Keysight N7734A Switch
Avoid damaging the inputs of DCA-M modules. The front panel of many optical switches list the maximum power above which the switch is damaged. Be aware that the switch's maximum power level may far exceed the maximum safe power limits to DCA-M module inputs. Never exceed the maximum power level shown on the DCA-M module's front panel.
Keysight N7734A Switch IDs
Because the N7734A switch only has one output which must be connected to a DCA-M, an output is unavailable to a demultiplexer, impairment, or user instrument.
| Front Panel | ||
|---|---|---|
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| Switch Ports | ||
| Front Panel Label | Ports 1 through 13 | A |
| Port Function in FlexOTO | Inputs From | Outputs To |
| DCA-M Modules | ● | |
| DUT Fixtures | ● | |
| Demultiplexers | ||
| Impairments | ||
| User Instruments | ||
| Color definitions in table: | ||
| Switch ports that FlexOTO considers to be switch inputs. | ||
| Switch ports that FlexOTO considers to be switch ouputs. | ||
| Hardware Diagram Switch Block | Switch Setup Dialog (To open, click on Switch Block) |
|---|---|
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Switch drawings are representative examples as switch models often come in different configurations. FlexOTO supports other module/switch configurations that are not shown. The basic concepts still apply.
The number of fixtures tested, lane counts, and DCA-M channels all consume available switch ports. In the Available Port Connections table above, equipment shown as available may in fact be unavailable due to situations in which all available ports are already assigned. In these situations, you may be able to free up switch ports by using only one DCA-M channel or deleting a user instrument, impairment, or multiple fixtures. Of course, switches with more ports provide more flexibility.
Example Setup
This example shows three Fixtures being tested using a Keysight N7734A 1 x 13 switch. The N1092A DCA-M is a complete acquisition system as it includes clock recovery. These Fixtures have multiple clock domains, which indicate all the lanes to which a specific clock applies. You assign the domains to different lanes in the Hardware Diagram by clicking on the Fixture block, which opens the Fixture Setup dialog.
