Model 30S1G6
2.4 REMOTE COMMUNICATIONS
This section describes remote operation of this product using the installed communications ports connected
to a remote 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
REMOTE
/
LOCAL
switch on the front panel allows for the amplifier to be controlled using the remote
communications ports or the front panel controls depending on its position. All remote queries will work in
either 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.
NOTE: Some of the following ports may not be installed on your amplifier.
2.4.1
IEEE-488 (GPIB) Communications
For IEEE-488 operation, the device address is set using the dip switches on the rear panel of the amplifier. It
is set to address 1 at the factory. If another device on the IEEE-488 bus is already using address 1, reset the
switch to a vacant address. (Resetting the address requires re-booting the unit).
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 to the unit via the GPIB interface, terminate the command with a
<LF>
, an
EOI
,
or both. The system ignores characters following the termination.
2.4.1.1
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 setting
Switches 1 to 5 of the rear panel DIP switch to the binary equivalent of the number. Table 2-1 illustrates this
switch selection. Please note that although addresses 0 and 31 can be entered, neither address is valid for this
device, and therefore should be avoided.
Table 2-1. IEEE-488 Address Selection
Device Address
Switch 1
Switch 2
Switch 3
Switch 4
Switch 5
0
DO NOT USE - (RESERVED FOR CONTOLLER)
1
on (1)
off (0)
off (0)
off (0)
off (0)
2
off (0)
on (1)
off (0)
off (0)
off (0)
3
on (1)
on (1)
off (0)
off (0)
off (0)
4
off (0)
off (0)
on (1)
off (0)
off (0)
5
on (1)
off (0)
on (1)
off (0)
off (0)
:
30
off (0)
on (1)
on (1)
on (1)
on (1)
31
DO NOT USE
Rev A
7
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