Natus Quantum Amplifier
User & Service Manual
78
15.1. Problems with Signal Quality
If there is a missing or bad signal, first try swapping cables to the Breakout Box. If you are still
experiencing problems, try running a channel test.
Run a Channel Test
1. On the montage settings toolbar, set
LFF
to 0.1 Hz.
2. Choose
Controls
->
Channel Test
. The Channel Test control bar appears above the waveform
display.
3. Point to the first menu on the Channel Test control bar and click
Sine
or
Square
. The Sine wave
setting is good for general use. A low-frequency Square wave setting can reveal problems in the
integrator of the DC removal stages on the Analog Board.
4. Adjust the waveform frequency and amplitude on the Channel Test control bar as required.
The Channel Test signal is applied to the first amplifier stage; therefore, it tests the amplifiers and ADCs
but cannot check the connection to the front panel connector.
