888/24 I/O
22
Using a VU meter
If you don't have a sine wave generator or
another way to send a 1 kHz tone into the
888/24 I/O at 0 VU, a second alternative is
to measure the output level of the
888/24 I/O with a VU meter, such as the
kind found on a professional-quality mix-
ing console. To do this, be sure that the
outputs of the 888/24 I/O are connected to
the VU meters of the console or other de-
vice. (On most consoles these inputs are
usually the tape returns, or possibly the
line inputs.)
To calibrate the 888/24 I/O with Calibration
Tool using an external VU meter:
1
In the Calibration Tool software, select 1
kHz from the Frequency pop-up menu and
click the oscillator setting to On.
2
Adjust the 888/24 I/O Output Level trim
pots with a Phillips screwdriver to align the
outputs to read “0 VU” on your console's
meters.
3
After you have done this, connect each
output of the 888/24 I/O directly to its in-
put: Connect Channel 1 Output to
Channel 1 Input, and so on for each chan-
nel.
4
To align the inputs, select 888/24 I/O 1
Channel 1 from the Channel pop-up
menu. Adjust the 888/24 I/O Input Level
trim pot with the screwdriver until the on-
screen meter reaches “0 VU”. This input is
now aligned.
5
Repeat this procedure for each input.
