R3132 Series Spectrum Analyzer Operation Manual
2.3.10 FM Demodulation Function (OPT73)
2-98
CAUTION: To make accurate measurements including calibrations, let the instru-
ment warm up for at least 30 minutes after the power has been turned
on.
7. Press Return, Range, 1 and kHz.
The frequency scale (vertical axis) is set to 1 kHz/.
NOTE: A frequency range of 500 kHz/ or more can be used if an external mixer is
used. In addition, the value of RBW varies according to the frequency range
used. The settable value of RBW for each frequency range is as shown in
Table 2-7.
Table 2-7 Relationship Between Frequency Range and the Value of RBW
8. Press SWEEP, SWP Time AUTO/MNL(MNL), 2, 0, 0 and kHz(msec).
The time scale (horizontal axis) is set to 200 msec.
9. Press TRIG and Ext Trig.
The trigger source is switched to the external trigger.
10. Press BW, VBW AUTO/MNL(MNL), 1 and kHz.
The VBW is set to 1 kHz.
FM deviation measurement
11. Press UTILITY and Deviation.
FM deviation, positive peak deviation, negative peak deviation, and repetition
frequency are displayed in the lower part of the screen. In addition, the display
line is displayed in the center of an FM deviation.
Frequency range
RBW (The value in bold script is set when the frequency
range is switched)
50 MHz/ to 500 kHz/ Cannot be set (displayed as ***)
250 kHz/ to 25 kHz/ 10 MHz and 3 MHz
10 kHz/ to 1 kHz/ 1 MHz, 300 kHz, 100 kHz, 30 kHz and 10 kHz
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