Ceyear 4051 Series, User Manual

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8. Specifications and test methods
8.5 Performance characteristics test
670
2434/N1914A is recommended for the power meter.
N8487A/71712/R&sZ61 is recommended for the power sensor.
c) Test steps
1) Zero and calibrate the power meter. Connect the tested instrument according to solid lines in Fig. 8.11 and
connect the output of the signal generator to the power meter. Reset the 4051 analyzer and complete all
calibrations without prompted error messages.
Fig. 8.11 Schematic diagram of overall absolute amplitude accuracy test
2) Set the output frequency of the synthesized signal generator as 500 MHz and the amplitude as -20 dBm.
3) Set the power meter frequency as 500 MHz and record the power meter reading in the column L1 of the
4051 Auxiliary Form.
4) Change the connections in the test according to dotted lines in Fig. 8.11 to connect the cable via the
adapter to the 4051 analyzer.
5) Set the 4051 analyzer as follows:
Center frequency: 500MHz
Span: 0Hz
Resolution bandwidth: 300kHz
Video bandwidth: 30kHz
6) Execute Peak Search and record the 4051 marker reading L2 in B9 of the 4051 Auxiliary Form.
d) Test records and data processing
7) Calculate 500 MHz absolute amplitude accuracy ΔA500 of the frequency point according to the formula
(18) and record the result in the 4051 Record Sheet:
Where L
1
r efers to the power meter reading (dBm);
L
2
refers to the marker reading of the 4051 analyzer (dBm).
8) Calculate with the test result indicated in Section8.5.1.2.3 for each band according to the formula (19) and
record the calculation result as the overall absolute amplitude accuracy ΔALL in the 4051 Record Sheet: