X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
3
3
-
-
6
6
0
0
R
R
E
E
V
V
E
E
Sample request:
F55<CR>
Response:
F55 METERS<CR><LF>
To select feet, send the following character string:
Sample entry:
F55<SP>FEET<CR>
Response:
OK<CR><LF>
Sample request:
F55<CR>
Response:
F55 FEET<CR><LF>
3-256 SERIAL FUNCTION F56 - AVERAGE POSITION ENTRY/REQUEST
Use Serial Function F56 to enter or request the averaged, hence accurate, current antenna position.
This function provides a means of setting an accurate, surveyed position for use in the TIME mode of
operation. Positions provided to the XL-DC via Function F56 should be more accurate than 10 meters,
otherwise better results may be obtained via AUTO mode, unless satellite visibility at the site is too poor
to provide three-dimensional positioning.
The as shipped default position is S 00d00’0.0” W 000d00’0.0”. The position at power-up will be the
same as it was prior to power-down. An averaged position as returned via Function F56 which
subsequently becomes in error by more than 1 km, either due to transport of the receiver and antenna
or error in the initial entry, will be cleared and recalculated automatically once positioning begins at the
new site and the error is detected.
To determine the present position, send F56<CR> and the Serial Port will respond with the following
continuous one line string:
F56<SP><SIGN><SP><DEG>d<MIN>'<SEC>"<SP><SIGN><SP><DEG>d<MIN>'<SEC>"<SP><SP><SP>
<SP or -> <ALT><UNITS><SP><SOURCE><LT>
where:
F
= ASCII character F (f or F for input string)
56
= function number
<SP>
= ASCII space character
<SIGN>
= N or S for latitude; E or W for longitude; or + or - for longitude, latitude or
altitude (-) corresponds to S or W, or no character, <SP> for + altitude
<DEG>
= two-digit degrees for latitude or three-digit degrees for longitude
d
= ASCII character d (d or D for input string -- always d in output string)
<MIN>
= two-digit minutes
'
= ASCII character '(' or m or M for input string -- always ' in output strings)
<SEC>
= two-digit s 1 digit loths of seconds
"
= ASCII character "(" s or S for input string -- always " in output string)
<ALT>
= altitude in feet or meters
<UNITS>
= unit of altitude, either a M or m for meters or F or f for feet, depending on
the units selected with Serial Function F55
<SOURCE>
= the source of the position in one of two formats:
Summary of Contents for 151-600
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