Three runs with a VBW/RBW ratio of 0.01, total run time about four minutes. HP E4421B at 1296.200 MHz 0dBm into HP8652A using KE5FX PN. Brings out the 50kHz interval spurs very nicely. Now I need to find if they are from the 4421 or the 8652!
Machining and Ham Radio experimentation from VLF to SHF