AM Radio Field Strength Measurements with Confidence November 2004 Understanding the AM Broadcast signal The AM Broadcast service in the United State
APPENDIX B Working with Antenna Factors Antenna Factors are the key to accommodating all of the external variables affecting the field strength meter
APPENDIX C Measurement Unit Conversion Chart 0dBm = 1 milliwatt into 50 ohms (Note: 0dBuV is referenced to 1 uvolt into 50 ohms) mV uV
proof of performance or field strength measurements are to be made, AM Stations should bypass any processing that makes the audio modulating waveform
channel station. The null is bi-directional, however, sometimes limiting the measurement effectiveness when the station’s antenna pattern null is in a
measurement instruments can accumulate accurate data much faster and more flexibly than early models. Equipment calibration The Z Technology Field
For signal coverage measurements, the recommended antenna system is the AA-2R Ruggedized Active Monopole Antenna with AA-2M Magnetic Mount. This ante
be used with a Z Technology BC-BCB block converter and appropriate antenna for AM Broadcast measurements. A sample step-by-step measurement checklis
APPENDIX A Procedure for Mobile Field Strength Measurements 1. Assemble your measurement system: a. Programmable field strength meter with fresh b
i. Select direct low frequency readout using meter Function 13. This is done by selecting F13 on the meters front panel and setting the instrument to
b. Select readout units in dBuV to be sure signal at the FSM input is within the range +90dBuV to +10dBuV. Install 50 ohm pad at input to block conve
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