User's Manual
Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD 8VSB ATSC Modulator
ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 2 38
The processor compares the captured data to the ideal waveform curves (stored on the
capture card) and calculates NLP or LP coefficients. The coefficients are then transferred
to the modulator board for control of the back-end Non-linear or Linear Digital Pre-
corrector. A number of signal measurements, including MER, Peak to Average Ratio,
Upper Shoulder, Lower Shoulder and Group Delay are also transferred to the modulator
board and are displayed by the modulator interfaces (Web GUI, CLI).
Web GUI Interface
Introduction
The modulator parameters can be reviewed or changed using the Web GUI interface.
The Web GUI is an intuitive interface allowing the user to access the current modulator
status and set up the operational parameters. The Web GUI interface uses a simple
hierarchical menu structure which provides access to the modulator parameters though
a series of pull down menus.
The modulator needs to be assigned an IP address in order to access the Web GUI. The
modulator is shipped from the factory with a default IP address, but the user will need to
configure the IP address of each unit for local network access. The IP address can be
accessed and modified from the front panel or CLI.
Login
• Open a Web browser window (Internet Explorer, Firefox, etc.) and enter the
modulator IP address. For example: http://172.20.30.210/.
• The first menu page is the login page.
• The User Name field must be kept blank, while the default password for normal
access is “admin”
Figure 5: 8-VSB Modulator Login Page