VXi VT1422A ユーザーズマニュアル

Programming the VT1422A for Data Acquisition and Control 141

configure digital output channel for "alarm channel"

hpe1422_cmd(vi, ’SOURCE:FUNCTION:CONDITION (@132)’)

execute On-board channel calibration (can take several minutes)

hpe1422_cmdInt16_Q(vi, ’*CAL?’, ViPInt16 result)
test "result" for success

execute Remote channel calibration on RSCUs

hpe1422_cmdInt16_Q(vi, ’CAL:REMOTE? (@14000:14931)’, ViPInt16 &result)
test "result" for success

Direct data acquisition channels placed in Scan List. On-board channels 00-07 and 128 remote channels
covered by VT1539A SCPs in positions 5 & 6

hpe1422_cmd(vi, ’ROUTE:SEQUENCE:DEFINE (@100:107,14000:14931)’)

Configure the Trigger System

hpe1422_cmd(vi, ’ARM:SOURCE IMMEDIATE’)

(*RST default)

hpe1422_cmd(vi, ’TRIGGER:COUNT 1’)

(*RST default)

hpe1422_cmd(vi, ’TRIGGER:TIMER .010’)

(*RST default)

hpe1422_cmd(vi, ’TRIGGER:SOURCE TIMER’)

(*RST default)

Set the channel-to-channel measurement pacing (channel settling time)

hpe1422_cmd(vi, ’SAMPle:TIMer 4E-5’)

(*RST default)

specify data format

hpe1422_cmd(vi, ’FORMAT ASC,7’)

(*RST default)

select FIFO mode

hpe1422_cmd(vi, ’SENSE:DATA:FIFO:MODE BLOCK’)

may read FIFO while running

Define algorithm. Algorithm from SCPI sequence on previous page can be put in a text file and saved as
"seqalg.c."

hpe1422_downloadAlg(vi, ’ALG1’, 0, ’seqalg.c’)

Pre-set the algorithm coefficients

hpe1422_algScal(vi, 'ALG1', ’div’, 5)
hpe1422_algScal(vi, 'ALG1', 'mult', 5)
hpe1422_algScal(vi, 'ALG1', 'sub', 0)
hpe1422_cmd(vi, ’ALG:UPDATE’)

all alg vars updated at this time

initiate trigger system (start algorithm)

hpe1422_initImm(vi)

retrieve algorithm data from elements 10 through 15

hpe1422_cmdReal64Arr_Q(vi, ’SENSE:DATA:CVT? (@10:15,330:457)’, 502, myfloat64array[ ],&count)
may test the int32 value "count" for number of cvt values returned