AR 10036390, Руководство по эксплуатации и обслуживанию

Страница: 31 / 56

Model 800A3B
Rev D 15
2.5.1.4 Repeat the Procedures in Sections 2.5.1.1 through 2.5.1.3 at Each Test
Frequency.
2.6 REMOTE OPERATION
This section describes remote operation of this amplifier using the provided remote communication ports
connected to a device such as a personal computer. All ports are active at all times, however only one port
may be used at a time. Communicating through two or more ports at one time will cause data collisions and
lost commands or queries.
The Keylock switch on the front panel allows the amplifier to be controlled using the remote communications
ports, the front panel controls, or neither depending on its position. All remote queries will work in any
switch position. All remote commands will only work when the switch is set to REMOTE. When the switch
is set to REMOTE all front panel controls are disabled. However, faults can be reset locally by way of the
Reset button displayed on the touch screen regardless of Keylock switch position.
2.6.1 IEEE-488 (GPIB) Communication
For IEEE-488 operation, the device address is set using the front panel touch screen. Ensure that each device
connected to the IEEE-488 bus is set to a unique address.
Specific IEEE-488 bus commands depend on which software package you are using. To send commands be
sure that the amplifier’s address is set properly and that the controller has correctly identified the unit as a
“listening” device.
When sending commands via the GPIB interface, terminate the command with a Line Feed character, an EOI,
or both. The amplifier will ignore characters following the termination.
2.6.1.1 Setting the IEEE-488 (GPIB) Address
The IEEE-488 device address can be set to any number between 1 and 30. This selection is made by
navigating to the GPIB address selection screen. To get there from the Main Menu, touch the User menu
button followed by the I/O menu button and finally the GPIB menu button. Touching any of the buttons
labeled 1 to 30 immediately sets the GPIB address to the corresponding value. A thin black outline indicates
the present address selection. When the back button is pushed, the address selection is stored to non-volatile
memory. Therefore, if power is lost prior to hitting the back button, any address selection changes will be
lost.
2.6.2 RS-232 Communication
The RS-232 port is a serial communications bus. All commands and queries through this port must be
terminated with a Line Feed character. When a valid query is received, it is processed and the result is
immediately transmitted back over the RS-232 interface. This port is designed to time-out if there is no
activity on the bus for more than 5 seconds. At this time the internal buffer is cleared and a
TIMEOUT_ERROR message followed by a Line Feed character is sent out from this port.
The baud rate for the RS-232 port is user selectable from the RS-232/Fiber-Optic Serial Baud Rate selection
screen. To get there from the Main Menu, touch the User menu button followed by the I/O menu button and
finally the Serial menu button. A thin black outline indicates the present baud rate selection. When the back