52
EuroPak-15ab Receiver User Manual Rev 1
Chapter 5
Commands
Syntax:
Message ID: 27
Examples:
ASSIGN 0 ACTIVE 37 0 2000
ASSIGN 15 120 -250 0
ASSIGN 11 28 -250 0
The first example sets the first SV channel to acquire satellite PRN 37 in a range from -2000 Hz to +2000 Hz
until the satellite signal has been detected. SV channel 11 is set to acquire satellite PRN 28 at an offset of
-250 Hz only in the third example.
Table 17: Channel State Values
ASSIGN CHANNEL
[ STATE ] [ PRN
[ DOPPLER
WINDOW
] ]
Field
Field
Name
Valid Values
Description
Format
Binary
Bytes
Binary
Offset
1
header
This field contains the
Abbreviated ASCII
command name. See
Section 4.1
on
Page 34
.
H
0
2
channel
0 to 31
SV channel number to apply the command
to. 0 is the first SV channel and 31 is the last:
24GALILEO8GPS: 0-7 for GPSL1
8-15 for GALL1
16-23 for GALE5A
24-31 for GALE5B
See also
Section 5.3.4, CHANCONFIG
starting on
Page 53
and
Table 55
on
Page 122
.
ULong
4
H
3
state
See
Table 17
below.
Optional desired SV channel state. If a value
is not given, the default of
ACTIVE
is used.
Enum
4
H+4
4
prn
0 to 37 for GPS
120 to 138 for GEO
0 to 51 for GAL
Optional satellite PRN code. A value is
required only when the
state
field is set to
ACTIVE
.
Long
4
H+8
5
doppler
-100 000 to 100 000
Optional current Doppler offset of the
satellite specified in the
prn
field in Hz.
NOTE:Satellite motion, receiver antenna
motion, and receiver clock frequency error
must be included in the calculation of
Doppler frequency.
Long
4
H+12
6
window
0 to 10 000
Error or uncertainty in the Doppler estimate
given in the
doppler
field, in Hz.
NOTE:This is a ± value. For example, enter
500 for ± 500 Hz.
ULong
4
H+16
ASCII
Description
IDLE
Set the SV channel to not track any satellites.
ACTIVE
Set the SV channel active.
AUTO
Tell the receiver to automatically assign PRN codes to channels.