Filter
Top Products
Configuring the RF Switch 9
Chapter 1
Chapter 1
Configuring the RF Switch
Using This Chapter
This chapter gives guidelines to use the Cascade RF Switch module
(RF Switch) including:
• SwitchingDiagram...................................9
• CreatingMultipleMultiplexers..........................12
• RFSwitchConfiguration..............................14
Switching Diagram
The E1470A Cascade RF Switch module consists of a series of twenty
3-to-1 multiplexers. Each 3-to-1 multiplexer can be programatically
cascaded with other 3-to-1 multiplexers to form larger multiplexers. For
example, combining two adjacent multiplexers (cascading) forms a 6-to-1
multiplexer, cascading three forms a 9-to-1 multiplexer, or cascading four
forms a 12-to-1 multiplexer, etc. Cascading all twenty 3-to-1 multiplexers
forms one 60-to-1 multiplexer.
Multiple combinations are simultaneously allowed on the module.
User connections to the module are to SMB connectors on the faceplate.
Figure 1-2 shows the switching diagram of the Cascade RF Switch module
with the switches shown in the power-on/reset state.
Since the relays on the switch are Form C, the relays are considered to
be
reset (or opened) when the COMMON terminal is connected to the NC
terminal (the power-on/reset state). Relays are considered to be
set (or
closed) when the COMMON terminal is connected to the NO terminal.
See Figure 1-1.
Figure 1-1. Form C Relays States
COMMON
NO
NC
Power-On/Reset
or Open State State
Set or Closed
Form C Relay
COMMON
NO
NC
Form C Relay