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8
Dual/Triple Microwave Switch Modules
34946A and 34947A Dual/Triple Microwave Switch Modules
The 34946A and 34947A modules offer single- pole, double- throw switches in
either 4- GHz or 20- GHz options.
The 34946A and 34947A modules do not connect to the analog buses.
Instead, all connections are made through the visible SMA connectors via
external cables. Each connector on the modules is labeled with a three- digit
number that represents a channel you can control programatically, from the
front panel, or with the Web UI.
The 34946A module uses two independent Agilent N1810TL switches. These
terminated 3- port 50- ohm switches are designed to maintain impedance
matching. The 34947A module contains three independent Agilent N1810UL
switches. These higher density 3- port switches are unterminated. For
channel configuration on each module, refer to the simplified schematics
on
34946A and 34947A SCPI Programming Examples
The programming examples below provide you with SCPI command
examples to use for actions specific to the microwave switch modules.
The slot and channel addressing scheme used in these examples follow the
form sccc where s is the mainframe slot number (1 through 8) and ccc is the
three- digit channel number. For information on specific configurations, refer
to the simplified schematics in this chapter.
For complete information on the SCPI commands used to program the
34980A, refer to the Agilent 34980A Programmer's Reference contained on
the 34980A Product Reference CD. For example programs, also refer to the
34980A Product Reference CD.
Example: Closing channels
on the microwave switch modules, but these modules do not support the
ROUTe:OPEN command. You can open channels by closing other channels.
With this "one- step" operation, the relays switch in the proper order that
avoids momentary connection of the wrong input to the switch output. The
following statement closes channel 201 of a microwave switch module
installed in slot 5.
ROUTe:CLOSe (@5201)
Example: Querying channels for open or close state The following command
returns the open (1) or close (0) state of channel 202 for a module in slot 3.
ROUTe:CLOSe? (@3202)
182
page
184.
You can use the ROUTe:CLOSe to close channels
34980A User's Guide
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