User`s manual

Multiple High-Speed Scans
This example shows how a scanning multimeter consisting of the HP E1326B
multimeter and HP E1351A FET multiplexer is programmed for multiple scans
at a 13 kHz rate. The program scans 16 channels 100 times.
10 !Dimension a controller array to store the readings.
20 DIM Rdgs(1:1600)
30 !
Reset the multimeter, turn monitor mode off, and then download the
40 !channel list to the FET multiplexer.
50 OUTPUT 70903;"*RST"
60 OUTPUT 70903;"*OPC?"
70 OUTPUT 70903;"DIAG:FETS 1"
80 ENTER 70903;Rst_done
90 OUTPUT 70903;"DISP:MON OFF"
100 OUTPUT 70903;"CONF:VOLT:DC 7.27,MAX,(@100:115)"
110 !
Configure the multimeter for a burst of measurements. Specify a fixed
120 !range (7.27), a 10
µ
s aperture time (MAX), turn autozero off, and set a
130 !76
µ
s sample period (SAMP:TIM MIN). The number of measurements
140 !(sample count) is determined by multiplying the number of channels times
150 !the number of scans. In this example, 16 channels are scanned 100 times.
160 !Wait for the configuration to complete.
170 OUTPUT 70903;"CONF:VOLT:DC 7.27,MAX"
180 OUTPUT 70903;" CAL:ZERO:AUTO OFF"
190 OUTPUT 70903;" SAMP:COUN 1600"
200 OUTPUT 70903;" SAMP:SOUR TIM"
210 OUTPUT 70903;" SAMP:TIM MIN"
220 OUTPUT 70903;"*OPC?"
230 ENTER 70903;Complete
240 !
The following commands set the FET multiplexer scanning configuration
250 !by writing directly to the multiplexer registers. Specifically, the first
260 !command transfers control of the scan from the multimeter to the user.
270 !The second command enables digital bus triggering, continuous scanning,
280 !and sets the pointer to the beginning of the scan list. The third command
290 !transfers control back to the multimeter. The fourth command closes the
300 !first channel in the list.
310 OUTPUT 70900;"VXI:WRITE 25,4,8"
320 OUTPUT 70900;"VXI:WRITE 25,6,26"
330 OUTPUT 70900;"VXI:WRITE 25,4,0"
340 OUTPUT 70900;"VXI:WRITE 25,4,16"
350 OUTPUT 70900;"*OPC?"
360 ENTER 70900;Complete
Continued on Next Page
54 Using the HP E1326B/E1411B Multimeter Chapter 3