72 Installation Note N5222-90131
Description of the Upgrade
Installation Procedure for the Upgrade
-
Step 40. Install/Reinstall the A71–74 Bias-Tee combiner’s Gray Low
Frequency Extension (LFE) DC Bias Cables and Route Cables
This step contains the following:
—
“Install the A7–74 bias-Tee combiner’s blue Low Frequency Extension
(LFE) DC bias Cables” on page 72
—
Install the A7–74 bias-Tee combiner’s blue Low Frequency Extension
(LFE) DC bias Cables
To see an image showing the location of these cables, refer to
. See also the Chapter 6 bookmarks “Bottom Ribbon Cables and Wire
Harnesses, 2-port, Option 205
, S/N Prefixes
≥
6021
” in the PDF Service Guide
1
.
New parts are listed in
1.
Connect/Reconnect A71 and 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
1. See
“Downloading the Online PNA Service Guide” on page 8
IMPORTANT!
The N5240-60091 (x4) bias combiner cables only connect to
the DC bias of the Bias Tee Combiner.
Содержание N5221B
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