sat-nms CSM Communication System Monitoring

The Communication Cystem Monitoring (CSM) Module for the sat-nms network management software enables the operator easily to monitor the signal spectrum of defined satellite-links or -channels by means of a spectrum analyzer and to program a measurement sequence that verifies the levels of defined channels with cyclic measurements in the background. The CSM module can be integrated into a sat-nms network management system or operated as a stand alone program.

The CSM System measures signal levels and signal/noise ratios by analyzing the spectrum measurements of one or several spectrum analyzers. Multiple channels will be measured within one spectrum analyzer sweep.

With software controlled RF switches or the sat-nms L-Band Switch in front of the spectrum analyzer, different antennas or frequency and polarization bands can be measured in one sequence. A big advantage of the L-Band Input Switch compared to RF switches is the long loss-free switching life. For more details read the datasheet LSW.

With the measurement results, the software calculates downlink result values, taking into account the spectrum analyzers resolution bandwidth, the channel bandwidth and calibration values stored in the system configuration. These results are:

• C/N0: Ratio between average noise densities of the channel and noise reference measurement
• C/N: C/N0 value multiplied with the channel bandwidth
• EIRP: The satellite EIRP is estimated by multiplying the channel's average noise density with its bandwidth and then applying a calibration factor.

Features

• Support for multiple Spectrum Analyzers
• Multiple Channels per analyzer
• User-friendly graphical interface
• Access to recent spectrum plots without interrupting the measurements
• Channel History Chart displaying the stored channel levels
• Client-Server based architecture with unlimited number of clients

Applications

• VSAT-Hub
• Teleport