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G0HZU_JMR · 20th Feb 2018, 2:39 pm

Mine was at its best when measuring the loss of short RF cables or RF filters because if you know the mV/dB slope of the detector and the input VSWR of the detector and the RF source is low you can measure insertion loss quite accurately. Again, you do need to make sure the source has low harmonics. Even -40dBc harmonics can begin to affect a critical measurement like this if you use an AD8307 based sensor.

20th Feb 2018, 2:39 pm	#13
G0HZU_JMR Dekatron Join Date: Sep 2010 Location: Cheltenham, Gloucestershire, UK. Posts: 3,077	Re: W7ZOI power meter (AD8307 based) Mine was at its best when measuring the loss of short RF cables or RF filters because if you know the mV/dB slope of the detector and the input VSWR of the detector and the RF source is low you can measure insertion loss quite accurately. Again, you do need to make sure the source has low harmonics. Even -40dBc harmonics can begin to affect a critical measurement like this if you use an AD8307 based sensor. __________________ Regards, Jeremy G0HZU