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7. ARROW KEYS: are used for the various selections provided on the menu pages.
8. SIGNAL: manual start of re ex tests is enabled (via CH1) and, once the function is
enabled, manual pressure can be reset (via CH2).
9. FREQUENCY: keys enable selection of the signal frequency sent to the transducers.
10. IPSI: this key is used to select the probe as a transducer for the transmission of stimuli
during stapedial re ex detection tests.
11. CONTRA: this key is used to select the contralateral transducer for the transmission of
stimuli during stapedial re ex detection tests.
12. SIDE: key enables selection of right or left.
13. START/STOP: this key enables start/stop of some of the test options.
14. PRINT: if pressed from the main selection page, this key enables printing of all
the tests performed (via thermal printer, or by creating a pdf report), otherwise
printout of a single test is possible if the key is pressed directly from the test page
(with printout via the built-in thermal printer).