Hi Charlie,
thanks for your input. Some comments:
50 Ohm/ 75 Ohm
There is an option in the setup to change to 75 Ohm system impedance. Of course, this will not change the hardware of the bridge, but you should see correct values for 75 Ohm system impedance. F-connector is used here as well for 75 Ohm, but just for cable-TV.
HF focus
This is a very good point. There is an ongoing race for higher frequencies. The more GHz the better. But covering multiple GHz conflicts with low cost. The question arrives, if this really should be the focus of such a handheld device. I would agree that most users are HF-users with some limited usage at 2 m and 70 cm. So the main focus is HF. However, an UHF connector is simply too bad. SMA is not robust enough for the field. Leaving BNC or N-type. Let's see.
Batteries
The idea is going towards USB-C, using rechargeable batteries. The European Union just made USB-C mandatory on any mobile device. Therefore, also Apple needed to switch to UCB-C. The USB-C standard defines power delivery on a worldwide base. The voltages and currents are software negotiated. Saying that, you should be able to use just one fast charge USB-C adapter to charge any USB-C device. Ok, I know that power outlets are different in USA and Europe. So you need two.
TDR and transmission line loss without SOL-calibration
Accepted requests, more towards software and available processor power.
73, Michael DG5MK
