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D
D
OWNLOADING
ATA
Download Messages
In CR400 format, the Impulse downloads data
messages in this general form:
$PLTIT, datatype , value, units, ... * csum
where:
$PLTIT,
is the Criterion message identifier.
datatype,
is the data type. Legal values:
ID = Instrument version number
HV = Horizontal vector
HT = Height data (Impulse 200 only)
RD = Range difference
RC = Range cumulative
value, units, ...
specifies a measurement value and the units in
which that value is expressed. This pattern
repeats as often as needed
Page 59
Electronic Copy of LTI's Impulse User's Manual 8
to specify the downloaded values, except that
the final units designator is not followed by a
comma.
A value may have 1-2 decimal places,
depending on how many will fit in a six-digit
value. The maximum value for any
measurement is 99999.9; the minimum is -
9999.9. Since the instrument cannot measure
more than a few thousand feet, the maximum
possible values can only be obtained through
cumulative distance measurements or by using
a large offset.
Each unit designator is a one-character
indicator. Legal values are:
F=feet
M=meters
th
Edition © October 1998
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