Electronic Calibration Modules Reference Guide         1-7
General Information
Models and Options
 N4431D Modules (RF Four-Port)
ECal modules from this series are available with the connector types and 
frequency ranges shown in Table 1-1 on page 1-6. Mixed connector options 
allow you to configure the module with a different connector type at each port 
(as shown in Figure 1-2 on page 1-5). 
Figure 1-3  Model N4431D Option Type-N m and f shown
Figure 1-4  Model N4431D Option 3.5 mm f and f shown