What exactly are you going to do with tracking generator?
Frequency range of 1.5GHz covers ... all sorts of radio, 315 MHz 465 and 918 MHz industrial (remotes, garage door openers) and 900/800MHz GSM bands.
Unfortunately that EXCLUDES 2.4 GHz (WiFi, Bluetooth etc.), 1800 GSM and many other things in terms of RF. Also I am not sure if -80 dBc/Hz is Phase Noise is good enough, but DSA800 is definitely practical and useful Spectrum Analyser.
There are no "deals" only COMPROMISES