ashtech DG14, Reference Manual

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214 DG14 and DG16 Board & Sensor Reference Manual
The DG16 is designed to synchronize raw message output with the hour rollover, so that message
output from multiple receivers can be synchronized regardless of when they were turned on.
Almanac data for all satellites is output once every hour, with one almanac message output for each
satellite in the constellation. The almanac messages are output at interval prescribed by the
$PASHS,RCI command.
At the 10 Hz output rate (0.1 seconds), a baud rate of 115,000 bps is required to output all the raw
data (MBN, PBN, SNV, and SAL). For greater output rates, the raw data must be split between the
two serial ports, or some of the messages should be turned off. To receive data at high baud rates
(e.g., 115,000), you must ensure that your computer has a suitable serial I/O capability. Most newer
computers with Pentium or 486 processors have good enough serial communication to support
high data rates.
SAL: Satellite Almanac Data
$PASHS,RAW,SAL,c1,s2,[f1]
This command enables or disables the almanac data (SAL) messages, where c1
is port A, B or C (optional port), s2 is ON or OFF, and f1 is the optional numeric
output interval setting supporting a range of 0.05 to 999 seconds, depending on
the measurement update rate option installed.
The DG16 output almanac data for all satellites once every hour, and outputs one satellite at each
recording interval (RCI).
10 Hz T 0.1-999 0.1 from 0.1 to 1
1 from 1 to 999
20 Hz W 0.05-999 0.05 from 0.05 to 0.1
0.1 from 0.1 to 1
1 from 1 to 999
DEFAULT SETTING
RCI 1
Table 7.17. Raw Data Update Rate Options and Settings
Installed
Option
Option
Symbol
RCI Range
(seconds)
Increment