Anritsu FAQs
Our Anritsu 37347C VNA is getting the following error messages: 6024 PHS LCK FAIL DE and 5110 RF PWR UNLEVELED. If I disable port 1 the errors go away.
It is apparent that something has failed in the down converter of the signal source of your VNA. If you look at the block diagrams for your VNA, you will see that the VNA has only one internal signal source that is used for S parameter measurements. This signal source is a 2 - 20 GHz YIG oscillator that is used direct with filters for frequencies above 2 GHz. Below 2 GHz, this source is down converted with a fixed frequency oscillator, filtered and amplified. It is this down converter assembly that has apparently failed in your VNA based on the symptoms you described. There is no capability to substitute an alternative source to make S parameter measurements. The best course of action is to send your VNA to an Anritsu service center for repair.
