Powerwave Technologies Inc. 5JS0059 Manuale Utente

044-xxxxx Rev. x

5-2

Table 5-2.  Test Equipment Required

Signal Generator

Agilent (H.P.)

ESG4433B

30 dB Attenuator, 250 Watt

Tenuline

Spectrum Analyzer

H.P.

8562E

Coax Directional Coupler

H.P.

778D

Power Meter / Sensor

H.P.

437B / 8481A

Network Analyzer

H.P.

8753D

Current Probe
Source Diskette

Powerwave

Driver PA (1930-1990 MHz)

12 dB gain, P

1dB

 = 29 dBm (min)

5-4.  PERFORMANCE TEST
Performance testing should be conducted every 12 months to ensure that the amplifier system
meets the operational specifications listed in table 5-3.  Also verify system performance after any
amplifier module is replaced in the field.  The test equipment required to perform the testing is
listed in table 5-2, and the test setup is shown in figure 5-1.

5-4.1. AMPLIFIER PERFORMANCE TEST.
To perform the test, proceed as follows:

1.

Connect test equipment as shown in figure 5-1.

NOTE

Do not apply any RF signals at this time.

AMPLIFIER SPURIOUS EMISSIONS TEST:

2.

Load the MFRM waveform on the ESG (signal generator). Apply this signal through a
driver amplifier to the MCPA so that the RF signal going into the MCPA is approximately 0
dBm (adjust the input RF signal level to get 47 dBm output power).  Measure spurious
emissions. Verify that it is within specification.

GAIN TEST:

3.

Set input power level to power amplifier at 0 dBm (1932, 1960, and 1987 MHz).

4.  Measure the output power in dBm.

5.  Subtract input power (in dBm) from output power (in dBm) to get gain.

6.

Check the amplifier gain across the band from 1930 MHz to 1990 MHz.  Gain should be
47 

±

2 dB.  Record test data in table 5-3.

INPUT RETURN LOSS TEST:

7.

Read and record the S

11 

return loss measurement on network analyzer.  Record test data

in table 5-3.