User Manual
MCA9129-90MCA9129-90-A Installation & Service Manual
Ó Copyright Powerwave Technologies, Inc., July 2001. All rights reserved
044-05060 Rev. C 5-3 July 2001November 2002
just variable attenuator to set amplifier power output on power meter to 90 watts. Measure
IMD on spectrum analyzer. IMD should be -65 dBc max. Record test data in table 5-3.
Switch tested amplifier to OFF.
4. Repeat step 3 for amplifiers 2, 3, and 4, as applicable, for each plug-in amplifier module.
5-5.1.2 Two Amplifier IMD Test
5. Reset and turn on channel 1 and 2 amplifier modules, and turn off channel 3 and 4 amplifi-
ers. Adjust the variable attenuator to set power output on power meter to 180 watts. Meas-
ure IMD on spectrum analyzer. IMD should be -65 dBc maximum. Record test data in table
5-3.
6. Reset and turn on channel 1 and 3 amplifiers, and turn off channel 2. Adjust the variable at-
tenuator to set power output on power meter to 180 watts. Measure IMD on spectrum ana-
lyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
7. Reset and turn on channel 1 and 4 amplifiers and turn off channel 3. Adjust the variable at-
tenuator to set power output on power meter to 180 watts. Measure IMD on spectrum ana-
lyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
8. Reset and turn on channel 2 and 3 amplifiers, and turn off channel 1. Adjust the variable at-
tenuator to set power output on power meter to 180 watts. Measure IMD on spectrum ana-
lyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
9. Reset and turn on channel 2 and 4 amplifiers, and turn off channel 3. Adjust the variable at-
tenuator to set power output on power meter to 180 watts. Measure IMD on spectrum ana-
lyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
10. Reset and turn on channel 3 and 4 amplifiers, and turn off channel 2. Adjust the variable at-
tenuator to set power output on power meter to 180 watts. Measure IMD on spectrum ana-
lyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
5-5.1.3 Three Amplifier IMD Test
11. Reset and turn on channel 1, 2 and 3 amplifiers, and turn off channel 4. Adjust the variable
attenuator to set power output on power meter to 270 watts. Measure IMD on spectrum
analyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
12. Reset and turn on channel 1, 2 and 4 amplifiers, and turn off channel 3. Adjust the variable
attenuator to set power output on power meter to 270 watts. . Measure IMD on spectrum
analyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
13. Reset and turn on channel 1, 3 and 4 amplifiers, and turn off channel 2. Adjust the variable
attenuator to set power output on power meter to 270 watts. Measure IMD on spectrum
analyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
14. Reset and turn on channel 2, 3 and 4 amplifiers, and turn off channel 1. Adjust the variable
attenuator to set power output on power meter to 270 watts. Measure IMD on spectrum
analyzer. IMD should be -65 dBc maximum. Record test data in table 5-3.
5-5.1.4 Four Amplifier IMD And Current Test
15. Reset and turn on channel 1, 2, 3, and 4 amplifiers. Adjust the variable attenuator to set
power output on power meter to 360 watts. Measure IMD on spectrum analyzer. IMD should
be -65 dBc maximum. Record test data in table 5-3.
16. With the power amplifier set at 360 watts power output, use the current probe (magnetic field
type) and measure the dc current flow from the +27 Vdc power source. Current should be
180 144 amps maximum. Record test data in table 5-3.