Operator`s manual

123 Signametrics
Description
int DMMSetSourceMode(int nDmm, int iMode)
Remarks This Secondary function sets the DC voltage sources to either OPEN_LOOP or
CLOSED_LOO AC. In
CLOSED_LOO used, which augments the 12 bit DAC to
produce 16 effective bits. Open loop updates are very quick. In ClosedLoop mode the
sted every time the DMM is read, making small corrections until the
reading is equal to the set voltage. However, for the ClosedLoop mode to update the
source lev essary to read the DMM multiple times. See DMMSetDCVSource
for more details.
Parameter
Set the DCV and ACV sources to ClosedLoop, or OpenLoop mode.
#include "SM206032.h"
#include "DMMUser.h"
P. In CLOSED_LOOP the sources use the main 12 bit source D
P the Trim DAC is also
source level is adju
el, it is nec
Type/Description
nDmm
int Identifies the DMM. DMMs are numbered starting with zero.
iMode
eturn Value Integer error code.
int Source adjustment mode: CLOSED_LOOP or OPEN_LOOP
R
Value Meaning
DMM_
Negativ
xample
, CLOSED_LOOP); // Select closed loop mode
SetSync
SM2060 ; SM2064 ;
Description
Remarks
e the
Parameter
OKAY
Operation successfully completed.
e Value
Error code
E
DMMSetSourceMode(0
DMM
Enables and sets polarity of Sync output line.
#include "SM206032.h"
int DMMSetSync(int nDmm, int bEnable, int iPolarity)
This function enables or disables the Sync output (available at the DIN7). If bEnable is
set TRUE, iPolarity effects the sync output level. iPolarity set to 0 asserts low level, and
1 sets to high level pulse. This signal can be used as a busy signal or to synchroniz
DMM to other instruments. The default is a disabled output, and active low.
Type/Description
nDmm
int Identifies the DMM. DMMs are numbered starting with zero.
bSync
int Determines whether or not the Sync output is enabled. TRUE
e
iPolarity
int Determines the polarity of the output. 0 sets it to active low and 1
to active high level.
nables and FALSE disables it. The default is FALSE.