Spirent DLS 400E3, Руководство по эксплуатации

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DLS 400E3 Operating Manual
Page 4-6 - Spirent Communications
7104000537 03/04 -2
*RST.,
*RST;*WAI;:sourceA:output off
*ESE 45; *SRE 16
IEEE 488 messages to the host system may be terminated with either a Line Feed character (ASCII <LF>,
decimal 10, hex 0A), an IEEE 488 EOI signal or both. RS-232 messages must be terminated with a line feed
character. Messages from the host system are always terminated with a Line Feed character, and also with
the EOI signal if using the IEEE 488 interface.
As defined in the SCPI specifications, a Device Dependent Command may be sent in its short or long form,
in upper or lower case. The following commands therefore are identical in operation:
: s ourceA:IMPULSE:RATE 100 PPS
:sourceA:IMPULSE:RATE 100
:sourceA:IMPULSE:RAT 100
:sourceA:IMP:RAT 100
:sourceA:impulse:rate 100
:sourceA:Impulse:Rate 100 pps
Queries of the system follow the same format as the commands, except that the data normally associated
with a command is replaced by a question mark "?". Following receipt of such a command, the simulator
places the appropriate response in the output queue, where the controller can read it.
Examples are:
*IDN?
*ESE?;*SRE?
:sourceA:IMPULSE:RATE?
When a command does not begin with a colon, the simulator assumes that the command is at the same level
as the previous command. For example, to set the impulse, it is NOT necessary to specify
":sourceB:IMPULSE" for each parameter but rather the following command may be used:
:sourceA:IMPULSE:TYPE BIPOLAR;RATE 100;WIDTH 50
4.6 Self-Test
The DLS 400E3 has 2 LEDS which indicate the power status and the remote status of the units.
The POWER LED turns green when the power is turned on or after a reset. The POWER LED turns yellow
if it detects an internal error.
The REMOTE LED turns off after a power-up and a reset, when the simulator receives the first remote com-
mand message, the REMOTE LED turns green. If the simulator detects an error in the message the
REMOTE LED turns red and stay red until the error flags are cleared.
When power is first switched on, the simulator does a series of self-tests. If any of the self-tests fail, the sim-
ulator flashes the POWER LED red, in which case Spirent Communications Customer Service should be
contacted. Contact information can be found in Chapter 8 "CUSTOMER SUPPORT".
The following is a short description of some of the self-tests the simulator performs:
1) A check to see if the checksum of the EPROM is valid.
2) A check to see if the non-volatile RAM is functional. The battery has an expected life of over 10
years, and, if necessary, it can be easily replaced.