Name: Keithley 2701
Brand: Keithley
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Model 2701 User’s Manual Buffer 6-11

f. TRACe:POINts <NRf> Set buffer size (2 to 450000)

TRACe:POINts? Query buffer size

TRACe:POINts:ACTual? Query # of readings stored in buffer

TRACe:POINts <NRf> – With buffer auto-clear enabled, you can set the buffer to store

from 2 to 450,000 readings. A buffer size of zero or one is not valid (error -222).

With buffer auto-clear disabled, you cannot use this command to set buffer size (error

-221) because it is ﬁxed at 450,000.

NOTE The ¼ full and ¾ buffer full measurement events are not intended to be used

with buffer size smaller than four readings.

TRACe:POINts? and TRACe:POINTs:ACTual? – The :POINts? command queries the

set size of the buffer, while :POINTs:ACTual? queries the number of readings presently

stored in the buffer.

g. TRACe:TSTamp:FORMat ABSolute | DELta Select timestamp format

For front panel operation, both timestamp formats (absolute and delta) can be recalled.

For remote programming, you can only use one timestamp at a time.

NOTE Changing the timestamp format clears the buffer.

The timestamp will only be included with a returned buffer reading if it is speciﬁed as a

data element (see FORMat:ELEMents).

h. TRACe:FEED SENSe | CALCulate | NONE Select source of readings

TRACe:FEED:CONTrol NEXT| ALWays | NEVer Select buffer control

TRACe:FEED — The SENSe parameter selects readings before any enabled mX+b,

Percent, or Reciprocal math calculation. For the CALCulate parameter, the result of the

calculation is stored in the buffer. The NONE parameter disables storage into the buffer.

Math functions are covered in Section 5.

NOTE In order to store readings in the buffer, TRACe:FEED cannot be set to NONE.

TRACe:FEED:CONTrol — Selecting NEXT enables the buffer. After the speciﬁed

number of readings (buffer size) are stored, buffer operation disables. The ALWays

parameter places the buffer into a continuous ﬁlling mode. After the speciﬁed number

of readings are stored, operation wraps back to the ﬁrst buffer location and overwrites

the previous readings. The NEVer parameter disables buffer operation.

Keithley 2701 Specifications

General

Keithley 2701 User Manual

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