. - H-Field Rods for magnetic field testing.

For applications where high sensitivity is required, A.H. Systems set of H-Field Rods provides an accurate standard for magnetic field testing. (read more)

A.H. Systems Inc. - Equivalent Capacitance Fixture for antennas

The Equivalent Capacitance Fixture is used for the verification and calibration of the active monopole antennas per the MIL-STD 461 standard. (read more)

A.H. Systems Inc. - Folding Biconical antenna for portability

You asked for convienence....

We have created the SAS-542 just for those concerned with portability issues (read more)

A.H. Systems Inc. - Biconical Antenna SAS-547

A.H. Systems SAS-547 Biconical Antenna is a broadband high frequency antenna. It's omni-directional radiation pattern is ideal for electromagnetic field monitoring. This broadband, high-frequency biconical antenna is designed specifically for broadband Field monitoring. (read more)

A.H. Systems Inc. - Advantages of Antenna Rental

Here are a few reasons you should consider renting vs. purchasing:

  • Saves time and money with immediate delivery
  • Provides cost-effective solutions for short-term projects or overload
  • Protects against capital investments and product obsolescence
  • Provides the ability to evaluate equipment before purchasing
  • Avoids wasting time and.../li>
(read more)
A.H. Systems Inc. - Why Choose A.H. Systems for your antenna rentals?

For over 40 years, we have proven to be a leading manufacturer of EMC test antennas and accessories. Our knowledgeable staff will work with you to provide the most complete antenna solution to fit your testing requirements. Our inventory is fully tested and inspected before leaving our facility. (read more)

A.H. Systems Inc. - Antenna Calibration Services

Annual recalibration is important

• Calibration Frequency Range of 20 Hz to 40 GHz
• Quick Turnaround Times
• Low Measurement Uncertainty
• Custom In-House software for a greater calibration accuracy
• Expert Calibration and Characterization Services Since 1974 - Experience Counts (read more)