Hi all,
I am struggling with a problem that has just appeared recently in my Vector Network Analyzer - Labview setup:
I am taking sweeps to read the S parameters with a VNA (Anritsu MS46122B) which is controlled with a Labview program via Ethernet. Everything worked fine until two days ago, when I unattached the VNA from the network. When I plugged everything together, it seems that the VNA is still communicating with the PC (A VISA session is opened through NI MAX), the VNA keeps listening and the .vi modules I use for initialization, configuration of the traces work fine (I can check directly on the VNA screen and no error is obtained in labview).
The problem arises when I try to read the S-parameters (log mag and phase). I specify the channel, the trace to read out, any errors out but in the graph of the front panel of Labview I see nothing. More specifically, empty in magnitude and noise in phase. According to a probe I placed at the outcome of the Read S-parameters module, the corrected parameters being exported are practically zero (orders of magnitude of E-312....).
I have no idea why is this happening or what could I check next, as the program is the same one that worked fine before. My guess is that it has something to do with the VNA - PC path of the retrieved S parameters, but they are clearly shown on the VNA screen and the PC seems to communicate well with the VNA....
I am totally lost, could anyone please give me a hand? I can be more precise if you need me to.
Many thanks in advance.
