8 Technical indicators and testing methods
8.5 Performance characteristics test
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Fig. 8.15 Schematic diagram of the residual response test
c) Test procedure
1) Connect a 50
load to the RF input port of the device to be tested according to Fig. 8.15.
2) Reset the device to be tested. Set the device to be tested to fixed frequency reception mode (FFM).
Set the center frequency 20MHz, the frequency width 20MHz, the reference level -70dBm, the resolution
bandwidth 12.5kHz.
3) Observe for false response signals exceeding -90dBm. If available, record the frequency value and
power value in the auxiliary table B.15.
4) Set the center frequency in steps of 20MHz and repeat step 3 until the upper frequency limit of the
device to be tested is covered. During the test, if the background noise of the device to be tested is close
to -100dBm, the resolution bandwidth measurement of the device to be tested can be reduced.
d) Recording and data processing
Collect the test data, record the maximum power value in the auxiliary table B.13 as the residual
response value and record it in the functional performance test record table A.1.
8.5.1.16 Panoramic scan speed
a) Description of the test items
Panoramic scan speed refers to the continuous band width of the device in the panoramic scan state,
under the specified frequency resolution, to complete the scan search in unit time.
b) Test diagram and test instruments and equipment
Synthetic Signal Generator ........................................... Recommend 1464/E8257D
Fig. 8.16 Schematic diagram of the panoramic scan speed test
c) Test procedure
1) Connect the instrument according to Figure 8.16. Synthetic signal generator and the device to be
tested share a common time base.
2) Reset the device to be measured; set the scan mode to panoramic scan (PSCAN), start frequency
10MHz, end frequency 8GHz, resolution 100kHz, measurement time 500us, window type select IF
panoramic and RF panoramic, attenuation off, maximum hold display on; run panoramic scan.
3) Set the scanning mode of the synthesized signal generator as "Frequency", the scanning type as
"List", the repetition mode as "Single", and conFig. the frequency points of the list scanning as 20MHz,
60MHz, 120MHz, 240MHz, 500MHz, 700MHz, 1GHz, 1.2GHz, 1.6GHz, 2GHz, 2.5GHz, 3GHz, 3.5GHz,
4GHz, 4.5GHz. 60MHz, 120MHz, 240MHz, 500MHz, 700MHz, 1GHz, 1.2GHz, 1.6GHz, 2GHz, 2.5GHz,
