A medium-wave field-strength measuring receiver

摘要

This report describes a field-strength measuring system for the frequency range 510 — 1610 kHz. It incorporates a commercially available receiver, with some modifica¬tions. The loop aerial used with this receiver is mounted on the roof of a Cummer 2000 metal-bodied vehicle. The calibration arrangement, using a specially constructed unit with an oscillator, permits the receiver to give direct readings of the field strength over the range 30 uV/m to 10 V/m. The overall error, including that due to arbitrary orienta¬tion of the vehicle, is less than ±10%.