6-84 Keysight N5221A/22A Service GuideReplaceable PartsReplaceable Parts Listings6-4-Port Configuration, Option 419Bottom Assemblies, 4-Port, Option 419ReferenceDesignator Part Numbera Qty DescriptionA19 N5240-60163Was N5245-600031 Test set motherboardA20 N5240-60062 bWas N5240-600451 IF multiplexer boardA21 5087-7765 1 LO Multiplier/amplifier 26.5 HMA26.5)A22 5087-71395087-61391 SplitterA23A245087-7829Was 5087-77662 Mixer brickA25A26A27A285087-7757 4 Test port 1 receiver couplerTest port 3 receiver couplerTest port 4 receiver couplerTest port 2 receiver couplerA29A30A31A325087-7813 4 Test port 1 couplerTest port 3 couplerTest port 4 couplerTest port 2 couplerA33 5087-7758 1 Reference mixer switchA34A35A36A3733321-60077 4 Test port 1 source attenuatorTest port 3 source attenuatorTest port 4 source attenuatorTest port 2 source attenuatorA38A39A40A415067-4865 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)A42A43A44A4533321-60078 4 Port 1 receiver attenuatorPort 3 receiver attenuatorPort 4 receiver attenuatorPort 2 receiver attenuatorN5240-60058 2 Front panel LED boarda. 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.1
