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3.6.3
Description of Function of Other Keys
SIGNAL
The rotary control is used to increase or decrease
the signal level in the selected step size.
MASK
The rotary control is used to increase or decrease
the masking level in the selected step size.
(The MASK key must be selected.)
SINE
Selects a pure tone as the test signal; the indica-
tor above the key illuminates green.
WARBLE
Selects a frequency modulated tone as the test
signal, the indicator above the key iluminates
green.
SPEECH
Selects speech mode, the indicator above the key
illuminates green; refer to Appendix 1 for details
(note that initially, only Softkeys 1 & 3 have a
function).
MASK
Switches on masking at 30dBHL - narrow band
(for pure tones) or speech-weighted masking;
the indicators above the key and to the right of
the display illuminate green; for speech mode
use Softkey 4 to select INT for internally genera-
ted noise or EXT (with Softkey 1 used to select
LINE) to route recorded noise via the Line In
connection
LEFT
Press once to select the left ear, the indicator
above the key illuminates green.
RIGHT
Press once to select the right ear, the indicator
above the key illuminates green.