User's Manual Part 3

Screen Service SDT 501 UB-C ARK 1-T Operations
May, 2010 v 1.0 Page 3 - 65
Click two times the right mouse button on the grid to open the zoom menu. The “H” options are
used to horizontally zoom (x01,x02,x04,x08,x16). The “V” options are used to vertically zoom
(x01,x02,x04).
During the saving actions are created two nonlinear pre-correction files:
• *.dlin files: files containing digital coefficients values for Digital-IF linear pre-correction
curves.
• *.alin files: files containing analog coefficients values for DVB-T Re-modulator linear pre-
correction curves.
The following buttons allow the management of linear pre-correction files and the management
of the connection to port 5000:
• Save: used to save in the device memory the current curves setting. The previously
saved file will be overwritten except in the evet that no files have been saved before; in
this case a dedicated window appears in order to let the user name the new file.
• Save as: used to save in the device memory the current curves setting. The previously
saved file will be overwritten with a new name. in the evet that no files have been saved
before, a new file will be created.
• Read file: used to reload the last saved file.
• Export: used to download pre-correction files on the user PC. A browser window allows
the selection of the saving path.
• Release: release the connection in order to allow others remote machines to connect to
port 5000 (refer to Connection to port 5000 paragraph).
Files are separately managed in analog and in digital AGC mode.
3.5.2 AM/PM
Click on AM/PM button icon, highlighted in the nex figure, to access the pre-correction window.
Figure 16. AM/PM window
Two main actions are possible in this section:
• AM/AM and AM/PM curve drawing: used to change the AM/PM pre-correction
coefficient.
• AM/PM pre-correction files management: used to open or save AM/PM pre-correction
setting file.
AM/AM and AM/PM curves are specific for each power range of each output channel.
The two curves are used to calculate the AM/PM pre-correction coefficients. The curves are
drawn by the interpolation of 1024 points referring to the points inserted and using a linear or
polynomial interpolation algorithm.