Keysight Technologies N5221BU-665, Руководство пользователя

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Installation Note N5222-90128 71
Installation Procedure for the Upgrade
Step 40. Install/Reinstall the A71–74 and Bias-Tee Combiner’s Gray
Low Frequency Extension (LFE) DC bias Cables and Route Cables
This step contains the following:
— “Install/Reinstall the A71–A74 bias-Tee combiner’s gray Low Frequency
Extension (LFE) DC bias Cables” on page 71
— “Route Cables” on page 72
Install/Reinstall the A71–A74 bias-Tee combiner’s gray Low Frequency
Extension (LFE) DC bias Cables
To see an image showing the location of these cables, refer to Figure 46 on
page 72 . See also the Chapter 6 bookmarks “Bottom Ribbon Cables and Wire
Harnesses, 2-port, Option 205, S/N Prefix
≥
6021” in the PDF Service Guide
1
.
New parts are listed in Table 2 on page 11 .
1. Connect/Reconnect A71–A74 gray DC cables to the test set motherboard
(TSMB) as follows:
—
①
—(Reuse)(N5240-60091) A19 test set motherboard J541 to A71
port 1 bias-T combiner
—
➁
—(N5240-60091) A19 test set motherboard J543 to A72 port 3
bias-T combiner
—
➂
—(N5240-60091) A19 test set motherboard J544 to A73 port 4
bias-T combiner
—
➃
—(Reuse)(N5240-60091) A19 test set motherboard J542 to A74
port 2 bias-T combiner
IMPORTANT! The N5240-60091 (x4) bias combiner cables only connect to
the DC bias of the Bias Tee Combiners.