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2. R-S-T system - Wikipedia

   en.wikipedia.org/wiki/R-S-T_system

   The S stands for "Strength". Strength is an assessment of how powerful the received signal is at the receiving location. Although an accurate signal strength meter can determine a quantitative value for signal strength, in practice this portion of the RST code is a qualitative assessment, often made based on the S meter of the radio receiver at the location of signal reception.

3. Ham test - Wikipedia

   en.wikipedia.org/wiki/Ham_test

   The Ham test is a blood test used in the diagnosis of paroxysmal nocturnal hemoglobinuria (PNH). Patient red blood cells (RBCs) are placed in mild acid; a positive result (increased RBC fragility) indicates PNH or congenital dyserythropoietic anemia. [1] [2] This is now an obsolete test for diagnosing PNH due to its low sensitivity and ...

4. Signal strength and readability report - Wikipedia

   en.wikipedia.org/wiki/Signal_strength_and...

   The Amateur radio R-S-T system signal report format currently in use was first developed in 1934. [citation needed] As early as 1943, the U.S and UK military published the first guidance that included the modern "Weak but readable", "Strong but distorted", and "Loud and clear" phrases. [citation needed]

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6. Sucrose lysis test - Wikipedia

   en.wikipedia.org/wiki/Sucrose_lysis_test

   The sucrose hemolysis test was developed in the 1960s. [2] Hartmann and Jenkins first described the test in 1966. [3] [4] The test was devised as a superior screen for PNH compared to the Ham's acid hemolysis test (HT) that was developed in the 1930s. [2] For decades, these two tests were the primary methods of diagnosing PNH. [2]

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8. WSPR (amateur radio software) - Wikipedia

   en.wikipedia.org/wiki/WSPR_(amateur_radio_software)

   The program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands. WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station's callsign, Maidenhead grid locator, and transmitter power in dBm.

9. Two-tone testing - Wikipedia

   en.wikipedia.org/wiki/Two-tone_testing

   The combined test signal can be injected directly in to the receiver if the antenna is removable. A second directional coupler, connected in the conventional configuration, can be used to provide a feed of the input to a spectrum analyser. This allows confirmation that the input signal is free of intermodulation products.