3-14 Installation and Service Guide N5251-90001
System Installation
PNA, Controller, and Test Head Module Interconnections
PNA Series Microwave Network Analyzer System 
N5251A
5. Place the test head module on the work surface in fro
nt of the controller.
6. Connect the five cables to the test head module. Details are illustrated in 
Figure 3-5. Recommended order of connection:
•+12 V
•R.F. In
•L.O. In
•Ref I.F.
•Test I.F.
7. Torque all cable connections.
Figure 3-5 Details for Test Head Module Connections 
8. Apply Velcro fasteners to the ends o
f the cable sleeve as shown in Figure 3-4 and Figure 3-5. 
For instructions, refer to steps 6 through 8 of the Installation Guide from the Millimeter-wave 
Cable Dress kit (document part number N5260-90070 contained in kit part number 
N5261-60019).
9. Position the test head module in the approximate location where it will be used for 
measurement operation.
10.Connect two cables with 1.85 mm connectors (8121-1233) between the front panel of the 
PNA and the test head modules. Details are shown in Figure 3-2 on page 3-11.