
filter – reflects a difference in the manufacturers’ approach to design from the antenna to the 1st mixer.
It is not just the mixer that determines the characteristics of the front end: all of the components between the antenna terminal and the mixer can have an impact.
Despite the compact design of the
With this compact transceiver it was not possible to use a passive tuner equivalent to what is found in
Fig. 9 is a graph demonstrating RX sensitivity. Needless to say, for HF, especially in the low bands, there is more importance attached to multi-signal characteristics than to sensitivity, but obtaining a sufficient level of sensitivity can be vital during mobile operations when one cannot expect much in the way of antenna gain.
As with previous models, sensitivity is set to switch at 21.5MHz with the pre-amp on. However, there is a difference: previously the pre-amp itself was switched, but in the case of the TS-480 this is managed by switching the pre-amp’s NFB gain.
Fig. 9: RX sensitivity
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