Agilent Technologies A.18.00 Uživatelský manuál stáhnout pdf (Strana 315)

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Chapter 5, Advanced Operations

Passing Control

Passing Control to the Test Set

Control is passed to the Test Set when it is addressed to TALK and then receives

the Take Control Talker (TCT) command. The programming or controller

command which implements the pass control protocol as outlined in the IEEE

488.1 and 488.2 Standards is language/controller specific. Refer to the appropriate

language/controller documentation for specific implementations.

Before passing control to the Test Set the Active Controller should send the Test

Set the address to use when passing control back. This is accomplished using the

*PCB Common Command. The *PCB command tells the Test Set which address

should be used when passing control back to another bus controller. Before

passing bus control to the Test Set, the currently active controller can use the

*PCB command to tell the Test Set where to send the Take Control (TCT)

command when the Test Set is ready to give up active control of the bus. The

command is followed by a number which contains the bus address of the device

that should become the next active controller. The number must round to an

integer in the range 0 to 30 decimal. The command may be followed by two

numbers. The first will be used as the primary address, the second as the

secondary address of the next active controller.

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