Full Outdoor 2+0 XPIC IP Link
Page 21 of 39
Version
1.0
•
Auto Mute Remote Radio - Allows auto mute of remote radio if possible (this function requires syn-
chronization with remote side)
•
Delay status – A remaining delay time countdown
SPECTRUM ANALYSER OUTPUT
The spectrum analyser output frame. It displays the analyser results collected since last device reboot.
4.5.3
Diagram
This section provides actual spectrum and constellation diagrams of all channels.
SPECTRUM: A simplified Rx spectrum plot.
CONSTELLATION DIAGRAM: A representation of a signal modulated by the digital modulation schemes.
Two-dimensional scatter diagram in the complex plane a T symbol sampling instants. Measured constella-
tion diagram can be used to recognize the type of interference and distortion in a signal.
•
gaussian noise is displayed as fuzzy constellation points
•
non-coherent single frequency interference is displayed as circular constellation points
•
phase noise is displayed as rotationally spreading constellation points
•
amplitude compression causes points located in the corner to move towards the centre
4.5.4
ACM
The Hitless Adaptive modulation (ACM) settings. This page is divided in two separate sections:
ACM SETTINGS
•
ACM function
◦
auto pX – ACM enabled. The Rx modulation will be automatically adjusted according to the given
ACM profile settings
◦
man pX – ACM disabled. The Rx modulation will be fixed to the modulation specified by the
Max
RxACM Profile
settings on the
Radio/Parameters
page
•
ACM Offset – The MSE offset off the pre-set
thrLo
and
thrHi
constants (see below)
ACM PROFILE SETTINGS
The list of possible Rx modulations with their switching thresholds which will be used by the ACM in ac-
cordance with the selected profile.
•
ACM_nr – designation of the modulation
•
en – enables a modulation for ACM switching
•
mod/fec – bandwidth/forward error correction level
•
spd – maximal throughput
•
thrLo – MSE threshold for switching to lower Rx modulation
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