Keysight N5224B, Service Manual, Page: 389 / 614

Keysight N5224B/25B Service Guide 6-169
Replaceable Parts
Replaceable Parts Listings
4-Port Configuration, Option 417, S/N Prefix <6021
Bottom Assemblies, 4-Port, Option 417, S/N Prefix <6021
The following may apply to your B model PNA: In August 2020, the
N5224/44B and N5225/45B analyzers underwent multiple hardware
changes. Some instruments that have A25 – 5087-7765 HMA26.5
multiplier amplifier (with a discrete A26 power splitter and some
semi-rigid cables) and A27/A28 – 5087-7323/5087-6323 mixer bricks
(with 50 ohm pads and some semi-rigid cables) and were replaced with
integrated components: A25 – N5240-60101 (with a power splitter) and
A27/A28 – 5087-/5087-6417 (with the 50 ohm pads). Refer to the tables
in this section of the manual to learn which assemblies and cables may be
impacted by these changes.
The mixer block and 50 ohm pad changes do not impact PNAs with
Options 210/410. But, the HMA26.5 multiplier amplifier changes are
potentially applicable to all Options.
Be very careful to use the appropriate hardware in your analyzer. Using the
wrong hardware can ruin analyzer components, resulting in additional
customer costs.
Reference
Designator
Part Number
a
Qty Description
A23 N5245-60157
Was N5247-60001
1 Test set motherboard
A24
N5240-60062
b
Was N5240-60045
1
IF multiplexer board
c
A25 N5240-60101
Was: 5087-7765
1 LO Multiplier/amplifier 26.5 (HMA26.5)
A26 5067-4086 1 Splitter
A27
A28
5087-7417
5087-6417
Was: 5087-7323
Was: 5087-6323
2 Mixer brick
A29
A30
A31
A32
5087-7760 4 Test port 1 receiver coupler
Test port 3 receiver coupler
Test port 4 receiver coupler
Test port 2 receiver coupler
A33
A34
A35
A36
5087-7793 4 Test port 1 coupler
Test port 3 coupler
Test port 4 coupler
Test port 2 coupler