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20 Chapter 1
Making Basic Measurements
Resolving Small Signals Hidden by Large Signals
5. Set the 300 MHz signal to the reference level by pressing Mkr → and
then
Mkr → Ref Lvl.
If a 10 kHz filter with a typical shape factor of 15:1 is used, the filter
will have a bandwidth of 150 kHz at the 60 dB point. The
half-bandwidth (75 kHz) is narrower than the frequency separation,
so the input signals will be resolved. See Figure 1-10.
Figure 1-10 Signal Resolution with a 10 kHz Resolution Bandwidth
6. Place a marker on the smaller signal by pressing Marker, Delta,
Peak Search, Next Pk Right. Refer to Figure 1-11.
Figure 1-11 Signal Resolution with a 10 kHz Resolution Bandwidth