User`s guide

Chapter 4 Using the Microcal Diagnostic Utility 95
About Adjusting the Frequency
Depending on the current operating environment, the touchscreen may
receive interference from the monitor. This interference prevents the
system from receiving clear, quality signals when you touch the screen.
As a result, you may notice some performance problems when moving
the cursor or drawing lines.
To obtain a clear signal, use the Noise Check option to adjust the
frequency level. The range of frequency levels and the default level
depends on your touchscreen controller.
Before you modify the operating frequency of the touchscreen
controller, familiarize yourself with Noise Check and frequency
adjustment considerations.
Accessing the Noise Check Option
You access the Noise Check option from different locations,
depending on your touchscreen controller.
Noise Check might be located on the Main menu.
Noise Check might be located on the Diagnostics menu.
There are two noise check programs available. The noise check
program opened by Microcal depends on the type of touchscreen
controller you are using.
This manual refers to the noise check programs as Automatic
Frequency Adjust and Manual Frequency Adjust. Instructions for
using these two programs follow this section. Determine which noise
check program your controller uses, and consult the appropriate
instructions.
To determine which noise check program your controller uses, select
the Noise Check option and look at the first screen.