Installation Note N5222-90131 53
Description of the Upgrade
Installation Procedure for the Upgrade
Step 35. Connect/Reconnect A71–A74 Bias-Tee Combiner’s Cables
to A70 Low Frequency Extension (LFE) Board and the Other Ends of
the New Cables Connected to the IF Multiplier (IF MUX) Board
1. Reconnect/connect the (8120-5014 (x2) ans 8120-5017 (x3)) IF gray
cables item
➀ through item ➃ as shown in Figure 32. (i.e., one end was
installed in Figure 30 on page 51.)
2. Reconnect the W208 – N5240-60112 (Source 1) and W210–
N5240-60113 (LO Source) cables and connect W209 – N5240-60114
(Source 2) to the LFE board as shown – (items
➄ through ➅). The other
ends of these cables are connected to the A11 direct digital synthesizer
(DDS) – (x4) in a later step. Refer to Figure 32 and see also, Figure 30 on
page 51.
Figure 32 Connect A71–A74 bias-T combiners new cables to the A70 LFE board the
other ends of the new LFE cables to the LFE Board (8120-5014 (x2),
8120-5017 (x3), N5240-60112, N5240-60113, and N5240-60114)
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