Agilent Technologies Switch/Measure manual 34946A and 34947A Dual/Triple Microwave Switch Modules

8Dual/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 page 184.

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 You can use the ROUTe:CLOSe to close 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 34980A User’s Guide