Broadcast Field Measurements - Antenna Selection by Application

For broadcast stations, field strength measurements must be made at known locations around the antenna system. These measurements should be made on a regular interval with a calibrated antenna. Measurements must be made of the stations fundamental frequency as well as the side lobes and harmonics to meet the spectrum mask required by the regulatory body.


Broadcast Field Measurement Products


Dipole Antenna Set

TDS-535

25 MHz - 1 GHz

These half-wavelength dipole antennas are an ideal solution for precise EMI measurements.

Dual Dipole Antenna Set

TDS-535-2

25 MHz - 1 GHz

Here is a dual set of half-wave dipole reference antennas ideal for NSA measurements.

Broadcast dipole antenna

TV-1

50 MHz - 220 MHz

This dipole antenna has an efficient perfomance covering the common braodcasting frequencies.

TV-2 Dipole Antenna

TV-2

325 MHz - 1 GHz

This half-wave tuned dipole antenna is ideal for broadcast field measurements.

Active Monopole Antenna

SAS-550-1B

9 KHz - 60 MHz

A.H. Systems Active Monopole Antenna is an active, general-purpose, broadband monopole antenna.

1 GHz Biconical Antenna

SAS-545

30 MHz - 1 GHz

This high frequency Biconical Antenna is an ideal solution for high frequency, broadband, omni-direction requirements.

High Frequency Biconical Antenna

SAS-547

1 GHz - 18 GHz

This broadband, high-frequency biconical antenna is designed specifically for broadband Field monitoring.

Tripod Carrying Case

TCC-510

Tripod Carrying Case

This tripod carrying case will house any of our tipods and made with heavy duty material for add protection.

Wood Tripod

ATU-510

Wood Tripod

The ATU-510 Tripod is used to position, support, and stabilize most compliance test antennas.

Helpful Resources


AM, FM and TV Frequencies

AM, FM and TV Frequencies

Application Note

In order to help better identify signals of interest from ambient signals that might already be in the area, we have included a table of VHF, UHF, and FM frequencies, as a companion to our TDS-536 TV Dipole set, specifically designed for testing at these frequencies.

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Frequency band designations

Frequency Band Designations

Application Note

Here is a listing of the letter designations that are assigned to the frequency bands for the radio spectrum up to 300 GHz

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Dipole Antenna Element sizes

Tuneable Dipole element lengths

Application Note

Our tunable dipole antennas have a set of telescoping elements that needs to be adjusted to the frequency of interest. Here is a lookup table of our Tuned Dipole Antennas and the appropriate element lengths for each balun.

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RF Equations - and other useful formulas


dBm to Volts to Watts Conversion

dBm to Volts to Watts Conversion

Formulas and Calculations

Here is a handy page to convert units from dBm to to Volts to Watts based on a 50 ohm system.

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Frequency WaveLength Calculator

Frequency Wavelength Calculator

Formulas and Calculations

Here is a little handy calculator that can calulate the wavelength of a frequency or frequency of a wavelength in several different units. This calculator is useful for calculating the requred antenna element length of a dipole or rod antenna for the frequency of interest.

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Typical EMC Formulas

Typical EMC Related Formulas

Formulas and Calculations

This Tech. Note covers 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.

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