3 Command Line Reference
spps
gpps
setPPSParameters
getPPSParameters
Interval
Polarity
Delay
TimeScale
MaxSyncAge
PulseWidth
off
msec10
msec20
msec50
msec100
msec200
msec250
msec500
sec1
sec2
sec4
sec5
sec10
sec30
sec60
Low2High
High2Low
-1000000.00
. . . 0.00
. . . 1000000.00 ns
GPS
Galileo
BeiDou
GLONASS
UTC
RxClock
0 . . . 60 . . . 3600 s 0.001
. . . 5.000
. . . 1000.000 ms
RxControl: Navigation > Receiver Operation > Timing
Use these commands to define/inquire the parameters of the x-pulse-per-second (xPPS) out-
put. Refer to section 1.27 for additional information on the xPPS functionality.
The
Interval
argument specifies the time interval between the pulses. A special value "
off
"
is defined to disable the xPPS signal.
The
Polarity
argument defines the polarity of the xPPS signal.
The
Delay
argument can be used to compensate for the overall signal delays in the system
(including antenna, antenna cable and xPPS cable). Setting
Delay
to a higher value causes the
xPPS pulse to be generated earlier. For example, if the antenna cable is replaced by a longer
one, the overall signal delay could be increased by, say, 20 ns. If
Delay
is left unchanged,
the xPPS pulse will come 20 ns too late. To re-synchronize the xPPS pulse,
Delay
has to be
increased by 20 ns.
The xPPS pulses are aligned with the time system set with the
TimeScale
argument.
RxClock
corresponds to the receiver time scale. When setting
TimeScale
to
RxClock
, the xPPS pulses
are synchronous with the internal measurement epochs.
The xPPS timing information is derived primarily from the satellites of the system selected
with the
TimeScale
argument. If there is no satellite from that system available, the receiver
will use information from other constellations to maintain the continuity of the pulses. If all
satellite signals are blocked, the xPPS pulses will continue to be generated for a duration set
with the
MaxSyncAge
argument. If
MaxSyncAge
is set to 0, or if
TimeScale
is set to
RxClock
,
this timeout is disabled.
The
PulseWidth
argument sets the duration of the PPS pulse. The maximum duration of the
pulse equals the PPS interval minus 100 microseconds, even if the requested
PulseWidth
is
longer than that.
Example
COM1>
spps, sec1, Low2High, 23.40, GPS, 60, 0.1<CR>
$R: spps, sec1, Low2High, 23.40, GPS, 60, 0.1
PPSParameters, sec1, Low2High, 23.40, GPS, 60, 0.100
COM1>
164
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