Keithley 2701

Model 2701 User’s Manual Buffer 6-9
Table 6-1
Buffer commands
Command Description Default
1
Ref
SYSTem:TIME <hr, min, sec> Set clock time in 24-hour format. a
SYSTem:DATE <yr, mo, day> Set clock date; yr specified as 20xx. b
SYSTem:TSTamp:TYPE
<name>
Select timestamp; <name> = RELative or RTCLock. REL c
SYSTem:TSTamp:TYPE?
Query timestamp type that will be used for the next
buffer storage.
c
TRACe:TSTamp:TYPE?
Query timestamp type for readings presently in buffer.
c
TRACe:CLEar Clear the buffer immediately. d
TRACe:CLEar:AUTO <b> Enable/disable buffer auto-clear; <b> = ON or OFF. ON d
TRACe:FREE? Query bytes available and bytes in use. e
TRACe:POINts <NRf> Specify size of buffer; <NRf> = 2 to 450000. 100 f
TRACe:POINts? Query size of buffer. f
TRACe:POINts:ACTual? Query number of readings stored in buffer. f
TRACe:TSTamp:FORMat
<name>
Select timestamp format; <name> = ABSolute or
DELTa.
ABS g
TRACe:FEED <name> Select source of readings; <name> = SENSe[1],
CALCulate[1], or NONE.
CALC h
TRACe:FEED:CONTrol
<name>
Set buffer control; <name> = NEVer, NEXT, or
ALWays.
NEV h
TRACe:DATA? Read all readings in the buffer. i
TRACe:DATA:SELected?
<start>, <count>
Specify readings to be returned; <start> = starting
point, <count> = number of readings.
j
TRACe:NEXT? Query buffer location for next stored reading. j
TRACe:NOTify <NRf> Specify number of stored readings that will set Trace
Notify bit (B6) of measurement event register;
<NRf> = 1 to 449999 (must be less than
TRACe:POINts value).
k
FORMat:ELEMents <item list> Specify elements for TRACe:DATA? response
message; <item list> = READing, CHANnel, UNITs,
RNUMber, and TSTamp.
(Note 2) l
CALCulate2:FORMat <name> Select buffer statistic; <name> = MINimum,
MAXimum, MEAN, SDEViation, PKPK, or NONE.
NONE m
CALCulate2:STATe <b> Enable/disable statistic calculation; <b> = ON or OFF. OFF m
CALCulate2:IMMediate Calculate data in buffer. m
CALCulate2:IMMediate? Calculate data and read result. m
CALCulate2:DATA? Read the selected buffer statistic. m
Notes:
1. SYSTem:PRESet and *RST have no effect on TRACe commands. The listed defaults for TRACe commands are set at the factory.
2. The SYSTem:PRESet and *RST default is READ, UNIT, RNUM, and TST.