32 Using the RF Multiplexers
Chapter 3
Switching Channels
For general purpose switch operation, you can connect a signal by closing
a specific channel to its COMmon. One channel per bank will be connected
to COMmon at all times, and only one channel per bank can be closed at a
time. Switching configurations include standard, matrix, and tree. The
following channel configurations are possible.
•
Close channels 00 to 03 by connecting a channel to COM00.
•
Close channels 10 to 13 by connecting a channel to COM10.
•
Close channels 20 to 23 by connecting a channel to COM20.
•
Close channels 30 to 33 by connecting a channel to COM30.
•
Close channels 40 to 43 by connecting a channel to COM40.
•
Close channels 50 to 53 by connecting a channel to COM50.
Use CLOSe
channel_list
to close a channel to COMmon.
channel_list
has
the form (@
ccmmnn
) for a single channel, and (@
ccmmnn
,
ccmmnn
,...) for
two or more channels.
•
cc
= card number (01-99).
•
mm
= module number (00-02).
•
nn
= channel number (00-03, 10-13, 20-23, 30-33, 40-43, 50-53).
NOTE
The following examples are shown using multiple configurations
(multiple-module switchbox and single module switchbox with Expander
modules) to illustrate programming differences. All the examples shown
could have been performed using only one E1472A or E1474A RF
Multiplexer module.
Example: Standard
Switching
You can use standard switching to switch channels n0-n3 to COM n0 (where
n = Switching bank number 0 to 5). One channel per bank can be connected
to its common at a time.This example connects channel 11 to COM10 of an
RF Multiplexer in a standard configuration. The RF Multiplexer without
Expander modules is defined as a single-multiplexer switchbox instrument.
In Figure 3-1, execute CLOS (@111) to connect COM 10 to channel 11 .
Figure 3-1. Example: RF Multiplexer Standard Switching
RF Multiplexer
Bank 1
Input/Output
Common 10
Channel 13
Input/Output
Channel 12
Channel 11
Channel 10
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