23
PULSE
Enables pulse tone present function, the
indicator above the key illuminates green.
INVERSE
Presents the signal continuously, the indicator
above the key illuminates green. Pressing the
PRESENT key interrupts the signal presented.
+20dB
This enables tone levels to be presented with up
to 20dB higher output; press the key and then
use SIGNAL rotary control to access the extra
20dB; a green indicator above the key is used to
show that the function is active, and an additio-
nal display message indicates levels greater than
100dBHL.
Important Note:
This function will not operate if continuous tone presentation
has been enabled.
LOCK
Synchronous masking function. Locks signal and
mask output at a constant difference when the
SIGNAL control is adjusted. An indicator above
the key illuminates green when active. The MASK
rotary control adjusts masking independently.
AIR
Outputs the signal to the earphones; the
indicator above the key illuminates green.
BONE
Outputs the signal to the bone vibrator; the
indicator above the key illuminates green.