
Hi all,
what would the port ratings be on the NanoVNA-V2?
I mean the max x VDC and y dBm RF you see on the yellow stickers on instrument ports.
Looking at the schematics one could assume that the 10uF capacitors after the SMA connectors on both ports are 35V rated or lower? If so, how low?
Port 1 goes directly to a RF input on a RF switch which specifies absolute max to 28dBm.
Port 2 has a pi attenuator of 0402 resistors before the antenna input of a RF switch. What are the power rating on 0402 resistors? I guess 1/16W ie, around 18dBm but first resistor does not take it all so I guess a bit higher, 20 dBm? The max rating of the RF switch antenna input is not specified in the datasheet but it ha the same P1db point as the other RF ports so can we assume 28dBm here as well?
So 10VDC and 20dBm RF for both ports?
Best regards
Marcus