Tank's for your responses;
i am trying to integrate the spectran 6065 into a monitoring station to measure the EM field , so i have created my own program using your programer's guide,
So, when i used RBW=FULL,with SPAN=1MHz i found a very good result between -50dBm and 0dBm, but i got -150dBm with the lower power (-80dBm to -60dBm!!!),
tryed to change RBW to a small value and icrease the sweeptime, but i can't measure any thing.
i am using a RF Generator!!!