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Model 100A250A

2.2.2.2

Selecting Remote Operation

The Model 100A250A can be placed in the remote operation mode at any time by

switching the FUNCTION switch on the front panel to the REMOTE position. In this

mode, control is transferred to the selected remote interface and all front panel controls are

inoperative with the exception of the FUNCTION switch. The amplifier's initial state

will be Power Off. The front panel VFD will indicate REMOTE until the unit is returned

to the local operation mode.

2.2.2.3

Interface Selection

The Model 100A250A can be controlled via either the IEEE-488 or RS-232 interface; which

interface is active is determined by the position of Switch 6 of the rear panel Dual In-Line Package

(DIP) switch located between the two interface connectors. If Switch 6 is in the "on" (1) position,

the RS-232 interface will be active; if Switch 6 is in the "off" (0) position, the IEEE-488 interface

will be active.

2.2.2.4

Interface Set-up

Switches 1–5 of the rear panel DIP switch are used to select either the RS-232 communication

(BAUD) rate or the IEEE-488 device address, depending upon which interface is active. (Note:

These switches are only read at device power-up. In order for changes made in these switch

settings to take place, AC power must be removed and then re-applied to the Model 100A250A.)

2.2.2.4.1 RS-232 BAUD rate selection

The serial communication (BAUD) rate can be set to five different levels. Selections are made by

the positions of Switches 1–5 of the rear panel DIP switch. The following is a list of the available

BAUD rates and the corresponding DIP switch positions:

BAUD Rate

1200

2400

9600

19,600

76,800

(Note: Any other combination of switch settings will result in a BAUD rate equal to 1200.)

2.2.2.4.2 IEEE-488 device address selection

The IEEE-488 device address can be set to any number between 1 and 30. This selection is made

by setting Switches 1–5 of the rear panel DIP switch to the binary equivalent of the number.

Table 2-1 illustrates this switch selection.

Switch On (1)

1 only

2 only

3 only

4 only

5 only

Manual Text

2-3

REV -