Agilent Technologies 87130A manual Connecting Switch Drivers to Switches and Attenuators

Models: 87130A

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Driver Boards

Driver Boards

Using the Internal Driver

Installing the 87130A Attenuator/Switch Driver

Connecting Switch Drivers to Switches and Attenuators

Connecting Switch Drivers to Switches and Attenuators

The standard 87130A attenuator/switch driver has a single internal driver board capable of driving 31 switches. The attenuator/switch driver may also be connected to a maximum of seven external 84940A driver board which can control and sense switching states for up to 217 additional switches.

The internal driver card is terminated with a 68-pin SCSI II type connector for connecting external switches. The 84941A distribution board should be used to connect the switch driver to switches and attenuators.

The distribution board has 31 4-pin black output connectors numbered J1 to J31 (silkscreened on the circuit side of the PCA), in addition to 31 mating cables which allow a cable harness to be quickly assembled to connect to relays. Refer to Figure 2-6for pin wiring that determines an OPEN or CLOSE condition on each switch.

Each relay (switch) is referred to as a channel by the switch driver. Each channel has its own unique address. The switch driver begins numbering channels at 0 instead of 1. Switch one, wired to J1 on driver card 1, would have a channel address of 100.

1.Connect the internal driver board of the switch driver which is terminated with a 68-pin SCSI II type connector (driver output) to an 84941A distribution board. Use the six foot cable with two male 68-pin SCSI II type connectors that is shipped with the 87130A.

Figure 2-2 Typical Operating Setup Using Internal Driver

2-4Agilent 87130A Operating and Service Manual

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Agilent Technologies 87130A Connecting Switch Drivers to Switches and Attenuators, Driver Boards Using the Internal Driver