Simple SA in ADC range 192k (-96k to +96k) around Center frequency
(Offset frequency disabled for measure input)
Connect generator to CH1 input and set 30.050MHz output
On nanoVNA set:
Center freq 30MHz
Span 192k (it just for markers)
Disable all traces except 1
Format Logmag
Ref level 0
Scale 15
No mirror suppresion!! No level calibration!!
Just for Proof of Concept
For persinal use (no any sources):