User's Manual

Table Of Contents

G3L-1929- Installation and Service Manual

Section 5. Maintenance

5-1 Introduction

This section contains periodic maintenance and performance test procedures for the G3L-1929-

120 Multi-Carrier Power Amplifier (MCPA).

NOTE

Check your sales order and equipment warranty before attempting to service or re-

pair the unit. Do not break the seals on equipment under warranty or the warranty will

be null and void. Do not return equipment for warranty or repair service until proper

shipping instructions are received from the factory.

5-2 Periodic Maintenance

Periodic maintenance requirements and the intervals at which the tasks should be performed are

listed in table 5-1.

Table 5-1 Periodic Maintenance

Task Interval Action

Inspection:

Cables and Connectors

12 Months Inspect signal and power cables for frayed insulation.

Check RF connectors to ensure that they are tight.

Performance Tests 12 Months Perform annual test per paragraph 5-4.

Clean Fans/Heat Sinks 3 Months

Inspect for debris. Remove dust with a soft cloth/brush

or vacuum cleaner.

5-3 Test Equipment Required For Test

Test equipment required to test the amplifier is listed in table 5-2. Equivalent test equipment may

be substituted for any item, keeping in mind that a thermistor type power meter is required.

NOTE

All RF test equipment required must be calibrated to 0.05 dB resolution. Any devia-

tion from the nominal attenuation must be accounted for and factored into all

output readings.

Table 5-2 Test Equipment Required

Nomenclature Manufacturer Model

Signal Generator H.P. 8656B

20 dB Attenuator, 250 Watt Bird Tenuline

20 dB Attenuator, 20 Watt (2 each) Bird Tenuline

Spectrum Analyzer H.P. 8560E

Coax Directional Coupler H.P. 778D

Power Meter / Sensor H.P. 437B / 8481A

Arbitrary Waveform Generator Sony AWG2021

Network Analyzer H.P. 8753C

044-05138 Rev. A 5-1 May 2003