262 34980A User’s Guide
9 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
programmatically, 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 264.
The 34946A and 34947A modules implement a verification feature,
which senses the actual hardware state of the specified channels
following a
ROUTe:CLOSe or ROUTe:OPEN operation. If a switch operation
appears to have failed, an error will be generated at the time the
ROUTe:CLOSe or ROUTe:OPEN command is executed. An error will be
generated for each channel operation that did not properly verify.
The verification process will slow overall switching performance on
the module.
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