Many friends are confused about the differences between these two machines. As a humble individual (unlike the great masters who hide in the mountains), I will provide a simple explanation.
Let's not discuss the differences in appearance or operation... Instead, let's focus on the fundamental difference: the receiving scheme. The FT710 uses a direct sampling method based on SDR (such as the IC7300), while the DX10 uses a mixed SDR approach (like the DX101).
What are the differences?
The design schemes for direct sampling SDR and mixed SDR differ in their implementation at the receiver stage.
Direct sampling directly digitizes the RF signal, with all signal processing performed by software.
The combination of an SDR (Software-Defined Radio) increases the traditional analog front-end and mixer, which is why the DX10 has a 9MHz intermediate frequency.
Advantages and Disadvantages: Direct sampling SDR, relatively simple hardware, capable of covering a wide frequency range, from tens of MHz to GHz, similar to commercially available SDR receivers.
Hybrid SDR, due to the addition of a mixer, is more complex in terms of hardware and cannot achieve a very wide frequency range. However (and this is important), the dynamic range of a hybrid SDR can be made very large, theoretically and practically similar to traditional machines.
What does "receiving dynamic" mean?
In simple terms, it refers to the largest and smallest signals within the receiving range that appear simultaneously in the spectrum.
A key component of an SDR receiver is the ADC sampling. There's a situation called signal overflow (IC7300 method for handling signal overflow, which can reduce RF gain, thereby reducing receiver sensitivity).
Signal interference can significantly affect reception performance, such as causing crosstalk and other issues.
Hybrid SDRs, due to their design with analog front-ends, do not experience signal overflow issues.
The biggest difference between a mixed SDR and a direct-sampling SDR lies in this aspect:
A mixed SDR does not experience signal overflow, and it does not require reducing RF gain under any condition. Reducing RF gain also means losing sensitivity.
In a highly complex electromagnetic environment, software-defined radios (SDRs) offer significant advantages in terms of reception performance. (Investing in SDRs is definitely worthwhile.)
Hybrid SDR represents the cutting edge in shortwave receiving technology, and its future innovations are unknown.
Differences in usage:
The electromagnetic environment is good, and the background noise is very low. Direct sampling of SDR can fully utilize its receiving performance, with parameters such as those provided by the manufacturer -120dBm or higher, which makes little difference.
When your environment has a lot of noise and interference, and you need to reduce the RF gain to prevent ADC overflow, then small signals may not be received.
If you're not someone who demands perfection and prioritizes the absolute best receiving experience, and if you don't care about remote calls from DX stations, then there is no difference.
I hope this helps you choose the right radio!
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