Technical data

Installation and Service Guide N5250-90001 3-13

PNA Series Microwave Network Analyzer System System Installation

N5250A PNA, Controller, and Test Head Module Interconnections

Sequence of Test Head Module Connections

NOTE Use a 57 N-cm (5 in-lb) torque wrench to tighten the SMA connectors and a 90 N-cm (8 in-lb)

torque wrench to tighten the 1.85 mm and 3.5 mm connectors.

The connectors on the backs of the test head modules are very closely spaced. Attaching cables to these

connectors is easiest if they are attached in the following sequence as illustrated in Figure 3-7.

① BIAS; +12V @ 1.5A

✍ RF INPUT; SMA connector, 11.17–19.33 GHz @ +5 to +13 dBm

③ LO INPUT; SMA connector, 8.37–14.5 GHz @ +5 to +13 dBm

④ Ref IF; SMA connector

⑤ Test IF; SMA connector

⑥ RCVR A or B; 1.85 mm connector

⑦ RF IN (Port 1 or 2); 1.85 mm connector

⑧ Ground unit (GNDU); sub mini-triax connector (N5250C Options 017 and 018)

⑨ Sense; sub mini-triax connector (N5250C Options 017 and 018)

⑩ Force; sub mini-triax connector (N5250C Options 017 and 018)

Figure 3-7 Test Head Module Cabling Sequence

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