receiver test data (terms explained doc pdf) sorted by third-order dynamic range narrow spaced - or- arrl rmdr (reciprocal mixing dynamic range) if phase noise limited note the term blocking only applies to a superhet radio. For a direct sampling radio the value in the blocking column is the adc overload point reference receiver noise floor. Amateur ssb exciters and power amplifiers are often specified to have a typical imd specification - 26-30 db at a specific pep output level. This means that the third order imd products (the ones generated closest to the desired signal but outside the 2. 5-3 khz passband), are only 26-30 db below the peak power level specified. 101 mhz showing imd of 64db relative to single tone (70db arrl method). while writing these ham radio base station reviews, we realized that ham radio is a high-quality receiver. You see, while receivers are listening to the audio, they can as well view the graphics signal location. jim w6lg plays recordings of an elecraft k3s and a yaesu ft-450. Which sounds best to you? Vote for receiver 1 or receiver 2 and give a very short description as to why. Slide show (ppt or pdf) click to listen, or to save, right click & save targetlink. Kenwood amateur radio products are sold world-wide, building on a reputation for outstanding audio quality both on transmit and receive - since 1955. The collins 75a-4 receiver b low interelectrode capacity and high trans-conductance, and performed measurably better at high frequencies than the earlier receivers octal tubes). A comparison of arrl lab data for selected transceivers by jim brown, k9yc mirror. My friend walter, ve7wrs website (including testing) a presentation on rf test & measurement by walter ve7wrs and myself at nsarc. Intermodulation (im) or intermodulation distortion (imd) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system. The intermodulation between frequency components will form additional components at frequencies that are not just at harmonic frequencies (integer multiples) of either, like harmonic distortion, but.