ashtech G12 - PSM: Navigation Mode Filtering; RID: Receiver Identification Parameters (Format 1)

76 G12 OEM Board & Sensor Reference Manual
Typical LPS response message:
$PASHS,LPS,10,3,1,*14
Table 4.22 describes the typical LPS response message.
d2 Carrier loop parameter:
• 1: This setting indicates a noise
bandwidth of 0=10; suitable for static,
very low phase noise conditions
• 2: This setting indicates a noise
bandwidth of 0=25; suitable for low
dynamic, low phase noise conditions (<
2g when d1=1; < 20g when d1=10)
• 3: This setting indicates a noise
bandwidth of 0=50; suitable for high
dynamic, medium phase noise
conditions (< 6g when d1=1; < 100g
when d1=10)
1, 2, 3
d3 Code loop parameter:
• 1: Indicates noise bandwidth of 0=1.0;
suitable for fast range availability (5
sec.), medium range noise conditions
• 2: Indicates noise bandwidth of 0=0.5;
suitable for medium range availability
(10 sec.), low range noise conditions
• 3: Indicates noise bandwidth of 0=0.1;
suitable for slow range availability (50
sec.), very low range noise conditions
1, 2, 3
Table 4.22. Typical LPS Response Message
Item Description
$PASHR Header
LPS Message identifier
10 Third-order ratio setting for carrier loop (high
acceleration rate)
3 Carrier loop parameter setting (high dynamics,
medium phase noise)
1 Code loop parameter setting (fast range availability,
medium range noise)
14 Checksum
Table 4.21. $PASHR,LPS Format
Parameter Description Range
G12RevD.book Page 76 Tuesday, April 2, 2002 4:33 PM