HP E1367A - Manual (Page 21)

Tree Configuration Figure 2-3 shows a typical tree configuration which uses two RF
multiplexers to provide a 1 x 12:1 multiplexer. This configuration provides
isolation of test points while maintaining characteristic impedance. With
tree configuration, signal delay time is more than doubled since the signal
must pass through two channel banks plus extra cabling. Keep cables as
short as possible, especially between channel banks, to minimize delay.
Figure 2-3. Typical Tree Configuration
Chapter 2 Configuring the HP E1366A/E1367A RF Multiplexers 21