DLS 400E3 Operating Manual
Spirent Communications - Page
4-7
7104000537 03/04 -2
3) A check to see if the controller card is functional
Following the self-tests, the simulator re-establishes the loop that was in use before the unit was turned off or
reset. Any impairment modules in the system is set so that all impairments are OFF.
4.7
Common Command Set
As specified in the IEEE 488.2 standard, a number of common commands are required to set up and control
of the standard functions of remote-controlled devices. They can be used with both the IEEE 488 and the
RS–232 interfaces. These common commands are as follows:
*CLS
Clear Status Command
Type:
Status command
Function:
Clears the Event Status Register (ESR). Clearing the Event Status Register also clears
ESB, the bit 5 of the Status Byte Register (STB). It has no effect on the output queue (bit 4
of the STB).
*ESE <NRf>
Event Status Enable
Type:
Status command
Function:
Sets the Event Status Enable Register (ESER) using an integer value from 0 to 255, repre-
senting a sum of the bits in the following bit map:
Bits 7 to 0 have values of 128, 64, 32, 16, 8, 4, 2 and 1, respectively. For example, if bits 3
and 5 are set then the integer value is 40 (8+32).
The ESER masks which bits are enabled in the Event Status Register (ESR).
On power-on, the register is cleared if the Power-on Status Clear bit is 1, or restored if the
bit is 0 (see *PSC for more details).
*ESE?
Event Status Enable Query
Type:
Status command
Function:
An integer value between 0 and 255 representing the value of the Event Status Enable
Register (ESER) is placed in the output queue. The possible values are described in the
*ESE command section.
*ESR?
Event Status Register Query
Type:
Status command
Function:
An integer value between 0 and 255 representing the value of the Event Status Register
(ESR) is placed in the output queue. Once the value is placed in the output queue, the reg-
ister is cleared. The command turns the REMOTE LED green if the LED was red. The
possible values are described in the *ESE command section.
Summary of Contents for DLS 400E3
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