Anritsu MS8608A, Руководство по эксплуатации, Страница: 251 / 338

SECTION 5 INITIAL SETTINGS
5-3
In the IEEE488.2 standard, there are three levels of initialization. The first level is “bus
initialization,” the second level is “initialization for message exchange,” and the third
level is “device initialization.” This standard also stipulates that a device must be set to
a known state when the power is turned on.
The IFC message from the controller initializes
all interface functions connected to the bus.
Message exchanges of all devices and speci-
fied devices on the GPIB are initialized using
the SDC and DCL GPIB bus commands,
respectively. These commands also nullify the
function that reports operation completion to
the controller.
The
∗
RST or INI/IP command returns a speci-
fied device to a known device-specific state,
regardless of the conditions under which it was
being used.
Level 1 can be combined with
other levels, but must be execut-
ed before level 2.
Level 2 can be combined with
other levels, but must be execut-
ed before level 3.
Level 3 can be combined with
other levels, but must be execut-
ed after levels 1 and 2.
Level
1
2
3
Initialization type
Bus initialization
Initialization for
message exchange
Device
initialization
Description Level combination and sequence
When using the standard RS-232C interface port or the optional Ethernet interface port
to control the MS8608A/MS8609A from the controller, the level-3 device initialization
function of can be used, and the level-2 initialization function cannot be used. When
using the standard GPIB interface bus to control the MS8608A/MS8609A from the
controller, the initialization functions of levels 1, 2, and 3 can be used.
The following paragraph describes the commands for initialization at levels 1, 2, and 3
and the items that are initialized. This paragraph also describes the known state which
is set when the power is turned on.