6-84 Keysight N5224A/25A Service GuideReplaceable PartsReplaceable Parts Listings6-4-Port Configuration, Option 419Bottom Assemblies, 4-Port, Option 419ReferenceDesignator Part Numbera Qty DescriptionA23 N5245-60157Was N5247-600011 Test set motherboardA24 N5240-60062 bWas N5240-600451 IF multiplexer boardA25 5087-7765 1 LO Multiplier/amplifier 26.5 (HMA26.5)A26 5067-4086 1 SplitterA27A285087-73235087-63232 Mixer brickA29A30A31A325087-7760 4 Test port 1 receiver couplerTest port 3 receiver couplerTest port 4 receiver couplerTest port 2 receiver couplerA33A34A35A365087-7793 4 Test port 1 couplerTest port 3 couplerTest port 4 couplerTest port 2 couplerA37 5087-7759 1 Reference mixer switchA38A39A40A4133325-60016 4 Test port 1 source attenuatorTest port 3 source attenuatorTest port 4 source attenuatorTest port 2 source attenuatorA42A43A44A455087-7789 4 Test port 1 bias tee (includes wire harness)Test port 3 bias tee (includes wire harness)Test port 4 bias tee (includes wire harness)Test port 2 bias tee (includes wire harness)A46A47A48A4933325-60017 4 Port 1 receiver attenuatorPort 3 receiver attenuatorPort 4 receiver attenuatorPort 2 receiver attenuator➀ N5240-60058 2 Front panel LED boardA69 08490-60039 1 3 dB attenuator (pad) connected to mixer brick (R4)a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” onpage 6-4.b. All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connectorP1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectorsremoved. If your instrument contains a N5242-60031 cable, remove it from your instrument.
