
Agilent B1500A/B1505A Programming Guide, Edition 11 4-113
Command Reference
LOP?
Syntax LOP?
Query Response LOP stat1,stat2,stat3,stat4,stat5,stat6,stat7,stat8,stat
9,stat10<CR/LF^EOI>
The variables stat1 to stat10 will indicate the status of the module installed in the
slot 1 to 10 respectively, and will be the two-digit status code shown in Table 4-26.
Table 4-26 LOP? Response
For the HPSMU that occupies two slots, two variables will be returned. Then the
first one is always 00, and the last one indicates the module status. For example,
LOP00,11,00,00,00,00,00,00,00,00 will be returned when only the
HPSMU installed in the slot 1-2 is used and is in the voltage compliance condition.
Example
Statements
OUTPUT @B1500;"LOP?"
ENTER @B1500;A$
Status code Description
00 No module is installed, or the output switch is OFF.
01 SMU forces voltage, and does not reach current compliance.
02 SMU forces positive current, and does not reach voltage compliance.
03 SMU forces negative current, and does not reach voltage compliance.
10 Not applicable.
11 SMU reaches voltage compliance.
12 SMU reaches positive current compliance.
13 SMU reaches negative current compliance.
20 SMU is oscillating.
30 Not applicable.
40 MFCMU applies DC bias.
51 MFCMU is in the NULL loop unbalance condition.
52 MFCMU is in the IV amplifier saturation condition.
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