INTEGRA-X User Manual
FUNCTIONAL DESCRIPTION
SAF Tehnika JSC
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chains introduce certain nonlinearity and this causes an error which decreases MSE. To maintain
acceptable linearity with high power Integra-X features pre-correction algorithm for IF signal
(ADPD – Adaptive Digital Pre-Distortion), which ensures increased output power.
Adaptive equalizer
The Integra-X features an adaptive equalizer, which is a filter that automatically adapts to time-
varying properties of a communication channel with selective fading, having a target to
compensate the inequalities in frequency response, mitigating the effects of multipath
propagation or interference. From the equalizer graph
) you can find input signal spectrum distortions In Integra-X, using QAM modulation this
filter equalizes not only a separate quadrature channel but provides cancellation of cross-
interference between polarizations.
In Integra-X, the adaptive equalizer is realized as a complex-arithmetic 40-taps digital FIR (Finite
Impulse Response) filter. In other words, the equalizer is a selective frequency amplifier and
attenuator, a device, which in application to IF (Intermediate Frequency) band-limited signal is
schematically shown in the picture below:
Figure 5-2 Adaptive equalizer
FTP directory
FTP directory of Integra-X can be used in combination with CLI commands to backup/restore
system configuration, upload another FW version, upload the new license file.
FTP directory is separated area of internal memory in Integra-X.
FTP directory function is deactivated by every restart of Integra-X and all files from this special
area are wiped out.
Use CLI command system service ftp enable to activate FTP directory function.
After system service ftp is enabled it is possible to connect to Integra-X by using your favorite FTP
client. Username is anonymous and password is empty.
Here is an example of an FTP connection to Integra-X using FileZilla:
Figure 5-3 FileZilla connected to Integra-X FTP