Ceyear 4041 Series, Руководство пользователя

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Chapter XI Performance Characteristics Test
171
Fig 11-18 Input Port Voltage Standing Wave Ratio Test
1) Set the frequency range and source output power of the vector network analyzer as appropriate and select
VSWR display mode.
2) Carry out the single port measurement calibration (including open circuit, short circuit and load calibration)
of the vector network analyzer at the end of the calibration cable.
3) After the calibration, remove the calibration kit from the end of the calibration cable and connect it to the RF
input port of the spectrum analyzer, as shown in Fig 11-18.
4) Press
【
Preset
】
on the spectrum analyzer, wait for restart and enter the Spectrum Analyzer measurement
interface.
5) Read the maximum voltage standing wave ratio (VSWR) on the vector network analyzer with marker
functions.
6) Record the test result in the corresponding test item of the 4041 Series Spectrum Analyzer Record Sheet .
11.19 Maximum fail-safe input level
After 4041 spectrum analyzer is powered on and normally started, set
【
Ampt
】
[Ref Level] to +30 dBm. If the
reference level displayed by the instrument is +30 dBm, there is no error message and the reference level
displayed on the left side of the spectrum analyzer is +30 dBm, it means that the maximum fail-safe input level of
the spectrum analyzer is normal.
This performance test is guaranteed by the design of RF front-end microwave parts in the spectrum analyzer.
11.20 Displayed scale
After 4041 spectrum analyzer is powered on and normally started, set
【
Ampt
】
[Scale Type Logarithm Linearity],
and manually set the requirements of
“
0.1~10 dB per division, 0.1 dB step per division (10-division display)
”
.
【
Ampt
】
[Scale Type Logarithm Linearity] display range is 10 divisions. The
【
Ampt
】
[Amplitude unit] can
provide 11 scale units including dBm, dBW, dBV, dBmV, dBμV, dBA, dBmA, dBμA, Volts, Watts. It means that
the displayed scale of the spectrum analyzer is normal.
11.21 Video BW
After the 4041 series spectrum analyzer is powered on and normally started, set the resolution BW to 10 MHz,
and press
【 ↓ 】
. In case of every change of the resolution BW, the corresponding BW will be deemed to be
automatically changed once. In addition, it will have an automatic coupling with the resolution BW, with the
Network analyzer
Spectrum
Analyzer
2.4mm calibration
cable