Modulated RF Satellite Test Software
As telecoms payloads become more complex test-ing using a CW signal is no longer possible. This system, developed by a UK space company pro-vides the capability not only to provide the more tra-ditional bent pipe payload testing such as group de-lay, frequency response and spurious but also broadband measurements and functional tests. Va-dis provided the software engineering to develop the over test software architecture along with the indi-vidual test code modules.
Developed in LabVIEW using Actor Framework this architecture provides an extremely flexible solution. Communication to the overall test conductor is provided via a TCPIP link which in turn controls the payload configuration and test selection. Each test inherits from a base test class providing good reuse of common functionality.
- S-parameters (VNA)
- Frequency Response (VNA)
- Group Delay (VNA)
- Phase Noise (SA)
- Spurious (SA)
- EVM (Error Vector Magnitude)
- NPR (Noise Power Ratio)
|EVM and NPR measurements taken with a wideband ARB source
and Keysight Vector Signal Analyser software suite using a spectrum
analyser as the hardware front end.
- BERT (Bit Error Rate Test)
|BERT measurements using Rohde & Schwarz BTC to provide the
DVB_S2 HD TV source with the return signal demodulated using a
modified Rohde & Schwarz AVG050 satellite receiver with the output
stream passed back through to the BTC for BERT calculations.