2-22 Model 2790 SourceMeter
®
Switch System User’s Manual
3. Once a location is defined, use the ROUT:MEM:REC command to recall a mem-
ory pattern location, then trigger and acquire a reading using READ?
4. After taking the measurement, use ROUT:OPEN ALL to open all channels.
An example that sets up and executes memory location #1 is shown in Table 2-5. See
“Memory patterns test” on page 5-30 for a more detailed example.
Memory pattern command options
All CALCulate, SENSe, and UNIT subsystem commands with a <clist> (channel list)
parameter associated with Model 2790 DC volts, 2-wire ohms, and 4-wire ohms measure-
ment functions can include a memory pattern <clist> parameter (@Mn) that allows you to
assign those functions to specific memory pattern locations. For example, the following
command selects the 2-wire ohms measurement function for memory pattern location #1:
SENS:FUNC 'RES',(@M1)
Once various attributes are assigned to memory pattern locations, those functions will be
executed when those memory pattern locations are recalled, either individually or while
scanning.
Memory pattern scanning
To perform scanning with memory patterns, simply include the memory pattern locations in
place of channels in the scan list, then set up and trigger a scan in the usual manner. For exam-
ple, the following command sets up a memory pattern scan for memory locations 1, 3 and 5:
ROUT:SCAN (@M1,M3,M5)
Table 2-5
Basic memory pattern example
Command Description
:ROUT:MEM:CHAN 1,(@108,115,118) Specify relays to close.
:ROUT:MEM:DEL 1,0 Set memory delay = 0.
:SENS:FUNC 'RES',(@M1) Select 2-wire ohms measurement function.
:SENS:RES:RANG 100,(@M1) Select 100Ω fixed measurement range.
:SENS:RES:NPLC 1,(@M1) Set A/D integration time to 1 power line cycle.
:ROUT:MEM:REC 1 Recall Memory Location 1.
:READ? Initiate a measurement and request the result.
:ROUT:OPEN:ALL Open all relays.
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