u-blox 6

if flag is set.
• locked other setting - If this bit is set, as soon as the receiver can calculate a valid time, the alternative
setting is used. This mode can be used for example to disable Timepulse if time is not locked, or indicate lock
with different duty cycles.
• is frequency - Interpret the 'Frequency/Period' field as frequency rather than period if flag is set.
• is length - Interpret the 'Length/Ratio' field as length rather than ratio if flag is set.
• align to TOW - If this bit is set, pulses are aligned to the top of a second. Alignment is only possible with an
integer count of pulses fitting into one second, if it does not and the bit is set, it will be cleared by the
receiver.
• polarity - If set, the first edge of the pulse is a rising edge.
• grid UTC/GPS - Selection between UTC (0) or GPS (1) timegrid. Also effects the time output by TIM-TP
message.
The pulse interval must be an integer fraction of 1 second to enable alignment to TOW. The
maximum pulse length can't exceed the pulse period.
Timepulse settings shall be chosen in such a way, that neither the high nor the low period of the
output is less than 100 ns (except when disabling it completely), otherwise pulses can be lost.
11.3.1 Example 1:
The example below shows the 1PPS TP signal generated on the TIMEPULSE output according to the specific
parameters of the CFG-TP5 message. The 1 Hz output is maintained whether or not the receiver is locked to
GPS time. The alignment to TOW can only be maintained when GPS time is locked.
GPS.G6-SW-10018-A Public Release Page 28 of 201