I have a Zed-F9p RTK-2 and can not get a fix. There seems to be no power to the antenna, but pretty sure its turned on in u-center as per pics below. Antenna is a spark fun SPK6618H.
I cant get a voltage from the antenna centre pin to outer.
Have I got a faulty Zed f9? can I put an external voltage supply to the antenna?
Not sure it’s gated on/off by the ZED
It comes from VRF via a 10R resistor and an inductor, probably 27nH
Check the inductor hasn’t blown like a fuse, check the voltage on the east side of the 10R.
Check you don’t have a short in the cable.
Check you can power the antenna with a bench supply, shouldn’t pull more than 10-15mA at
3.3V
Alternatively you could get a Bias-Tee with a DC block, and inject a voltage to the antenna via that.
Any choice of bias-Tee, Lots out there and electronics is not my strong suite just yet, but I am working on it?
And then some SMA to TNC adapters, or whatever you need to mix-n-match your cable, etc.
Thanks heaps Clive, I have ordered some parts, wont be here until end of Jan though.
Will update when I have tried it out.
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Apart from having a dry solder joint on the Bias Tree, I now have corrections.
I guess the zed f9 is faulty.
Was it purchased from us? If so head over to Returns (contact vendor if purchased elsewhere) and we’ll get ya squared away
All good thanks, just a prototype so will do what I need it to do, next one will need to work though…