Kenwood TS-480 manual RX dynamic range

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How well does it actually perform? Fig. 8 is a graph illustrating the dynamic range characteristics when changing the separation of two interfering signals. For the sake of reference, results for the TS-480 are plotted against those obtained using other compact mobile transceivers (on the market) under the same conditions.

Fig. 8: RX dynamic range

Looking at Fig. 8, results higher up the graph indicate wider dynamic range.

When the RX frequency is 14.100MHz, and for example there is simultaneous interference from two signals at 14.150MHz and 14.200MHz, with the nonlinearity of the RX section, spurious signals are generated at 14.100MHz and 14.250MHZ, enabling reception. Since the frequency separation at this point is 14.200MHz -14.150MHz = 50kHz, the +50.0KHz point on the horizontal axis of Fig. 8 corresponds to these conditions. Under these conditions, if there were interfering signals that were faintly picked up by the other transceivers in this comparison, the strength of those interfering signals would have to rise by 10~15dB for the TS-480 to begin suffering the same effects.

When there is interference in close proximity to the RX frequency, there is no difference between these models, with one notable exception. In this area we are approaching the bandwidth of the roofing filter, so to put it another way, the fact that we can observe a difference between the transceivers at the +50kHz point – where the interference is sufficiently eliminated by the roofing

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Contents Page TS-480HX TS-480SAT Design Objectives Determination to create a unique transceiverBack to basics The appeal of HF lies in DX’ing Standalone control panel Focus on basic performance200W challenge Overview of the TS-480 Series Adding appeal to fixed station operationsDevelopment Objectives for the TS-480 Series TS-480 concept began with development of the TS-570?Achieving 200W output in a compact transceiver Focusing on HF TX circuits 200W final section CircuitryTX IMD output 200W SPS schematic diagram SPS separate power sources TS-480HX onlyFailsafe device some TS-480HX versions only 100W final sectionAntenna tuner TS-480SAT 200W final section FM circuit FM modulation block diagramRX 1st mixer RX circuitry Front endRX dynamic range RX sensitivity Jumpers for joy Comparison of optional CW filters 500Hz Circuitry after the roofing filterOption installation unit Full compatibility with digital modes data modes Auxiliary FeaturesFeatures useful for 50MHz operations Features useful for mobile operationsNew 5MHz band Features of the Built-in DSP DSP circuitIdeal for mobile operations DNL Demonstrates how ignition noise is reduced by the DNL Noise reductionNR OFF BC OFF Beat cancelRX DSP filters Switching Width During CW operations CW auto tune RX equalizer & TX equalizerTS-480 menus TipsDSP Useful if you want to go on to tune FSK APO Functions that can be assigned to PF keys Assigned Use Split Quick menu Making menus easier to use Menu switchingInternal structure of the main unit Structural FeaturesCooling Cooling diagramUpper side Temperature rise around final transistors Page Design concept New Option Voice Guide & Storage Unit VGS-1 Constant recording functionMessage recording/playback function Voice Guide ResetConfiguration mode for TX output, etc Menu settings Split modeVariable Voice Guide speed Other featuresVFO mode, direct frequency entry Memory channelMain functions KNS addedButton layout & basic operation CW keying Changing memory and registered detailsReading and writing files Compatibility with KNS Kenwood Network Command SystemAccidental continuous TX Setting up KNS on the Arcp sidePage Using a broadband router New Option ARHP-10 Amateur Radio Host Program Freeware Checking LAN settingsUser setup Adjust PC volumePage Network & Operations Problem Solution TroubleshootingCannot get KNS to work Sound Problem Solution Connect a microphone to the computer and bring up TS-480 In-Depth Manual