Thanks Ron,
I reckoned that if the manufacturer wrote the maximum limit on the front of the analyser that was what it would cope with. I'm running about half that power.
I've got a home made attenuator attached to my home made 8W dummy load which is about 38.7 dB attenuation, I'll give that a go.
Well you may have a point, using my home made attenuator puts the second harmonic at about -52 dB.That's relative to the primary that's about -2.5dBm
My home made dummy load consists of 4x 2W 50R thick film SMD resistors, then a 2k2 through hole resistor with the output across 2x100R SMD resistors.? My NanoVNA suggests that it's quite linear. I wouldn't trust it for absolute power measurements but maybe it's better for relative power.
dBc? Ah, relative to carrier.
Must look for more attenuators at the next radio boot sale...
Thanks,
Chris, G5CTH
