Comparison of two similar systems 3dB attenuator
29th May 2018
14 MHz (twodays run time) 28-29 May 2018
WSPRlite 1 G33CWI (attenuator 3dB SMA-JK6G-3dB)
WSPRlite 2 G34CWI
Freq split = 7 Hz
WSPRlites synchronised - only simultaneous data used
Minicircuits splitter ZFSC-2-4
Antenna doublet
Samples
-5dB = 1
-4dB = 3
-3dB = 9
-2dB = 19
-1dB = 48
0dB = 114
1dB = 315
2dB = 634
3dB = 595
4dB = 229
5dB = 134
6dB = 57
7dB = 28
8dB = 14
9dB = 3
10dB = 3
11dB = 1
WSPRlite power matching typically +/- 0.3 dB
Splitter matching +/- 0.3dB
WSPRlite 1 connected to port 1
WSPRlite 2 connected to port 2
Note: as the distribution is not normal, linear regression is the most appropriate analysis method.