HP 8920A Application Handbook page 80

FM Transmitters
To set Ref Level:
•
•
11 Tune Center Freq in 1 MHz steps anywhere from 400 kHz to 1 GHz in
search of harmonics, sub-harmonics, multiples, or spurious emissions.
NOTE: If spurious emissions are suspect, un-key the Transmitter, and verify that
emissions are from the transmitter and not another source.
To measure spurious emission of the transmitter under test:
•
•
78
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
From the Marker screen, select Marker To Peak
Select Marker To Ref Level
Place at center frequency.
Or perform the following:
a Select Main from the Controls field.
b Select Markers from the Choices field.
c Position the marker on the desired peak. (Position or Next Peak)
Marker frequency and level are displayed as shown.
SPECTRUM ANALYZER
BW= 3 kHz
Marker
Freq MHz
101.12980 Spurious or Harmonic
Level & Frequency
Lvl
dBm
-99.92