ashtech ZY-12 Information Supplement page 46

Pulse Generation screen (Figure 3.15) by selecting PULSE GEN on Screen 4.
Table 3.14 describes the pulse generation parameters.
Rising edge
is GPS second
Figure 3.15. Pulse Generation Parameters Screen
Parameter
PERIOD
OFFSET
OUTPUT TIME ON A:N
B:N C:N D:N
40
1 to 2 ms
Figure 3.14. One PPS Signal Characteristics
Table 3.14. Pulse Generation Parameters
The period of the PPS option may be changed from a half second
up to a maximum of 60 seconds. Default is 1 second.
PPS may be advanced or delayed up to 500 ms in 100-nanosecond
steps. After you specify the period and offset, press [e] to save.
Output time message once every second, synchronized with GPS
time (rising edge of pulse is also synchronized with GPS time)
through serial port A, B, C, or D. Message format is:
$PASHR,PPS,dddddd
where dddddd is the time in seconds of the week
Description
ZY-12 GPS Receiver