I have a VNA and want to measure the impedance looking into my PCB.
My VNA is pretty old, it's a 8753ES.
My PCB includes a commercial Nordic or Dialog MCU with Bluetooth Low Energy (BLE). The path from the MCU includes bond wires, multiple transmission lines and parasitic components. I've analyzed what I expect the impedance to be using a Smith chart.
The path between the MCU and the antenna has been split and I can plug my VNA into the PCB or the antenna. The total distance from this location to the MCU < lambda/10. It's a single pin antenna.
Can I use a VNA to measure the impedance of the MCU?
If I put the MCU into constant transmit mode (as I have to?) then can I only match at one frequency? (BLE band is 2400MHz to 2480MHz)
Am I going to break my VNA if I plug a constant TX device into it?
I currently don't have the calibration tool and it costs $6K... For this exercise what is the consequence of no calibration? Can I make my own coarse calibrator?
To measure, connect the VNA to my split and simply look at the Smith chart? Only using one connector on the VNA. Can I look at the impedance radar (time domain response) to identify the effect of bond wires etc, or is the radar not straightforward?
Thanks so much!