-I've got a minicircuits [ZDC-20-3]() 20dB directional coupler that I picked up
+I've got a minicircuits [ZDC-20-3](notes/Characterising_a_coupler/ZDC-20-3.pdf) 20dB directional coupler that I picked up
cheap at a rally. I'm interested to see how it matches up to the spec.
| [[!img notes/Characterising_a_coupler/coupler_sch.png size=300x300]] |
the nearest point from the spec.
I've no hope of measuring insertion loss to 0.3dB, so lets look at directivity
-and coupling instead. Tools available are an FT817, and my W7ZOI [powermeter]().
+and coupling instead. Tools available are an FT817, and my W7ZOI [powermeter](notes/W7ZOI_Power_Meter).
To get a low power signal source I've set the rig to low power, and I'm
using the tune tone from wsjt-x and adjusting the audio drive to control
[[!img notes/Characterising_a_coupler/IMG_20180930_203828.jpg size=300x300]]
-[ZDC-20-3]: Characterising_a_coupler/ZDC-20-3.pdf
-[powermeter]: W7ZOI_Power_Meter
-
-[[!tag draft radio]]
+[[!tag radio]]