Ceyear 3943B, Руководство по эксплуатации

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8 Technical indicators and testing methods
8.5 Performance characteristics test
120
3GHz, 3.5GHz, 4GHz, 4.5GHz, 5GHz, 5.5GHz, 6GHz, 6.5GHz, 7GHz, 7.5GHz, 7.9 GHz total 22 points,
output power -30dBm, dwell time T 0 is 3.9s, start single scan.
4) After the end of a single scan, observe whether the device under test can display all burst signals,
use the maximum hold frequency scale to measure the frequency and magnitude of all burst signals to
meet the level error less than 5dB and frequency error less than 1 resolution bandwidth.
5) If the requirements of step 4) cannot be met, adjust the dwell time T
0
and repeat the process from 3)
to 4) until the requirements are met, and the dwell time T
0
will be recorded in the auxiliary table B.16.
d) Test record and data processing
Calculate the scan speed according to the following formula and record the test results in the
Functional Performance Test Record Table A.1.
0
起始频率 终止频率
扫描速度
T


......................
（
9
）
8.5.1.17 Magnitude accuracy
a) Description of the test items
This test verifies the accuracy of the magnitude measurement of the input signal in the operating
frequency range of the device to be tested.
b) Test diagram and test instruments and equipment
Synthetic Signal Generator ........................................ Recommend E8257D/1464
Power Meters ................................................ Recommend 2436/E4419
Power Probes .............................................. Recommend AV71710/9304A
Power Divider ................................................ Recommend 11667C
Fig. 8.17 Schematic diagram of the magnitude measurement accuracy test
c) Test procedure
1) Connect the test instrument as shown in Fig. 8.17, synthesize the signal generator and the common
time base of the device to be tested. The signal output of the synthesized signal generator is input to the
device to be measured and the power meter respectively after power division.
2) Set the output signal frequency and power of the synthesized signal generator according to the
auxiliary table B.17.
3) Reset the device to be tested and set the scan mode to fixed frequency reception (FFM) with a
frequency width of 100 kHz. Set the center frequency and attenuator status according to auxiliary table