Ceyear 4041 Series, User Manual

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Chapter XI Performance Characteristics Test
138
Fig 11-1 Test of frequency range
1) As the dashed-line connected test device shown in Fig 11-1, spectrum analyzer 4041 (hereinafter referred to as
the spectrum analyzer) provides the reference frequency for the synthesized signal generator1464C of which the
low-frequency output is connected to the RF input of the spectrum analyzer (as shown in dotted line of Fig 11-1).
2) Set the synthesized signal generator as follows:
【
Freq
】
[Low Frequency Generator Setting] [Frequency
Setting] 9 kHz, [Amplitude Setting] -10 dBm, [Back], [Low Frequency Output On/Off].
3) Set the spectrum analyzer as follows: center frequency: 9 kHz, span: 1 kHz, reference level: 0 dBm, RBW 10
Hz; other items are set automatically. When the Peak key on the spectrum analyzer is pressed down, the marker
shall indicate to the maximum signal response, the marked amplitude value is free of significant fluctuation, and
the signal is clearly distinguishable. The center frequency value at this time is the lower limit measurement value
of frequency range. Compare this value with the corresponding value in the Performance Test Record Table of
4041 Series Spectrum Analyzer (hereinafter referred to as "4041 Series Spectrum Analyzer Record Sheet"), and
mark "
√
" for the consistent result and "×" for the non-consistent result.
4) As shown in the solid line in Fig 11-1, connect the RF output of synthesized signal generator1464C to the RF
input of spectrum analyzer with the adapter and cable. Set the output frequency of signal generator to the highest
frequency of corresponding model of spectrum analyzer. Turn off the modulation function and set the output
power at -10 dBm.
5) Set the spectrum analyzer as follows: center frequency: maximum value of corresponding model, span: 1 kHz,
reference level: 0 dBm, RBW 10 Hz; other items are set automatically. When the Peak key on the spectrum
analyzer is pressed down, the marker shall indicate to the maximum signal response, the marked amplitude value
is free of significant fluctuation, and the signal is clearly distinguishable. The center frequency value at this time is
the upper limit measurement value of frequency range. Compare this value with the corresponding value in the
Performance Test Record table of 4041 Series Spectrum Analyzer (hereinafter referred to as "4041 Series
Spectrum Analyzer Record Sheet"), and mark "
√
" for the consistent result and "×" for the non-consistent result.
11.2 Frequency readout accuracy
Description: Frequency accuracy is used to characterize the closeness of the frequency measurement value of
spectrum analyzer to the corresponding true value. The frequency measurement value of spectrum analyzer during
the sweep is affected by the factors such as the reference frequency, span, RBW, etc. Test the frequency readout
BNC cable
Synthesized
signal generator
Adapter
10MHz IN
2.4mm cable
Adapter
Adapter
10 MHz output
Spectrum
Analyzer