Freescale Semiconductor MC13853 LNA, Руководство пользователя

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MC13853 LNA Evaluation Board User’s Guide, Rev. 1.3
Freescale Semiconductor 3-1
Chapter 3
Basic Test Equipment Setup
3.1 Overview
To test and evaluate the performance of the MC13853 LNA on its EVB environment, a test plan and a test
equipment bench set-up in the lab is necessary. A basic test plan can be made by following the MC13853
data sheet and obtaining the same measured parameters. However, the results are dependent on the test
equipment configuration. In order to establish a basic test set-up, the details and equipment
interconnections are given in
Figure 3-1 .
All test equipment used must be calibrated with a valid calibration due date. Also, it is important to perform
an internal instrument calibration of the main items, such as the RF digital signal generator, the spectrum
analyzer and function generator. Since the RF power and its sensors require a separate calibration
procedure, it is very important that this is done before valid data is taken.
Once the test equipment is configured and connected, a bench calibration must be conducted at the
frequencies of interest in order to determine the offset values for the RF power meter and spectrum
analyzer.
The DC and control interconnecting cable harness is detailed in the Appendix A, “DC and Control Wiring
Harness ”. This should be available before the test and evaluation of the MC13853.
There are three test equipment setups required to make all of the measurements. The following steps are
recommended:
1. From the list of test equipment given in Section 3.2, “List of Test Equipment ”, on page 3-3 ,
assemble the line-up as given in Figure 3-1 , Figure 3-2 , and Figure 3-3 .
2. Calibrate each individual instrument first following the manufacturer’s procedure.
3. Calibrate the RF power meter and its sensors at the desired band and frequencies.
4. Conduct a bench calibration at each required frequency. Record all results and enter these as offsets
into the RF power meter and spectrum analyzer.
5. Test the set-up without the evaluation board and verify that the bench calibration is correct by
setting the RF digital signal generator level to 0 dBm at the desired band and frequency.
6. If (5) fails, repeat steps (1) through (4) until measurements are correct.
7. If (5) passes, connect the MC13853 into the circuit.