Справочник Пользователя для RoyalTek rgm-3000

 

18 

Table 12 Query/Rate Control Data 

Format(See example 1.) 

1.Quety the GGA message with checksum 

enabled: $PSRF103,00,01,00,01*25 

2.Enable VTG message for a 1 Hz 

constant output with checksum enabled: 

$PSRF103,05,00,01,01*20 

3.Disable VTG message 

$PSRF103,05,00,00,01*21 

    Query/Rate Control Data Format(See example 1.) 

Message ID 

$PSRF103 

 

PSRF102 protocol header 

Message 

00 

 

See Table 13 

Mode 

01 

 

0=Set Rate, 1=Query 

Rate 

00 

seconds  Output – off=0,max=255 

Cksum Enable 

01 

 

0=Disable Checksum, 1=Enable Checksum 

Checksum *25  

 

<CR><LF> 

 

 

End of message termination 

  Messages 

0 GGA 
1 GLL 
2 GSA 
3 GSV 
4 RMC 
5 VTG 

This command is used to initialize the 

module for a warm start , by providing 

current position(in latitude, longitude, and 

altitude coordinates), clock offset, and time. 

This enables the receiver to search for the 

correct satellite signals at the correct signal 

parameters . Correct initialization 

parameters enable the receiver to acquire 

signals quickly. 

Table 14 contains the input values for the 

following example: Start using known 

position and time $PSRF104, 37.3875111, 

-121.97232, 0, 95000, 237759, 922, 12, 

3*3A 

    LLA Navigation Initialization Data Format 

Message ID 

$PSRF104 

 

PSRF104 protocol header 

Lat   

37.3875111 

Degrees 

Latitude position (Range 90 to –90) 

Lon 

-121.97232 

Degrees 

Longitude position (Range 180 to –180) 

Alt 0 

Meters 

Altitude 

position 

CLK Offset 

95000 

Hz 

Clock Offset of the Evaluation Unit1 

Time Of Week 

237759 

Seconds 

GPS Time Of Week 

Week No 

922 

 

GPS Week Number 

Channel Count 

12 

 

Range 1 to 12 

Reset Cfg 

3 

 

See Table 15 

Checksum *3A   

 

<CR><LF> 

 

 

End of message termination 

Use 0 for last saved value if available. If this is unavailable, a default value of 96,000 will be used. 

  Reset Configuration 

0x01 

Data Valid – Warm /Hot Starts=1 

0x02 

Clear Ephemeris – Warm Start=1