OK, to help things along a bit I attach the block diagram that I created when looking at an R3132. I forgot that the user manual did not contain such, I had to do the work myself to get a feel for how teh R3132 was configured and the various L.O and I.F. frequencies.
I can't find the original file for the moment (its somewhere on one of my laptops) I hope the picture is readable.
For info, the important details are:
1st L.O. (YIG Oscillator) range is 4261MHz to 7261MHz
1st I.F. is 4261MHz
2nd L.O. is 3840MHz (this has the dielectric trimmer and is phase locked to 3840MHz)
2nd I.F. is 421Mhz
Note the monitoring ports from couplers in the 1st and 2nd L.O signal paths. Useful for quick checks. The 2nd L.O. monitoring port is a pig to get at as it is on the side of the RF module. I used a fine wire in the SMA socket to create an aerial that I could monitor with another spectrum analyser and EMC probe. It worked a treat as the level on the port is pretty high. The 1st L.O monitoring port is on the rear of the RF module. There are two ports, one for an optional TG and the other for monitoring. Either will do for monitoring the frequency of the YIG Oscillator but you need equipment capable of working at those GHz frequencies. I used an 8GHz SA that I borrowed from work.
Also check that the CAL output is the correct frequency.
Enjoy
Aurora