© 2001 – Ericsson Amplifier Technologies Inc.
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5.2.1 Cleaning Air Inlets/Outlets
The air inlets and outlets are located at the front and rear of the unit. Air is drawn in
from the front, and exhausted through the fans at the rear of the MCPA. These areas
should be cleaned at 30 day intervals, or sooner, if the equipment is operated in a
severe dust environment. Use dry, low-pressure compressed air, or a brush with soft
bristles to loosen, remove and clean off any accumulated dust from the fans and the air
inlet and outlet areas.
5.2.2 Test Equipment Required
Table 5 lists the test equipment required for evaluating MCPA performance. Suitable
equivalents may be substituted.
Table 5. Test Equipment Required
NOMENCLATURE
QTY
MANUFACTURER
MODEL
Signal Generator
1
H/P
ESG
Attenuator, 40 dB, 250 Watt
1
Weinschel
S3-40-43
Attenuator, 20 dB, 20 Watt
2
Weinschel
AT20
Spectrum Analyzer
1
H/P
8560E
Directional Coupler, 30 dB
1
RF Power
DDC-901-931-R5-30
Power Meter/Sensor
1
H/P
437B/8481A
Power Supply
1
H/P
6673A
5.2.3 Performance Tests
Performance tests should be performed at 12-month intervals, or as directed by the
resident maintenance authority, to ensure that the MCPA is functioning properly and
within expected specification limits.
