Installation Note N5222-90131 55
Description of the Upgrade
Installation Procedure for the Upgrade
Install the Flexible Cables Required for Upgrading to an Option 420
PNA
The gray flexible cables were installed in previous steps. To see additional
images showing the location of these cables, click either of the Chapter 6
bookmarks “Bottom RF Cables, 4-Port, Option 420, S/N Prefixes ≥6021” in the
PDF Service Guide
1
. New parts are listed in Table 2 on page 11.
Install the Semirigid Cables Required for Upgrading to an Option 420
PNA
To see images showing the location of these cables, click the Chapter 6
bookmark “Bottom RF Cables, 4-Port, Option 420, S/N Prefixes ≥6021” in the
PDF Service Guide
1
. See also, Figure 33-1 on page 60, Figure 34 on page 61,
Figure 35 on page 62, and Figure 36 on page 63. New parts are listed in Table
2 on page 11.
For W26 and W166, refer to Figure 34 on page 61.
—
①– W26 (N5222-20034) A32 port 2 coupler to front-panel Port 2 CPLR
ARM
—
➁— W166 (N5222-20118) A31 port 4 test port coupler to A73 port 4 Bias
combiner
For W22, W80, W91, W165, and W168, refer to Figure 35 on page 62.
—
①– W91 (N5222-20022) Port 4 RCVR D IN to A44 port 4 receiver
attenuator
—
➁— W165 (N5222-20122) Port 4 CPLR THRU to A73 port 4 Bias combiner
—
➂— W168 (N5222-20116) A32 port 2 test coupler to A74 port 2 Bias
combiner
Flexible cables N5242-60019, N5242-60020, N5242-60021,
N5242-60022, N5242-60023, and N5242-60024, were installed previously
in “Step 29. Install the *NEW* A11 (x4) Direct Digital Synthesizer (DDS)
Assembly and Cables” on page 44, “Step 30. Connect New Cables to A20
IF Multiplexer (IF MUX) Board” on page 48, “Step 32. Install the New Mixer
Brick (MXB) Cables and Route Cables” on page 49.
1. See “Downloading the Online PNA Service Guide” on page 8.
Use a 5/16” wrench to hold cable connectors when tightening a mating
semi-rigid cable.
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