Ceyear 4041 Series, User Manual

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Chapter IV Spectrum Analyzer Mode
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video trigger. The scan will be triggered as long as the positive ramp portion of the input trigger signal passes the
video trigger level set by the [Slope Rising Falling] command. When the trigger mode is set to external trigger,
the scan and measurement will be synchronized with the next voltage cycle.
Limit
The limit function is intended to monitor the signals in a certain frequency band. Since the spectrum analyzer is
designed with upper and lower limit lines and allows the user to set the limit by himself, it will give an audible
alarm signal in case the amplitude of any signal in a certain frequency band goes above the set upper limit line or
below the set lower limit line.
Field strength measurement
The spectrum analyzer has the field strength measurement function and relevant soft menus, such as [Field
Strength Off On], [Recall Antenna], [Edit Antenna] and [Save Antenna], which can be used to perform field
strength test quickly with the cooperation of corresponding test antenna.
Carrier-to-noise ratio
The carrier-to-noise ratio function is intended to measure the ratio of carrier power to noise power, and contains
carrier bandwidth, noise bandwidth, offset frequency, span, carrier power, noise power, carrier-to-noise ratio and
other parameters.
Emission mask
The emission mask function is intended to recall the limit line as a mask to measure whether the signal power is
limited by the mask. The mask parameter is a limit line, and is assigned by recalling the limit line. The mask can
move up and down and side to side according to the center frequency and reference power. The mask always
moves the center point of limit line side to side to the center frequency, and moves the center point up and down to
the reference power according to the calculated reference power. The reference power is divided into peak power
and channel power, and which power is to be selected is determined by the type of reference power.
IQ capture
The IQ capture function is intended to capture IQ data and store it in the instrument according to capture time,
sample rate, capture mode and other parameters set by the user.
Tune & Listen
The spectrum analyzer has the audio demodulation function and can be used to monitor the stations. The effects of
the demodulated sound can be improved by adjusting the resolution bandwidth and will be the best when the
resolution bandwidth is set between 300~30 kHz in demodulation mode.