I'm starting this topic because I have bought 2 Advantest R3273 Analyzers on ebay.
Both with different defects.
So far I have been able to replace the step attenuator and got the signal path below 3GHz working.
There was a defect bias circuit for the first mixer which put DC voltage in the first stage and degraded the signal greatly.
Since I also had to replace the mainboard all the cal data is incorrect.
This is not a problem for the range <3.5GHz because the inbuilt cal puts everything back in order.
However for frequncies above 3.5Ghz they go through a different frontend (YTF -> YIG tuned filter) and this is not calibrated with the built in cal function but has to be calibrated thorugh service menu.
Sadly I'm missing the cal manual and the password for the service menu.
I have extracted the firmware / OS which is on a CF card but so far haven't been able to find the password anywhere.
The image can be found here:
good_spectrum.imgAlso I'm not sure what architecture the CPU is.
I've taken pictures.
http://imgur.com/a/gGEWsMaybe someone on the forum is able to point me in the right direction.
Regards