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Fig. 4-1 Schematic Diagram of Connection of Signal Generator and Spectrum Analyzer
b) Reset the spectrum analyzer into the default state:
Press [Reset].
c) Enable the channel power measurement function:
Press [Measure], [Channel Power] and [Channel Power Off On]. Thus the channel power measurement function is
enabled.
d) Set the center frequency:
Press [Measure], [Channel Power] and [Center Freq] to set the center frequency with number keys. Set the center
frequency of the spectrum analyzer as the frequency of the tested signal, i.e. 1GHz.
e) Set the channel power bandwidth:
Press [Measure], [Channel Power] and [Channel BW] and set the channel power bandwidth as 1MHz with number
keys.
f) Set the channel power span:
Press [Measure], [Channel Power] and [Span] and set the channel power sweeping bandwidth as 2MHz with
number keys.
g) Set the resolution bandwidth and video bandwidth of the spectrum analyzer:
Press [BW] and [RBW Auto Man], and set the resolution bandwidth as 30kHz;
Press [BW] and [VBW Auto Man], and set the video bandwidth as 30kHz or less.
The channel power bandwidth refers to the frequency width of the power displayed by the spectrum analyzer within the bandwidth, while the channel
power span refers to the sweeping frequency range of the spectrum analyzer. The channel power span should be more than or equal to the channel power
bandwidth; otherwise, the channel bandwidth will be automatically set to be equal to the channel power span. The ratio of the channel power span to
channel power bandwidth is a constant. When the channel power span changes, this ratio will remain unchanged. It can be changed by changing the
channel power bandwidth. For example, when the channel power span is doubled, the channel power bandwidth will be increased by the same times.
h) Enable the average function:
Press [BW] and [Average Off On], set the averaging times as 16, and enable the average function.
