Installation Note N5227-90118 53
Installation Procedure for the Upgrade
Install the A71, A72, A73, and 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
. See also the Chapter 6 bookmarks “Bottom Ribbon Cables and Wire
Harnesses, 4-port, Option 420 (
S/N Prefixes
<
6021)” and “Bottom Ribbon
Cables and Wire Harnesses, 4-port, Option 420 (
S/N Prefixes
≥
6021)”in the
PDF Service Guide
1
. New parts are listed in
4.
Connect A71–A74 blue DC cables to the test set motherboard (TSMB) as
follows:
—
—(N5242-60091) A19 test set motherboard J541 to A71 port 1
bias-T combiner
—
—(N5242-60091) A19 test set motherboard J543 to A37 port 2
bias-T combiner
—
—(N5242-60091) A19 test set motherboard J544 to A37 port 2
bias-T combiner
—
—(N5242-60091) A19 test set motherboard J542 to A37 port 2
bias-T combiner
1. See
“Downloading the Online PNA Service Guide” on page 9
IMPORTANT!
The N5240-60091 (x4) bias combiner cables only connect to the
DC bias of the Bias Tee Combiner.