A good thing in my mind! The link in the OP was in Japanese for me.
Here is another one in English
JRC NRD-383 Announces a new SDR receiver
I seeing a price tag of only $50,000
That seems cheap enough!!!
JRC is back!!!! with NRD-383: Radio Listening Overseas
Quote from link above:
JRC NRD-383
HF digital receiver NRD-383 is, digital directly received RF signal
The barrel conversion, was realized by software processing of all, shortwave reception
Shin is a machine. Carried out by an external PC control, LAN (1000BASE-T)
Remote control by is possible.
It can be recorded in up to 10MHz band RF signal received
Various signal analysis is possible.
Adopt (1) direct sampling method
The digital conversion directly received RF signal, Zeng all processing
Implemented in software.
Equipped with a receiving section (2) of the two systems
Wideband input suitable for wideband signal monitoring, detailed solution
Equipped with a receiving part of 2CH of narrowband input suitable for analysis.
The realization (3) high sensitivity and high dynamic range
Configuration of the AMP circuit, distortion of each element element, the filter circuit, etc.
Review the characteristics and achieve low noise and high dynamic range.
Equipped with (4) Digital IQ baseband signal output
Equipped with a digital IQ data output of up to 10MHz width, each
Possible species waveform analysis.
(5) a 19-inch rack built-in support
The mounting base for mounting to a 19-inch rack receiver body
And available as an option, and a wide range of equipment request.