General Performance of Amplitude Modulated PDM Transmitters for Digital Broadcasting using the IBOC System
نویسنده
چکیده
This paper describes and discusses the results of tests carried out on two families of PDM (Pulse Duration Modulation) AM transmitters. A variety of tests have been done using two tone techniques to evaluate the transmitters for linearity. Testing was carried out both into a 50 ohm resistive load and into a bandpass load to simulate the effects of a limited bandwidth antenna as proposed by USA Digital Radio. The paper discusses the various aspects of PDM transmitter design and how they contribute to its performance as a linear amplifier. The results are compared against current specification requirements for the IBOC DAB (In-Band-On-Channel Digital Audio Broadcast) system as proposed by USA Digital Radio.
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