The receiver front end (local oscillator) is usually located at the base of the test positioner with the mixer connected directly to the test antenna port. This configuration requires only a single RF path through the positioner greatly simplifying system design.
NSI-MI Technologies is a leading supplier of test and measurement instruments, products, systems and software for all near-field and far-field configurations.
Central to all NSI-MI Technologies test and measurement systems is the Data Acquisition and Measurement System and optional software packages for acquisition, planar, cylindrical or spherical analysis.
Indoor Far-field Systems
An indoor far-field anechoic chamber has the same basic design criteria as an outdoor range except that the surfaces of the room are covered with RF absorbing material. Testing indoors offers many advantages to conventional outdoor ranges including improved security, avoiding unwanted surveillance and improved productivity due to less time lost because of weather and other environmentally related factors.
Outdoor Far-field Systems
In an outdoor far-field range configuration, the test antenna is installed on the test positioner located on a tower, roof or platform outside the instrumentation control room. The receiver front end (Local Oscillator) is usually located at the base of the test positioner, with the mixer connected directly to the test antenna port. This configuration requires only a single RF path through the positioner, greatly simplifying system design.