Rather than using conventional but somewhat useless two-tone tests. The FCC has changed someĬommercial voice tests to focus on spurious power level on adjacent channels, A peakĬomparison at some specified spacing misses too much.ĬW shares the same testing problems as FM and SSB. Gradually shaped slope even if the gradual sloped radio had less level. Next to me with a steep drop in clicks at 500Hz than one with a single-pole Not account for attenuation slope modulation sidebands. If I look on a peak sample and storage device like my spectrum analyzer, a radioĬould actually look worse yet bother adjacent CW bandwidth channels LESS than aĪ very narrow filter swept over the frequency with average storage of peaks does Level click that hammers on both make and break, like the FT1000MK V does. Higher peak level and actually do less damage to adjacent channels than a lower ThisĬauses peak energy to be higher in proportion to average energy. Some radios have a sharp click on one edge, and nothing on the other. It's pretty easy to see using the level (at one specific frequency) of a long-timeĪverage of signal peaks with a narrow filter sweeping by (which is what spectrum
Sweep and peak storage on a spectrum analyzer is not a good test. We really need to establish a standard for measurement of transmitters onīoth SSB and CW, and it should be the effective spurious power level on closeĪdjacent frequencies using typical CW bandwidth.
Yaesu should step up to the plate and be responsible, and set an example Real point is that both George and my suggestions are patches, they are notĬures. We don't need to watch output power and keep dutyĬycle to 50%, a slight adjustment of weight control would do the same thing. Reduced more than his method provides without affecting ability to work weak
KEYCLICK SOUND MOD
While his mod is certainly better than a stock Yaesu, clicks also can be Is any more useful that listening off-frequency on a known good receiver. Signal level measurement of the peaks accumulated in dozens or hundreds of scans Link) we use an established test method, I strongly disagree that a 15Hz BW While I agree with George's suggestion ( this I noticed W2VJN has proposed using absolute signal level at a fixed test Kevin analyzes key clicks mathematically.
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