3 Command Line Reference
3.2.4
Tracking and Measurement Generation
sca
gca
setChannelAllocation
getChannelAllocation
Channel
Channel
Satellite
Search
Doppler
Window
+ Ch01 ... Ch80
all
auto
G01 ... G32
F01 ... F14
E01 ... E36
S120 ... S158
C01 ... C63
J01 ... J07
I01 ... I14
auto
manual
-50000
. . . 0
. . . 50000 Hz
1
. . . 16000
. . . 100000 Hz
RxControl: Navigation > Advanced User Settings > Channel Allocation
Use these commands to define/inquire the satellite-to-channel allocation of the receiver.
The action of the
command is to force the allocation of a partic-
ular satellite on the set of channels identified with the
Channel
argument, thereby overruling
the automatic channel allocation performed by the receiver. It is possible to allocate the
same satellite to more than one channel. If you assign a satellite to a given channel, any
other channel that was automatically allocated to the same satellite will be stopped and will
be reallocated.
The values
Gxx
,
Exx
,
Fxx
,
Cxx
,
Ixx
,
Jxx
and
Sxxx
for the
Satellite
argument represent
GPS, Galileo, GLONASS, BeiDou, NavIC/IRNSS, QZSS and SBAS satellites respectively. For
GLONASS, the frequency number (with an offset of 8) should be provided, and not the slot
number (hence the "F"). Setting the
Satellite
argument to
auto
brings the channel back in
auto-allocation mode.
The user can specify the Doppler window in which the receiver has to search for the satellite.
This is done by setting the
Search
argument to
manual
. In that case, the
Doppler
and
Window
arguments can be provided: the receiver will search for the signal within an interval of
Window
Hz centred on
Doppler
Hz. The value to be provided in the
Doppler
argument is the expected
Doppler at the GPS L1 carrier frequency (1575.42MHz). This value includes the geometric
Doppler and the receiver and satellite frequency biases. Specifying a Doppler window can
speed up the search process in some circumstances. A satellite already in tracking that falls
outside of the prescribed window will remain in tracking.
If
Search
is set to
auto
, the receiver applies its usual search procedure, as it would do for
auto-allocated satellites, and the
Doppler
and
Window
arguments are ignored.
Be aware that this command may disturb the normal operation of the receiver and is in-
tended only for expert-level users.
Note that, when manually allocating a large number of channels to a single constellation,
it is possible that some channels are left idle if the receiver does not have enough tracking
hardware of the type required for the selected constellation.
Examples
COM1>
sca, Ch05, G01 <CR>
$R: sca, Ch05, G01
ChannelAllocation, Ch05, G01, auto, 0, 16000
COM1>
107
Содержание PolaRx5TR
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