User's Manual

Trango Systems, Inc. StrataPro 24 Quick Start Guide 19
operation of each link on a non overlapping frequency pair may be advised. The
StrataPro 24 allows custom TX and RX center frequency to help with co-location.
The system can support user selectable channel sizes of 10, 30, 60, 75, 100, or 120 MHz.
Recommended settings for each channel size are shown in Appendix 1
Advanced Adaptive Coding and Modulation (AACM)
Advanced Adaptive Coding and Modulation provides error-free hitless changing of the
modulation level for a fixed channel width to allow the link to be maintained during
weather related fading, interference, or other channel degradation that leads to poor
signal quality. Instead of the link dropping and no traffic passing, the link will be
maintained with a lower capacity until the channel degradation is removed, at which
time the link will return to the normal modulation level.
The transitions between modulation levels are controlled by pre-set MSE thresholds and
each transition is made without dropping packets since both ends of the link coordinate
the transition automatically. The available modulation levels are 4096 QAM, 2048 QAM,
1024 QAM, 512 QAM, 256 QAM, 128 QAM, 64 QAM, 32 QAM, 16 QAM, and QPSK.
The user can set both a maximum and minimum modulation level which the radio will
operate within. Both sides of the link should have the same min and max modulation
levels for proper operation. Typically it is best to always use QPSK as the minimum
modulation level to maintain the link during deep fading.
GPS Coordinates
Allows entering/saving the GPS Coordinates manually to assist in plotting the endpoints
of each link on third party management software link SNMP managers and Google
Earth/Maps. The coordinates must be entered by the user manually.
Spectrum
This feature allows the user to check for interference by displaying what the modem is
receiving at it’s input. The spectrum is shown relative to the current receive channel
and any interference will be displayed. Use of this feature does not affect traffic over
the link. This feature does not show the actual RF spectrum, but rather the filtered
spectrum that is being used by the modem. It is used to diagnose interference only.
Link Management
The StrataPro 24 can be managed through the following methods:
Graphical User Interface (GUI):