User Manual

MCA9129-90MCA9129-90-A Installation & Service Manual

044-05060 Rev. C 5-4 July 2001November 2002

5-5.1.5 Harmonics Test

17. With the power amplifier set at 360 watts power output, use the spectrum analyzer and check

the frequency band from 869 MHz to 894 MHz for harmonics. Harmonics should be -50 dBc

maximum. Record test data in table 5-3.

5-5.1.6 Spurious Test

18. With the power amplifier set at 360 watts power output, use the spectrum analyzer and check

the frequency band from 869 MHz to 894 MHz for spurious signals. Spurious signals should

be -65 dBc maximum. Record test data in table 5-3.

5-5.1.7 Gain Test

19. Disconnect spectrum analyzer from test setup, and connect the network analyzer.

20. Set network analyzer as follows:

A. Power output to -

–4 -12 dBm.

B. Frequency start to 869 MHz.

C. Frequency stop to 894 MHz.

D. Normalize the network analyzer for gain and return loss.

21. Reset and turn on the channel 1 amplifier, turn off channel 2, 3 and 4 amplifiers. Check the

gain across the band from 869 MHz to 894 MHz. Gain should be as specified in table 1-2 ±1

dB. Record test data in table 5-3.

22. Turn off the channel 1 amplifier and reset and turn on the channel 2 amplifier. Check the

gain across the band from 869 MHz to 894 MHz. Gain should be as specified in table 1-2 ±1

dB. Record test data in table 5-3.

23. Repeat steps 21 and 22 and individually check and record the gain of each amplifier module

in the system. Record test data in table 5-3.

24. Refer to table 5-3. Collectively reset and turn on the amplifier modules in groups of two three

and four, as shown in table 5-3, and check the gain of each group. The minimum/maximum

gain of each group of amplifiers should be within the limits shown in table 5-3. Record test

data in table 5-3.

5-5.1.8 Input Return Loss Test

25. Reset and turn on all amplifier modules in the main frame. Read and record the S

return

loss measurement on network analyzer. Record test data in table 5-3.