ashtech DG16 - Page 151

Receiver Commands 131
Receiver Commands
$PASHQ,LPS,[c1]
This command queries the current loop tracking parameter settings, where c1 is
the optional port designator for the output of the response.If a port is not specified,
the receiver sends the response to the current port.
$PASHR,LPS
The response message outputs in the format:
$PASHR,LPS,d1,d2,d3*hh
Table 6.30 outlines the parameters.
Table 6.30. $PASHR,LPS Format
Parameter Description Range
d1 Third-order ratio setting for the carrier loop:
• 0: Indicates a ratio of zero; i.e., the third-order ratio is
disabled
• 1: Indicates a ratio of 0.1; suitable for low acceleration
rates
• 10: Indicates a ratio of 1.0; suitable for high
acceleration rates
0, 1, 10
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