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Introduction
This chapter contains instructions on how to operate the Product remotely through the
IEEE 488.2 GPIB interface. The master unit in a chain of 52120A instruments can be
controlled remotely through the IEEE 488.2 GPIB interface. Only the master unit is
controlled by the remote commands. The remote interface is disabled when a unit is
configured as a slave.
IEEE-488.2 Compliance
The Product is programmable for use on the IEEE Standard 488.1 interface bus (IEEE-
488 bus). The interface also complies with supplemental standard IEEE-488.2. Devices
connected to the bus in a system are designated as talkers, listeners, talker/listeners, or
controllers. Under remote control of an instrument controller, the Product operates
exclusively as a talker/listener on the IEEE-488 bus.
To learn more, read the standard specification in the publication ANSI/IEEE Std. 488.1 –
1987 and IEEE Std. 488.2 – 1988.
How to Set the Bus Address
The address that the product responds to on the IEE 488.1 bus is set by switches on the
rear panel. See Figure 3-1. The right hand 5 of these switches are used to set the address.
The right most switch (1) is the least significant bit, and switch 5 (16) is the most
significant bit.
When the Product is a slave to a 52120A or 6105A/6100B, the GPIB
interface is made passive and no longer can be addressed on the GPIB bus.
Use a pointed object (such as a pencil) to set the switches to the necessary GPIB address
in binary. The five switches are labelled from right to left 1, 2, 4, 8, 16, their binary
contribution to the address. Push the top of the switch to "set" the address bit. Push the
bottom of the switch to "clear" the bit. The GPIB address is invalid if you set (address
31) or clear (address 0) all the address switches.
The address switch is only read at power-on. A change to the address
switch with power on must be followed by a power-cycle of the instrument.
Only then will the Product answer to the new address.
Figure 3-1. IEEE Bus Address Switches
Note
Note
3
Remote Operations
Introduction
gpp015.eps
3-3
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