Technical data

2-4 Installation and Service Guide N5250-90001
System Description PNA Series Microwave Network Analyzer System
Basic System Configurations N5250A
Basic System Configurations
The N5250C can be used in either of two basic configurations, depending on how the test ports are
connected to the device under test (DUT): coaxial measurement configuration or wafer probe measurement
configuration.
CAUTION Input power to the test ports must not exceed +27 dBm. Input power in excess of this level
will damage expensive components. Observe proper precautions, especially when
measuring amplifiers with gains of 20 dB or greater.
Coaxial Measurement
This configuration is used when the DUT has coaxial connectors. The N5250C test ports have 1.0 mm coaxial
connectors, and are designed to cover a frequency range of 10 MHz to 110 GHz.
In this configuration, the test head modules are placed on a work bench in front of the millimeter head
controller.
The DUT is normally connected to the test ports by way of a 1.0 mm coaxial cable (test port cable). Connect
the device to Port 1 (left test head module) directly, and to Port 2 (right test head module) by way of a test
cable. It is also possible to connect the DUT using a test port cable on each test port, although this
configuration will result in greater signal loss.
CAUTION Do not attempt to connect a test device directly between the two 1.0 mm test ports, without
at least one test port cable. The test head modules will not move freely enough to allow such
a connection to be made safely.
Figure 2-2 on page 2-5 shows how the instruments are configured on a work bench for the coaxial
measurement configuration. The test head modules are placed on the bench top in front of the PNA and
controller.