Calian Carrier Under Carrier Software

The Carrier-Under-Carrier (CUC) software license is an advanced analysis option for the Decimator D4. It is designed to detect, demodulate, and visualize interfering signals hidden beneath a primary carrier, a scenario common in satellite communications where unintentional or malicious carriers overlap in frequency.

Technical Features

Carrier Demodulation

• Performs demodulation of samples from the expected carrier (reference signal).
• Extracts and displays characteristics of the demodulated signal, including constellation, power, and error metrics.

Residual Spectrum Analysis

• After subtracting the main carrier, the software plots the residual trace, where interfering carriers (hidden or overlapping) may be visible.
• This allows operators to detect interference that would otherwise be masked by the dominant carrier.

Supported Standards / Carrier Type

• IESS (Intelsat Earth Station Standards): 308, 309, 310, 314.
• DVB Standards: DVB-SNG, DVB-S, DVB-S2.

Supported Modulation Types

• BPSK, QPSK, OQPSK
• 8PSK, 8/16QAM
• 16/32APSK
• 64QAM

Licensing Model

• Each Decimator D4 unit requires its own CUC license (licensed per device, not site-wide).

Compatibility

• Supported on Decimator D4 Spectrum Analyzers (PCIe, Portable, and Multi-Port models) with demodulation capability.
• Requires the device to already support DVB-S/S2/S2X demodulation functions.
• Installed via the Decimator’s license management system (license file upload).