D-8 DDC Emulation Commands Model 6485 Picoammeter Instruction Manual
A. The buffer size command (In) is not used by the Model 485. The buffer size com-
mand is similar to the SCPI TRACe:POINts command (see Section 6 for details).
B. The moving filter cannot be selected from the DDC language.
C. For Model 6485, the terminator commands (Y) to set the terminator are different
from the Y commands used by the 485. Also note that the “YY” response to the U0
command is different.
D. For the Model 6485, the Buffer Full bit in the U1X status word does not get cleared
until either the buffer is resized or buffer storage is reactivated. Note that requesting
a buffer reading does not clear the U1 Buffer Full bit.
E. The U2 status command is not used by the Model 485. The response message indi-
cates the buffer size (In) and the actual number of readings stored in the buffer.
F. Calibration must be already unlocked and enabled.
G. See CALibration subsystem.
Status
Word
U0 Return status word. See Figure D-1. Each parameter
must be queried individually. For example:
SENSe[1]:CURRent:RANGe?
U1 Send data conditions. See Figure D-2. NEW
U2 Buffer size and readings stored. See Figure D-3. D, NEW
Digital
Calibration
V Calibration commands (V+n.nnnnE+nn) not supported G
Execute
X Execute other device-dependent commands. SCPI not
applicable (SCPI commands execute as they are
received)
Terminator
Y(ASCII) Not Available C, NDS
Y0 LFCR (line feed, carriage return) C, NDS
Y1 CRLF (carriage return, line feed) C, NDS X
Y2 LF (line feed) C, NDS
Y3 CR (carriage return) C, NDS
Y4 None C, NDS
Baseline
Suppres-
sion
(Rel)
Z0 Suppression (Rel) disabled
CALCulate2:NULL:STATe OFF
Z1 Suppression (Rel) enabled
CALCulate2:NULL:ACQuire
CALCulate2:NULL:STATe ON
Table D-1 (continued)
Device dependent command summary
Mode Command
Description
Equivalent SCPI commands
Note Default
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