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