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500MHz, thus CENTER could be set to 400MHz, and SPAN set to 200MHz.
Use START, STOP option to spcify 300-500MHz also works.
(2) Since it's from neighbourhood, the signal tends to be strong. Lower the
sensitivity by pressing LEV button and set REF to -10dBm or higher.
(3) Use marker function if manual observation is scheduled to find the
emission frequency. Press MODU into marker menu, press M1 to activate
marker M1 and enter its setting. Press MORE, select AUTO Peaking. Then
press BACK button to return to M1's function menu.
(4) Put a finger on TO RECEIVER option and observe the curve. It can be
seen that the marker is finding the peak automatically in real-time.
(5) Attributing to the close distance, the emissive source of interest tends
to be very strong, reaching -30dBm with a distance of tens of meters. Within
such a distance, a signal that is detectable for a cymometer typically reaches
stronger than -20dBm. Press TO RECEIVER button immediately as soon as
such a strong narrow-band signal appears in the spectrum, to set the
frequency to receiver. Next, observe the spectrum on the receiver, fine tune
the frequency to centralize that signal. Lastly, adjust the settings of the
receiver to demodulate that signal.
(6) To log strong signals over a period of time, use PEAK TABLE function.
Its entrance locates on mode main menu. Press ON/OFF after entering to
enable this function, and the list could be seen. Whenever manual observation
is preferred, select HIDDEN button to temporarily hide this table, whose log
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