Keysight Technologies N5244/5B Service Manual page 470

Replaceable Parts
Replaceable Parts Listings
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. On instruments with a new HMA26.5 the N5245-20048 cable is used in all 2-port and 4-port instruments. And, on
instruments with legacy HMA26.5, N5245-20150 is used on all 2-port instruments with Option 029. But, on 4-port
instruments with a new HMA26.5 N5245-20196 is used with Option 029. If you are unclear which HMA26.5 assembly your
PNA has installed, refer to "Verify the Model/Version of HMA26.5 Installed" on page 7-45
on page 45.
6-236
and to Figure 7-20
Keysight N5244B/45B Service Guide