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Model 6220/6221 Reference Manual
DISPlay, FORMat, and SYSTem Key-Press Codes
13-5
Return to
ASCII data format
The ASCII data format is in a direct readable form for the operator. Most program-
ming languages easily convert ASCII mantissa and exponent to other formats. How-
ever, some speed is compromised to accommodate the conversion.
shows an example ASCII string that includes all the data elements.
also shows the byte order of the data string. Data elements not speci-
fied by the :ELEMents command are not included in the string.
Figure 13-1
ASCII data format
IEEE-754 single precision format
REAL, 32, or SREal will select the binary IEEE-754 single precision data format.
A shows the normal byte order format for each data element. For
example, if three data elements are selected, the data string for each reading con-
version is made up of three 4-byte data blocks. Note that the data string for each
reading conversion is preceded by a 2-byte header that is the binary equivalent of
an ASCII # sign and 0.
does not show the byte for the terminator that
is attached to the end of each data string. Note that the byte order of the data
string can be sent in reverse order (see ”
NOTE
Regardless of which data format for output
strings is selected, the instrument will only re-
spond to input commands using the ASCII for-
mat.
+1.23456789E-03VDC, +0.000SECS, +1.2345e-06ADC, +1.23456789E-03VDC, xCMPL, +00001RDNG#
READing
TSTamp
UNITs
SOURce
COMPliance
2. Units for delta readings:
VDC = DC Volts
W
= Ohms
W
= Watts
S
= Siemens
AVOLtage
RNUMber
1
2
3
4
1. An overflow reading is displayed as +9.9E37.
3. The average voltage data element is only available for Differential Conductance.
4. For compliance, x = T or F:
TCMPL = In compliance
FCMPL = Not in compliance
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