NAT-MCH Users Manual Version 1.16

NAT-MCH – Users Manual
10 Clock Module Configuration
The clock module mounted on the NAT-MCH can be configured via a text based script file,
similar to the configuration file used for the Ethernet switch on the NAT-MCH.
The different functions of the clock module can be set by using so called “configuration
items”. Each configuration item consist of a identifier and one or more parameters. The
following example shows the configuration item “clk_type” which can be used to assign a
specific clock type (e.g. 2.048 MHz) to one of the output clocks.
clk_type = 1, 3
As shown above the configuration item identifier is always separated from the parameter list
by a equals sign (‘=’). The parameters are always separated by a comma sign.
Comments within the configuration begin with a hash character (‘#’), like:
#
# Item : clock type configuration
#
The current clock module configuration can be downloaded from the NAT-MCH e.g. by
using the “Backup Settings” function in the web based configuration interface (refer to
chapter 9). The generated text file can be changed with a standard text editor and can be used
as a starting point for a user defined configuration. The changed configuration can be
uploaded again, e.g. via the web based configuration interface.
The clock module configuration can also be stored in the onboard FLASH memory, e.g. by
using the “Save current configuration to onboard FLASH memory” function in the web based
configuration interface. This can be used to load the configuration for the clock module
during startup of the NAT-MCH. Note that loading the clock module configuration from
FLASH has to be enabled via the MCH configuration (refer to chapter 5.4.6).
The following chapters describe the configuration items the can be used to configure the clock
module. For more information about the functionality provided by the clock module please
refer to the latest Clock-Module Technical Reference Manual.
Version 1.16 © N.A.T. GmbH 57