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64
Direct-co
nnected
non-cabl
Power probe
Adapter
Power Meter
increase its frequency with the step of 500MHz, and repeat steps 4) - 6);
7) Take the maximum and minimum readings of the power meter in steps 4) - 6) as the range of
the port output power, and fill in the corresponding column of the test log sheet with the result.
5
Power level accuracy
Description:
It is to test the difference between the measured value and the actually set value of the
port output power meter when the port output power of the microwave analyzer is set to -15dBm. The
smaller the difference, the higher the power level accuracy.
a)
Testing equipment
Power meter...........................................................................................................................ML2437A
Power probe.......................................................................................................................... MA2445D
One 2.4mm(f)-3.5mm(f) adapter and one 3.5mm(f)-N(m) adapter
b)
Testing steps
Microwave analyzer
Figure 4-14 Test block diagram of power level accuracy
1) Connect the power meter ML2437A with the power probe MA2445D for zero calibration, as
shown in Figure 4-14, and connect Port 1 of S5105 series microwave analyzer to the power
probe through the adapter;
2) Set the S5105 Analyzer to work in network analysis mode, the test port to Port 1, the
output power level to -15dBm, and the point frequency to 100MHz;
3) Set the calibration factor frequency of the power meter to be the same as the output frequency
of the microwave analyzer;
4) Read the test value of the power meter, calculate the amplitude accuracy index (-15 - power
meter reading), and record the result in corresponding column of the test form;
5) Change the test frequency based on the test log sheet, and repeat steps 2) - 4) until all tests
are completed.
6
Effective direction
Description:
The direction is defined as the ratio of the power that occurs at the auxiliary end of a signal
when it travels in the positive direction to the power that occurs at the auxiliary end of a signal when it
travels in the reverse direction, expressed in dB. It shows how well a directional device can separate the
positive and reverse traveling waves. The larger the value of the directional index is, the better its ability
to separate signals is. Ideally it is infinite.
It is to test the directional index of Port 1 and Port 2 after calibration and error correction in the test mode
of antenna.
a)
Test block diagram and test instrument and equipment
Test block diagram is shown in Figure 4-15:
