7-3 Example FM Demodulation Measurement AM/FM/PM Analyzer (Option 509)
7-4 PN: 10580-00349 Rev. H Spectrum Analyzer MG
7-3 Example FM Demodulation Measurement
1. Press the Setup main menu key and then press the Demod Type submenu key to toggle
the setting to FM. The active setting is underlined on the submenu key face.
2. Press the Auto IFBW submenu key to set the IFBW (IF Bandwidth) frequency
automatically. The active setting is underlined on the submenu key face.
3. Press the IFBW submenu key to set the value manually. Doing so will automatically
turn Off the Auto_IFBW function. The available values for IFBW are: 1 kHz, 3 kHz,
10 kHz, 30 kHz, 100 kHz, and 300 kHz.
4. Press the Freq main menu key to set the center frequency, the span, the signal
standard, or the channel.
5. Press the Amplitude main menu key to set the scale or the power offset. From the
RF Amplitude menu, you can also press the Adjust Range submenu key.
6. Press the Measurements main menu key to choose the desired type of measurement.
7. From the Measurements menu, press the RF Spectrum submenu key to view the signal
spectrum. Press the submenu key again to set specific signal measurement functions.
a. Press the Occ BW Method submenu key to select the preferred method of
presenting the occupied bandwidth, either by percent of the total received signal
power or by an amount better than the dBc that is set with the dBc submenu key.
b. Use the other two submenu keys as needed for signal presentation.
8. Press the Audio Spectrum submenu key to view the spectrum of the demodulated audio.
Press the submenu key again to set the span for the audio spectrum or the squelch
level. Note that RF signals below the squelch level will cause the audio spectrum to be a
flat line in the center of the screen.
In this view, you can see the 19 kHz stereo pilot tone as well as other subcarriers.
Figure 7-1. Audio Spectrum
ООО "Техэнком" Контрольно-измерительные приборы и оборудование www.tehencom.com
To Next Page
Loading...
Need help?
General
