MIL-STD-1605A(SH)
FIGURE 2. Sensing HYDRA or similar RF sensor for unintentional emissions.
c. Test equipment set-up. Set the test equipment utilized for test so the scanning receiver utilized has the
same or greater sensitivity as the system under test, with the span of the scanning receiver set to no greater than (200 x RBW), set for peak detection mode, and sweep time as indicated in table I. Video filtering shall not be used to bandwidth limit the receiver response. If a controlled VBW is available on the measurement receiver, it shall be set to its greatest value. The use of Low Noise Amplifiers (LNA) is acceptable to obtain the required dynamic range of test receiver utilized. Change equipment settings as necessary to enhance test equipment selectivity in such a
manner that it will improve the ability to resolve the source of potential interfering signals from unintentional emissions. Record data for both the new test configuration, as well as the initial test configuration. The use of 'Peak Hold' on the test equipment ensures collection of transient signals and ensures a more thorough analysis. Save the data for analysis and classification.
d. Analysis of data. Analyze and classify the data collected.
(1) Analyze data for indications of unintentional emissions.
(a) When an interfering signal is detected during testing, indicate in the Phase I data sheets whether a system filter or coupler would remove the detected interfering signal.
(b) Harmonic emissions and emissions at specific frequencies shall be noted for classification.
7
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business