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112 Chapter 5

Disassembly

A2 Disassembly

This section describes how to disassemble the A2 assembly. Use Table

5-1 below to see which assemblies are replaceable.

NOTE

Periodic Adjustment Intervals

The adjustment programs Periodic Calibration, IQ Calibration, and

Eb/No Calibration should be performed after any assembly referred to

in Table 7-1 on page 159 is replaced, or at least every 24 months. These

program can be run anytime to optimize the performance of the Test

Set. See Chapter 7 , “Periodic Adjustments,” on page 157 for details.

NOTE

Performance Test Intervals

The performance tests in Chapter 8 , “Performance Tests,” on page 173

should be performed when certain assemblies are repaired or replaced,

or at least every 24 months. See Table 3-2 on page 75 for those

assemblies requiring performance testing/calibration.

Module and PC Board Assemblies

1. Remove the Test Set’s external and top internal covers, see

“Removing the External and Internal Covers” on page 104.

2. Remove modules using a flat-blade screwdriver to pry them upward

from the chassis, see Figure 5-8 on page 113.

3. Remove PC board assemblies by lifting them from the chassis (some

assemblies have pull rings) and then disconnect any cables that may

be attached to it. See Figure 5-9 on page 114 for cable connections.

Table 5-1 A2 Assemblies

Module and PC Board Assemblies see page 112

Control Interface Assembly see page 117

PCMCIA Assembly see page 116

RF Input/Output, Upconverter, & Downconverter

Assemblies

see page 118

LO IF/IQ Modulator and CDMA Generator Reference (Gen

Ref) Assemblies

see page 120

see page 122

see page 124

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Agilent Technologies 8935 Series Especificações Página 113