Telecommunications – Receiver or analog modulated signal frequency converter – Measuring or testing of receiver
Patent
1997-03-24
2000-08-29
Vo, Nguyen
Telecommunications
Receiver or analog modulated signal frequency converter
Measuring or testing of receiver
455 671, H04B 100
Patent
active
061120677
ABSTRACT:
A radio communication analyzer can test a radio device under test which corresponds to one of a plurality of types of digital communication systems in accordance with the digital communication system to which the radio device under test corresponds. The radio communication analyzer includes a modulation section, a demodulation section, a modulation/demodulation processing section, and a control section. The modulation section has a first rewritable memory, and converts modulation data indicating the contents of a first test signal to be transmitted to the radio device under test into a digital modulated signal by executing a program written in the first memory. The demodulation section has a second rewritable memory, and generates demodulated data from a second test signal received from the radio device under test by executing a program written in the second memory. The modulation/demodulation processing section has a third memory. The modulation/demodulation processing section generates data to be input to the modulation section and processes the demodulated data obtained by the demodulation section on the basis of a protocol for the digital communication system used by the radio device under test by executing a program written in the third memory. The control section reads out program data corresponding to the respective types of digital communication systems and stored in a storage unit and writes the program data in the first, second, and third memories.
REFERENCES:
patent: 5566088 (1996-10-01), Herscher et al.
patent: 5706202 (1998-01-01), Itahara et al.
patent: 5765025 (1998-06-01), Morimoto et al.
Lin et al. Coplanar Waveguide Bandpass Filter, IEE Transactions on Microwave Theory, Jul. 1995.
Akada Mamoru
Honma Yuji
Okada Tomohisa
Saito Takayuki
Seike Takashi
Anritsu Corporation
Aoki Makoto
Vo Nguyen
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