Hi Jim,
THANK YOU! I also have a Rig Expert AA-600. If I sweep at the shack, I get a 2:1 bandwidth that is far wider, than if I sweep at the antenna feedpoint.
Why does the nano not show this same effect? What am I missing?
Is it because the calibration the nano provides, removes the effects of the feedline, while the AA-600 does not, because it does not have a calibration option?
73, and thanks,
Dave (NK7Z)
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
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On 9/19/21 9:38 AM, Jim Lux wrote:
On 9/19/21 9:23 AM, Dave (NK7Z) wrote:
If you sweep with your calibration plane at the antenna, and at the VNA, I would like to see those results...
73, and thanks,
Dave (NK7Z)
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
Here's an example of a 6BTV with 100 ft of RG-8X.
Blue trace is cal at the NanoVNA
Orange trace is cal at the end of the Coax.
You can pretty clearly see the loss of the coax increasing with frequency.
Also attached is a plot of the measurement of two 100 ft cables, (new and old) with the cal at the NanoVNA end, and the far end of the coax just open.
