Escort 3136A, Руководство по эксплуатации

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73
CONF igure is a root level keyword with the second level keyword, VOLT age,
and 0.5 is the command parameter. The query command ends with a question
mark
“
?
”
.
Note:
SCPI stems from IEEE488.1 and IEEE 488.2. Although the IEEE 488.2 standard addressed
some instrument measurements, it principally dealt with common commands and syntax or data
formats. Please refer to the IEEE488.2 and SCPI reference manual for more information.
7-4-2 Data Types of Responding Message
Responding message is the data from the meter in response to a query. A query
is a command followed by a question mark. Table 7-2 is explanation for data
types.
Table 7-2. Data Types of Responding Message
Data Type Explanation Example
<NR1> An integer
+10000, -10000,
123, -100
<NR2>
This numeric representation has an explicit radix
point.
+13.234, -.00002,
3.4567
<NR3>
This representation has an explicit radix point and
an exponent.
+1.2E+2, +0.1E+0,
-0.12E-3, 9E+9
<Numeric value> Accepts <NR1>, <NR2> and <NR3> data types.
<NRf>
Flexible numeric representation
(Only positive integers).
100, 255, 16
<Boolean>
Single ASCII-encoded byte, is return for the settings
query.
0 or 1,OFF or ON
<Literal>
ASCII-encoded bytes corresponding to the short
form of the literal used as the command parameter.
DCV, ACA
7-4-3 Status Reporting
The meter status registers conform to the SCPI and IEEE-488.2 standards.
Service Requests (IEEE-488 Only and Status Registers)
Service requests let a meter on the IEEE-488 bus get the attention of the host.
Service requests are sent over the service request (SRQ) bus line.
If more than one instrument on the bus is capable of sending service requests,
the host can decide which instrument made the request by taking a "serial poll."
Each instrument on the bus responds to the poll by sending the contents of its Status
Byte Register.
If an instrument on the bus has made a service request, the request service bit
(RQS, bit 6) of its Status Byte Register will be set to 1, identifying it as an