Vox -01 Operating Manual page 33

Microphone pre-amp settings (left) and power saving settings (right)
The internal microphone amplifier of the VOX-01 features an adjustable gain setting. Adjust
Adjustment of the pre-amp gain is hardly ever necessary, since the system has a very wide
(linear) dynamic range of 130 dB. However, if you wish to connect an external signal source
which operates at lower signal levels than the VOX-01 microphone, you can choose adjust
the pre-amp gain by (approximately) +20 dB. Note that this value of +20 dB is not exact;
recalibration will be needed. With the standard microphone, this setting should be 0 dB.
You can also set the backlight to automatically switch off if the touch screen has not been
touched for a while. This time-out can be set between 30 seconds and 30 minutes, or the
backlight can be set to never turn off at all.
The backlight time-out option saves a considerable amount of battery pow-
er. But keep in mind that it will cause the screen to black out without turning
the device off. Don't forget to turn the device off when you finish working
with the device; the fact that the screen is dark does not necessarily mean
that the device is turned off. If the LED next to the USB port burns, then
the device is still turned on. To turn the backlight back on again if a back-
light time-out has occurred, press the power button. The touch screen will
not respond to presses while the backlight is turned off, but measurements
will continue to run whether the backlight is on or off.
VOX-01 Operating Manual
33