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3-32
Table 3.20 - Alphabetical List of 2251A Command Codes (continued)
CODE
RESPONSE
SMZa
Sets Math constant Z to value a. The permitted ranges of values for a are
1 x 10 > a
$
1 x 10
and -1 x 10
$
a > -1 x 10 . a=0 is permitted to be set,
10
-9
-9
10
but an error message will be output when the Math function is enabled.
*SRE?
Query the Service Request Enable Register, response is 0 - 255
*SRE <Nrf>
Set the Service Request Enable (mask) Register, <Nrf> = 0 - 255
SRSm
Sets measurement resolution. m is an integer between 3 and 10. Refer to
Section 3.3.2 for a description of the relationship between resolution and gate
time.
*STB?
Query the Status Byte Register, response is 0 to 113. Bit0 = DDSB, Bit4 =
Message Available, Bit5 = Event Status Bit, Bit6 = RQS/MSS Bit.
T0
Selects continuous measurement mode
T1
Selects single shot measurement mode
T2
Starts Manual Totalize or triggers a measurement cycle when in T1, single shot
mode
T3
Stops Manual Totalize
TA
Selects Total A by B measurement mode
TI
Selects Time Interval measurement mode
*TRG
Trigger the 2251A to start a reading. Use with T1 mode
*TST?
Command the 2251A to do a Internal Self Test, response 0 = pass, 1 = fail
*WAI
Cause the 2251A to complete all pending commands before continuing
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Содержание 2251A
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