| 摘要 |
<p>An optically coupled signal measuring system for antenna received signals is based on a modulating process. The antenna signal is amplified (11) and processed by a transmitter (13) with two filter stages (15, 16) with demodulators (17, 18) coupled to A/D converters (19, 20). A temp. signal from the antema amplifier is also converted (23) and the signals multiplexed (24) through a modular (25). An LED (26) transmits to a photodiode (30) coupled to amplifier (31), demultiplexer (32), D/A converters (34-36) and signal displays (37-39).</p> |
