Motorola M12 Oncore User Manual page 98

Motorola GPS Products
M12 Oncore User' s Guide Supplement
Revision 1.0 01/25/00
GPGSA (GPS DOP AND ACTIVE SATELLITES)
This command enables the GPGSA GPS DOP and Active Satellites message and
determines the rate at which the information is transmitted. The periodic rate field
(yyyy) instructs the receiver either to output this message once (polled), or to
output this message at the indicated update rate (continuously). Once the receiver is
set to continuous output, the continuous flow can be stopped by sending a one-time
(polled) output request. The receiver will output the response one final time, and
then terminate any further message outputs. The value of the periodic rate is
retained through a power cycle only if battery backup power is applied.
If the receiver is not computing a position fix (mode field (b) is one), then the xDOP
fields (p.p, q.q, r.r) will be nulled. If the receiver is computing a 2-D position fix
(mode field (b) is two), then the PDOP field (p.p) and the VDOP field (r.r) will be
nulled. Only satellite IDs used in the solution are output; the remaining satellite ID
fields will be nulled.
Default mode: Disabled
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