Keysight Technologies N5244/5B Service Manual page 531

Replaceable Parts
Replaceable Parts Listings
Ref- Serial Part Number
erenc Number
e Prefixes
Desig-
a
Affected
nator
All prefixes 5022-1087
26
All prefixes 0515-1521
27
All prefixes N5245-00011
28
–– N5245-00036
–– N5245-00037
All prefixes 08360-20133
29
All prefixes 2190-0016
30
All prefixes 5063-1700
31
-- All prefixes 0515-2487
-- All prefixes 2190-0584
-- All prefixes N5245-00026
-- All prefixes N5245-00032
-- All prefixes N5245-00034
a. In this table, the two letters that indicate the PNA manufacturing location have been removed from each serial number prefix.
b. Some PNA models have newer model A27/A28 mixer blocks installed. A68/A69 3 dB attenuators are only applicable to
instruments with legacy 5087-7323/5087-6323 mixer bricks. The new 5087-7417 mixer brick have the 3 dB pads integrated
into the mixer brick assembly. Legacy A27/A28 mixer bricks use the 5245-20021 semi-rigid cable. New mixer bricks use the
N5245-20191 semi-rigid cable.
c. If you are replacing older test set front plates with current test set front plates (2-port N5224-00004, and 4-port
N5224-00005), both LED boards must be removed and reinstalled after being rotated 180 degrees. Also, older LED board wire
harnesses must both be replaced with current wire harnesses (N5225-60001).
Keysight N5244B/45B Service Guide
Qty Description
4 Test port coupler dress nut (One for each coupler.)
4 Machine screw, M3.0 x 5, flat head (To attach front panel LED boards.)
4 Bracket (For all bias tees.)
3
Bracket (For LFE bias combiners – ports 1,3, & 4) – Implied by
not shown in figure
1
Bracket (For LFE bias combiners – port 2) – Implied by
shown in figure
2 Hex nut, for bulkhead connector. (Option 224) (Use 9/16 in.
wrench/socket at 21 in-lb.)
2 Lock washer
2 Bulkhead connector. (Option 224 only.)
2 Machine screw, M2.5 x 8, flat head (To attach A58 bridge to its bracket.
Option 029)
2 Washer, flat, helical, 3.1 mm-ID, 6.2 mm-OD (For screws used to
attach A57 port 2 bypass switch to its bracket. Option 029)
1 Bracket, for A56 port 1 bypass switch (Option 029)
2 Bracket, for A58 bridge and Options 029 noise downconverters.
(Option 029 only)
1 Bracket, for A56 port 1 noise bypass switch (Option 029)
, but
28
, but not
28
6-297