Measurement Capabilities¶

The Newtec EL470 has no testing capabilities since it was not intended for protocol testing. However, it can output a ACM log containing the modulation and coding scheme for a given transition. This is information is stored in a .csv file similar to the following:

Timestamp,Demod,RqModCod,EsNo,CarrierBitrate
2014-11-20 16:15:17,1,16APSK-9/10,28.06,6304
2014-11-20 16:15:21,1,16APSK-9/10,28.05,8877
2014-11-20 16:15:25,1,16APSK-9/10,27.01,8877
2014-11-20 16:15:29,1,16APSK-9/10,27.06,5836
2014-11-20 16:15:33,1,16APSK-9/10,27.24,5836
2014-11-20 16:15:34,1,16APSK-9/10,27.09,5836
2014-11-20 16:15:35,1,16APSK-8/9,27.21,5836
2014-11-20 16:15:35,1,16APSK-9/10,27.05,5836
2014-11-20 16:15:36,1,16APSK-9/10,27.25,5836
2014-11-20 16:15:37,1,16APSK-5/6,27.19,5836
2014-11-20 16:15:38,1,16APSK-8/9,27.11,4250
2014-11-20 16:15:39,1,16APSK-5/6,27.22,4250

From this log we can extract the following information:

• Timestamp (in seconds)
• Modcod parameter (modulation + coding rate)
• Estimate of E _s / N ₀
• Information bitrate (in bps)

This is done by a parser (EL470_LogParser_ACM.m) in Matlab which also does some nice plots.