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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.