I revive this topic that I found very useful for me, hoping that someone is still there to give me some help.
I got for free an Advantest R3132 with TG. Replaced the battery, it "seems" to work but really doesn't, because the trace (and the TG) is shifted about 20MHz toward left and the signal is 5dBm lower than real and noisy. The frequency is not stable and the trace drifts slowly toward left.
The manual self-test (SHIFT/1) says that RF does not pass. I already read the documents above and I am going to do the first test, but I would like to have some help. I am not definitely a RF expert.
I understand that I must do what it follows:
• remove the RF group from the housing (done);
• remove the lid from the RF group, paying attention to the rubber details that risk to fall when you re-move the lid itself (done);
• place the RF group on the table, with no connection (done);
• identify the LO power supply point and solder a small piece of wire to it (identified - see the arrow in the photo - is that point OK?);
• identify a ground point and solder a small piece of wire to it;
• determine the power supply voltage; in my case, there is not the big 39 ohm resistor, so I need to give 6V power supply, not 11;
• connect a suitable 50 ohm spectrum analyzer to the 2nd Local Oscillator monitoring port; I didn’t have such SA, so I am going to use a RACAL DANA 2101 frequency meter (up to 22 GHz) - what do you think?;
• give power supply (6V);
and then proceed as described in the above documents. Did I understand correctly?
Then I have other questions about the VCO centering, but perhaps it is better to proceed by steps.
Thanks for any help…