Fetch Commands - Keysight Technologies BT2152B Operating And Service Manual

4 Programming Reference

Fetch Commands

Fetch commands return measurement data that has been acquired once a test has been started using
the INITiate:TEST commands. They also return measurement data from an external thermistor
connected to the rear panel TEMP input.
FETCh:CURRent:LATest? (@<chanlist>)
FETCh:VOLTage:LATest? (@<chanlist>)
Returns the most recent measurement for the specified channels in ASCII.
Parameter
(none)
<chanlist> active channels from 1 - 32
Returns the latest current measurement: FETC:CURR:LAT? (@1:32)
Returns the latest voltage measurement: FETC:VOLT:LAT? (@1:32)
The FETCh? query does not erase measurements from the reading memory. You can send the query
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multiple times to retrieve the same data. 8192 is the maximum number of ASCII values that can be
returned in any one call.
The instrument clears all measurements from reading memory whenever INIT is executed.
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If INITiate:TEST:MATChed has been configured for a different channel group than the channel group
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specified in this command, non-active channels will return +9.91000000e37 (not a number).
FETCh:CURRent:LOG? <values/chan> [,<offset/chan>], (@<chanlist>)
FETCh:VOLTage:LOG? <values/chan> [,<offset/chan>], (@<chanlist>)
Returns the current or voltage measurement log for the specified channels in ASCII.
Parameter
<values/chan> number of readings returned per channel
<offset/chan> optional value that offsets or skips the num-
ber of readings returned from the beginning of the data log
<chanlist> active channels from 1 - 32
Returns 10 current readings per channel: FETC:CURR:LOG? 10, (@1:32)
Returns 10 voltage readings per channel: FETC:VOLT:LOG? 10, (@1:32)
The readings are returned sequentially in channel groups (i.e. x,x,x,x,x,x,x,x, y,y,y,y,y,y,y,y, ....)
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Where x represents all measurements for channel 1, y represents all measurements for channel 2 etc.
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Typical Return
Comma-separated values
from specified channels
(none)
Typical Return
Multiple comma-separated
values from specified channels
(none)
(none)
Keysight BT2152A/B Operating and Service Guide